104
104
Sep 23, 2013
09/13
by
M. Sereno; A. Zitrin
texts
eye 104
favorite 0
comment 0
The high concentrations derived for several strong-lensing clusters present a major inconsistency between theoretical LambdaCDM expectations and measurements. Triaxiality and orientation biases might be at the origin of this disagreement, as clusters elongated along the line-of-sight would have a relatively higher projected mass density, boosting the resulting lensing properties. Analyses of statistical samples can probe further these effects and crucially reduce biases. In this work we perform...
Source: http://arxiv.org/abs/1110.2854v1
39
39
Sep 18, 2013
09/13
by
N. Brosch; E. Almoznino; O. Spector; A. Zitrin
texts
eye 39
favorite 0
comment 0
We describe studies of star formation in various galaxies using primarily observations from the Wise Observatory. In addition to surface photometry in the broad band UBVRI, we also use a set of narrow-band H-alpha filters tuned to different redshifts to isolate the emission line. With these observational data, and using models of evolutionary stellar populations, we unravel the star formation histories of the galaxies and connect them to other parameters, such as the galaxy environment.
Source: http://arxiv.org/abs/0806.2722v1
74
74
Sep 22, 2013
09/13
by
M. Meneghetti; C. Fedeli; A. Zitrin; M. Bartelmann; T. Broadhurst; S. Gottloeber; L. Moscardini; G. Yepes
texts
eye 74
favorite 0
comment 0
A long-standing problem of strong lensing by galaxy clusters regards the observed high rate of giant gravitational arcs as compared to the predictions in the framework of the "standard" cosmological model. Recently, few other inconsistencies between theoretical expectations and observations have been claimed which regard the large size of the Einstein rings and the high concentrations of few clusters with strong lensing features. All of these problems consistently indicate that...
Source: http://arxiv.org/abs/1103.0044v1
55
55
Sep 21, 2013
09/13
by
E. Zackrisson; A. Zitrin; M. Trenti; C. -E. Rydberg; L. Guaita; D. Schaerer; T. Broadhurst; G. Ostlin; T. Strom
texts
eye 55
favorite 0
comment 0
Small galaxies consisting entirely of population III (pop III) stars may form at high redshifts, and could constitute one of the best probes of such stars. Here, we explore the prospects of detecting gravitationally lensed pop III galaxies behind the galaxy cluster J0717.5+3745 (J0717) with both the Hubble Space Telescope (HST) and the upcoming James Webb Space Telescope (JWST). By projecting simulated catalogs of pop III galaxies at z~7-15 through the J0717 magnification maps, we estimate the...
Source: http://arxiv.org/abs/1204.0517v3
5
5.0
Jun 29, 2018
06/18
by
A. Monna; S. Seitz; M. J. Geller; A. Zitrin; A. Mercurio; S. H. Suyu; M. Postman; D. G. Fabricant; H. S. Hwang; A. Koekemoer
texts
eye 5
favorite 0
comment 0
We investigate the mass content of galaxies in the core of the galaxy cluster Abell 611. We perform a strong lensing analysis of the cluster core and use velocity dispersion measurements for individual cluster members as additional constraints. Despite the small number of multiply-imaged systems and cluster members with central velocity dispersions available in the core of A611, the addition of velocity dispersion measurements leads to tighter constraints on the mass associated with the galaxy...
Topics: Astrophysics, Cosmology and Nongalactic Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1602.08491
41
41
Sep 21, 2013
09/13
by
L. D. Bradley; R. J. Bouwens; A. Zitrin; R. Smit; D. Coe; H. C. Ford; W. Zheng; G. D. Illingworth; N. Benítez; T. J. Broadhurst
texts
eye 41
favorite 0
comment 0
We report the discovery of seven strongly lensed Lyman break galaxy (LBG) candidates at z~7 detected in Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) imaging of Abell 1703. The brightest candidate, called A1703-zD1, has an observed (lensed) magnitude of 24.0 AB (26 sigma) in the WFC3/IR F160W band, making it 0.2 magnitudes brighter than the z_850-dropout candidate recently reported behind the Bullet Cluster and 0.7 magnitudes brighter than the previously brightest known z~7.6 galaxy,...
Source: http://arxiv.org/abs/1104.2035v3
4
4.0
Jun 30, 2018
06/18
by
W. Zheng; X. Shu; J. Moustakas; A. Zitrin; H. C. Ford; X. Huang; T. Broadhurst; A. Molino; J. M. Diego; L. Infante; F. E. Bauer; D. D. Kelson; R. Smit
texts
eye 4
favorite 0
comment 0
We report the discovery of 24 Lyman-break candidates at 7
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1402.6743
93
93
Sep 23, 2013
09/13
by
W. Zheng; L. D. Bradley; R. J. Bouwens; H. C. Ford; G. D. Illingworth; N. Benitez; T. Broadhurst; B. Frye; L. Infante; M. J. Jee; V. Motta; X. W. Shu; A. Zitrin
texts
eye 93
favorite 0
comment 0
We report on the discovery of three bright, strongly-lensed objects behind Abell 1703 and CL0024+16 from a dropout search over 25 square arcminutes of deep NICMOS data, with deep ACS optical coverage. They are undetected in the deep ACS images below 8500 A and have clear detections in the J and H bands. Fits to the ACS, NICMOS and IRAC data yield robust photometric redshifts in the range z~6-7 and largely rule out the possibility that they are low-redshift interlopers. All three objects are...
Source: http://arxiv.org/abs/0903.3988v1
8
8.0
Jun 29, 2018
06/18
by
A. Monna; S. Seitz; I. Balestra; P. Rosati; C. Grillo; A. Halkola; S. H. Suyu; D. Coe; G. B. Caminha; B. Frye; A. Koekemoer; A. Mercurio; M. Nonino; M. Postman; A. Zitrin
texts
eye 8
favorite 0
comment 0
We present a detailed strong lensing (SL) mass reconstruction of the core of the galaxy cluster MACSJ 2129.4-0741 ($\rm z_{cl}=0.589$) obtained by combining high-resolution HST photometry from the CLASH survey with new spectroscopic observations from the CLASH-VLT survey. A background bright red passive galaxy at $\rm z_{sp}=1.36$, sextuply lensed in the cluster core, has four radial lensed images located over the three central cluster members. Further 19 background lensed galaxies are...
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1605.08784
4
4.0
Jun 30, 2018
06/18
by
J. González-López; F. E. Bauer; M. Aravena; N. Laporte; L. Bradley; M. Carrasco; R. Carvajal; R. Demarco; R. Kneissl; A. M. Koekemoer; A. M. Muñoz Arancibia; P. Troncoso; E. Villard; A. Zitrin
texts
eye 4
favorite 0
comment 0
Most sub-mm emission line studies of galaxies to date have targeted sources with known redshifts where the frequencies of the lines are well constrained. Recent blind line scans circumvent the spectroscopic redshift requirement, which could represent a selection bias. Our aim is to detect emission lines present in continuum oriented observations. The detection of such lines provides spectroscopic redshift and yields properties of the galaxies. We perform a search for emission lines in the ALMA...
Topics: Astrophysics of Galaxies, Astrophysics
Source: http://arxiv.org/abs/1704.03007
6
6.0
Jun 30, 2018
06/18
by
W. Zheng; A. Zitrin; L. Infante; N. Laporte; X. X. Huang; J. Moustakas; H. C. Ford; X. W. Shu; J. X. Wang; J. M. Diego; F. E. Bauer; P. T. Iribarren; T. Broadhurst; A. Molino
texts
eye 6
favorite 0
comment 0
We search for high-redshift dropout galaxies behind the Hubble Frontier Fields (HFF) galaxy cluster MACS J1149.5+2223, a powerful cosmic lens that has revealed a number of unique objects in its field. Using the deep images from the Hubble and Spitzer space telescopes, we find 11 galaxies at z>7 in the MACS J1149.5+2223 cluster field, and 11 in its parallel field. The high-redshift nature of the bright z~9.6 galaxy MACS1149-JD, previously reported by Zheng et al., is further supported by...
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1701.08484
7
7.0
Jun 30, 2018
06/18
by
A. Monna; S. Seitz; A. Zitrin; M. J. Geller; C. Grillo; A. Mercurio; N. Greisel; A. Halkola; S. H. Suyu; M. Postman; P. Rosati; I. Balestra; A. Biviano; D. Coe; D. G. Fabricant; H. S. Hwang; A. Koekemoer
texts
eye 7
favorite 0
comment 0
We use velocity dispersion measurements of 21 individual cluster members in the core of Abell 383, obtained with MMT Hectospec, to separate the galaxy and the smooth dark halo (DH) lensing contributions. While lensing usually constrains the overall, projected mass density, the innovative use of velocity dispersion measurements as a proxy for masses of individual cluster members breaks inherent degeneracies and allows us to (a) refine the constraints on single galaxy masses and on the galaxy...
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1412.0023
6
6.0
Jun 29, 2018
06/18
by
N. Laporte; L. Infante; P. Troncoso Iribarren; W. Zheng; A. Molino; F. E. Bauer; D. Bina; Tom Broadhurst; I. Chilingarian; S. Garcia; S. Kim; R. Marques-Chaves; J. Moustakas; R. Pelló; I. Pérez-Fournon; X. Shu; A. Streblyanska; A. Zitrin
texts
eye 6
favorite 0
comment 0
In this paper we present the results of our search for and study of $z \gtrsim 6$ galaxy candidates behind the third Frontier Fields (FF) cluster, MACSJ0717.5+3745, and its parallel field, combining data from Hubble and Spitzer. We select 39 candidates using the Lyman Break technique, for which the clear non-detection in optical make the extreme mid-$z$ interlopers hypothesis unlikely. We also take benefit from $z \gtrsim 6$ samples selected using previous Frontier Fields datasets of Abell 2744...
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1602.02775
63
63
Sep 22, 2013
09/13
by
J. Merten; D. Coe; R. Dupke; R. Massey; A. Zitrin; E. S. Cypriano; N. Okabe; B. Frye; F. G. Braglia; Y. Jimenez-Teja; N. Benitez; T. Broadhurst; J. Rhodes; M. Meneghetti; L. A. Moustakas; L. Sodre Jr.; J. Krick; J. N. Bregman
texts
eye 63
favorite 0
comment 0
We present a detailed strong lensing, weak lensing and X-ray analysis of Abell 2744 (z = 0.308), one of the most actively merging galaxy clusters known. It appears to have unleashed `dark', `ghost', `bullet' and `stripped' substructures, each ~10^14 solar masses. The phenomenology is complex and will present a challenge for numerical simulations to reproduce. With new, multiband HST imaging, we identify 34 strongly-lensed images of 11 galaxies around the massive Southern `core'. Combining this...
Source: http://arxiv.org/abs/1103.2772v3
6
6.0
Jun 28, 2018
06/18
by
S. A. Rodney; L. -G. Strolger; P. L. Kelly; M. Bradac; G. Brammer; A. V. Filippenko; R. J. Foley; O. Graur; J. Hjorth; S. W. Jha; C. McCully; A. Molino; A. G. Riess; K. B. Schmidt; J. Selsing; K. Sharon; T. Treu; B. J. Weiner; A. Zitrin
texts
eye 6
favorite 0
comment 0
We present the first year of Hubble Space Telescope imaging of the unique supernova (SN) 'Refsdal', a gravitationally lensed SN at z=1.488$\pm$0.001 with multiple images behind the galaxy cluster MACS J1149.6+2223. The first four observed images of SN Refsdal (images S1-S4) exhibited a slow rise (over ~150 days) to reach a broad peak brightness around 20 April, 2015. Using a set of light curve templates constructed from SN 1987A-like peculiar Type II SNe, we measure time delays for the four...
Topics: Cosmology and Nongalactic Astrophysics, Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1512.05734
61
61
Sep 23, 2013
09/13
by
A. Zitrin; J. Moustakas; L. Bradley; D. Coe; L. A. Moustakas; M. Postman; X. Shu; W. Zheng; N. Benítez; R. Bouwens; T. Broadhurst; H. Ford; O. Host; S. Jouvel; A. Koekemoer; M. Meneghetti; P. Rosati; M. Donahue; C. Grillo; D. Kelson; D. Lemze; E. Medezinski; A. Molino; M. Nonino; S. Ogaz
texts
eye 61
favorite 0
comment 0
We report the discovery of a z_{phot}=6.18^{+0.05}_{-0.07} (95% confidence level) dwarf galaxy, lensed into four images by the galaxy cluster MACS J0329.6-0211 (z_{l}=0.45). The galaxy is observed as a high-redshift dropout in HST/ACS/WFC3 CLASH and Spitzer/IRAC imaging. Its redshift is securely determined due to a clear detection of the Lyman-break in the 18-band photometry, making this galaxy one of the highest-redshift multiply-lensed objects known to date with an observed magnitude of...
Source: http://arxiv.org/abs/1111.5006v3
8
8.0
Jun 29, 2018
06/18
by
M. Meneghetti; P. Natarajan; D. Coe; E. Contini; G. De Lucia; C. Giocoli; A. Acebron; S. Borgani; M. Bradac; J. M. Diego; A. Hoag; M. Ishigaki; T. L. Johnson; E. Jullo; R. Kawamata; D. Lam; M. Limousin; J. Liesenborgs; M. Oguri; K. Sebesta; K. Sharon; L. L. R. Williams; A. Zitrin
texts
eye 8
favorite 0
comment 0
Gravitational lensing by clusters of galaxies offers a powerful probe of their structure and mass distribution. Deriving a lens magnification map for a galaxy cluster is a classic inversion problem and many methods have been developed over the past two decades to solve it. Several research groups have developed techniques independently to map the predominantly dark matter distribution in cluster lenses. While these methods have all provided remarkably high precision mass maps, particularly with...
Topics: Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1606.04548
54
54
Sep 18, 2013
09/13
by
A. Zitrin; M. Meneghetti; K. Umetsu; T. Broadhurst; M. Bartelmann; R. Bouwens; L. Bradley; M. Carrasco; D. Coe; H. Ford; D. Kelson; A. M. Koekemoer; E. Medezinski; J. Moustakas; L. A. Moustakas; M. Nonino; M. Postman; P. Rosati; G. Seidel; S. Seitz; I. Sendra; X. Shu; J. Vega; W. Zheng
texts
eye 54
favorite 0
comment 0
We perform a strong-lensing analysis of the merging galaxy cluster MACS J0416.1-2403 (M0416; z=0.42) in recent CLASH/HST observations. We identify 70 new multiple images and candidates of 23 background sources in the range 0.76 x 10^{14} h^{-1}M_{\odot}) exhibit as elongated critical curves as M0416.
Source: http://arxiv.org/abs/1211.2797v2
9
9.0
Jun 29, 2018
06/18
by
J. González-López; F. E. Bauer; C. Romero-Cañizales; R. Kneissl; E. Villard; R. Carvajal; S. Kim; N. Laporte; T. Anguita; M. Aravena; R. J. Bouwens; L. Bradley; M. Carrasco; R. Demarco; H. Ford; E. Ibar; L. Infante; H. Messias; A. M. Muñoz Arancibia; N. Nagar; N. Padilla; E. Treister; P. Troncoso; A. Zitrin
texts
eye 9
favorite 0
comment 0
Dusty star-forming galaxies are among the most prodigious systems at high redshift (z>1), characterized by high star formation rates and huge dust reservoirs. The bright end of this population has been well characterized in recent years, but considerable uncertainties remain for fainter dusty star-forming galaxies, which are responsible for the bulk of star formation at high redshift and thus play a key role in galaxy growth and evolution. In this first paper of our series, we describe our...
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1607.03808
4
4.0
Jun 28, 2018
06/18
by
P. L. Kelly; G. Brammer; J. Selsing; R. J. Foley; J. Hjorth; S. A. Rodney; L. Christensen; L. -G. Strolger; A. V. Filippenko; T. Treu; C. C. Steidel; A. Strom; A. G. Riess; A. Zitrin; K. B. Schmidt; M. Bradac; S. W. Jha; M. L. Graham; C. McCully; O. Graur; B. J. Weiner; J. M. Silverman
texts
eye 4
favorite 0
comment 0
We have acquired Hubble Space Telescope (HST) and Very Large Telescope near-infrared spectra and images of supernova (SN) Refsdal after its discovery as an Einstein cross in Fall 2014. The HST light curve of SN Refsdal matches the distinctive, slowly rising light curves of SN 1987A-like supernovae (SNe), and we find strong evidence for a broad H-alpha P-Cygni profile in the HST grism spectrum at the redshift (z = 1.49) of the spiral host galaxy. SNe IIn, powered by circumstellar interaction,...
Topics: Astrophysics, Cosmology and Nongalactic Astrophysics, Astrophysics of Galaxies, Solar and Stellar...
Source: http://arxiv.org/abs/1512.09093
7
7.0
Jun 29, 2018
06/18
by
G. A. Ogrean; R. J. van Weeren; C. Jones; W. Forman; W. A. Dawson; N. Golovich; F. Andrade-Santos; S. S. Murray; P. Nulsen; E. Roediger; A. Zitrin; E. Bulbul; R. Kraft; A. Goulding; K. Umetsu; T. Mroczkowski; A. Bonafede; S. Randall; J. Sayers; E. Churazov; L. David; J. Merten; M. Donahue; B. Mason; P. Rosati; A. Vikhlinin; H. Ebeling
texts
eye 7
favorite 0
comment 0
The HST Frontier Fields cluster MACS J1149.6+2223 is one of the most complex merging clusters, believed to consist of four dark matter halos. We present results from deep (365 ks) Chandra observations of the cluster, which reveal the most distant cold front (z=0.544) discovered to date. In the cluster outskirts, we also detect hints of a surface brightness edge that could be the bow shock preceding the cold front. The substructure analysis of the cluster identified several components with large...
Topics: Astrophysics, High Energy Astrophysical Phenomena, Cosmology and Nongalactic Astrophysics,...
Source: http://arxiv.org/abs/1603.06010
4
4.0
Jun 30, 2018
06/18
by
C. Grillo; S. H. Suyu; P. Rosati; A. Mercurio; I. Balestra; E. Munari; M. Nonino; G. B. Caminha; M. Lombardi; G. De Lucia; S. Borgani; R. Gobat; A. Biviano; M. Girardi; K. Umetsu; D. Coe; A. M. Koekemoer; M. Postman; A. Zitrin; A. Halkola; T. Broadhurst; B. Sartoris; V. Presotto; M. Annunziatella; C. Maier; A. Fritz; E. Vanzella; B. Frye
texts
eye 4
favorite 0
comment 0
We present a detailed mass reconstruction and a novel study on the substructure properties in the core of the CLASH and Frontier Fields galaxy cluster MACS J0416.1-2403. We show and employ our extensive spectroscopic data set taken with the VIMOS instrument as part of our CLASH-VLT program, to confirm spectroscopically 10 strong lensing systems and to select a sample of 175 plausible cluster members to a limiting stellar mass of log(M_*/M_Sun) ~ 8.6. We reproduce the measured positions of 30...
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1407.7866
5
5.0
Jun 28, 2018
06/18
by
P. L. Kelly; S. A. Rodney; T. Treu; L. G. Strolger; R. J. Foley; S. W. Jha; J. Selsing; G. Brammer; M. Bradac; S. B. Cenko; M. L. Graham; O. Graur; A. V. Filippenko; J. Hjorth; T. Matheson; C. McCully; A. Molino; M. Nonino; A. G. Riess; K. B. Schmidt; B. Tucker; A. von der Linden; B. J. Weiner; A. Zitrin
texts
eye 5
favorite 0
comment 0
In Hubble Space Telescope (HST) imaging taken on 10 November 2014, four images of supernova (SN) "Refsdal" (redshift z=1.49) appeared in an Einstein-cross--like configuration (images S1-S4) around an early-type galaxy in the cluster MACS J1149.5+2223 (z=0.54). Almost all lens models of the cluster have predicted that the SN should reappear within a year in a second host-galaxy image created by the cluster's potential. In HST observations taken on 11 December 2015, we find a new source...
Topics: Cosmology and Nongalactic Astrophysics, Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1512.04654
7
7.0
Jun 30, 2018
06/18
by
R. J. van Weeren; G. A. Ogrean; C. Jones; W. R. Forman; F. Andrade-Santos; Connor J. J. Pearce; A. Bonafede; M. Brüggen; E. Bulbul; T. E. Clarke; E. Churazov; L. David; W. A. Dawson; M. Donahue; A. Goulding; R. P. Kraft; B. Mason; J. Merten; T. Mroczkowski; P. E. J. Nulsen; P. Rosati; E. Roediger; S. W. Randall; J. Sayers; K. Umetsu; A. Vikhlinin; A. Zitrin
texts
eye 7
favorite 0
comment 0
To investigate the relationship between thermal and non-thermal components in merger galaxy clusters, we present deep JVLA and Chandra observations of the HST Frontier Fields cluster MACS J0717.5+3745. The Chandra image shows a complex merger event, with at least four components belonging to different merging subclusters. NW of the cluster, $\sim 0.7$ Mpc from the center, there is a ram-pressure-stripped core that appears to have traversed the densest parts of the cluster after entering the ICM...
Topics: High Energy Astrophysical Phenomena, Astrophysics of Galaxies, Cosmology and Nongalactic...
Source: http://arxiv.org/abs/1701.04096
5
5.0
Jun 28, 2018
06/18
by
R. J. van Weeren; G. A. Ogrean; C. Jones; W. R. Forman; F. Andrade-Santos; A. Bonafede; M. Brüggen; E. Bulbul; T. E. Clarke; E. Churazov; L. David; W. A. Dawson; M. Donahue; A. Goulding; R. P. Kraft; B. Mason; J. Merten; T. Mroczkowski; S. S. Murray; P. E. J. Nulsen; P. Rosati; E. Roediger; S. W. Randall; J. Sayers; K. Umetsu; A. Vikhlinin; A. Zitrin
texts
eye 5
favorite 0
comment 0
We report on high-resolution JVLA and Chandra observations of the HST Frontier Cluster MACS J0717.5+3745. MACS J0717.5+3745 offers the largest contiguous magnified area of any known cluster, making it a promising target to search for lensed radio and X-ray sources. With the high-resolution 1.0-6.5 GHz JVLA imaging in A and B configuration, we detect a total of 51 compact radio sources within the area covered by the HST imaging. Within this sample we find 7 lensed sources with amplification...
Topics: Astrophysics, Cosmology and Nongalactic Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1512.04527
13
13
Jun 27, 2018
06/18
by
G. Ogrean; R. van Weeren; C. Jones; T. E. Clarke; J. Sayers; T. Mroczkowski; P. E. J. Nulsen; W. Forman; S. S. Murray; M. Pandey-Pommier; S. Randall; E. Churazov; A. Bonafede; R. Kraft; L. David; F. Andrade-Santos; J. Merten; A. Zitrin; K. Umetsu; A. Goulding; E. Roediger; J. Bagchi; E. Bulbul; M. Donahue; H. Ebeling; M. Johnston-Hollitt; B. Mason; P. Rosati; A. Vikhlinin
texts
eye 13
favorite 0
comment 0
Merging galaxy clusters leave long-lasting signatures on the baryonic and non-baryonic cluster constituents, including shock fronts, cold fronts, X-ray substructure, radio halos, and offsets between the dark matter and the gas components. Using observations from Chandra, the Jansky Very Large Array, the Giant Metrewave Radio Telescope, and the Hubble Space Telescope, we present a multiwavelength analysis of the merging Frontier Fields cluster MACS J0416.1-2403 (z=0.396), which consists of a NE...
Topics: Cosmology and Nongalactic Astrophysics, Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1505.05560
8
8.0
Jun 28, 2018
06/18
by
T. Treu; G. Brammer; J. M. Diego; C. Grillo; P. L. Kelly; M. Oguri; S. A. Rodney; P. Rosati; K. Sharon; A. Zitrin; I. Balestra; M. Bradac; T. Broadhurst; G. B. Caminha; A. Halkola; A. Hoag; M. Ishigaki; T. L. Johnson; W. Karman; R. Kawamata; A. Mercurio; K. B. Schmidt; L. G. Strolger; S. H. Suyu; A. V. Filippenko; R. J. Foley; S. W. Jha; B. Patel
texts
eye 8
favorite 0
comment 0
Supernova "Refsdal," multiply imaged by cluster MACSJ1149.5+2223, represents a rare opportunity to make a true blind test of model predictions in extragalactic astronomy, on a time scale that is short compared to a human lifetime. In order to take advantage of this event, we produced seven gravitational lens models with five independent methods, based on Hubble Space Telescope (HST) Hubble Frontier Field images, along with extensive spectroscopic follow-up observations by HST, the...
Topics: Cosmology and Nongalactic Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1510.05750
7
7.0
Jun 28, 2018
06/18
by
G. B. Caminha; C. Grillo; P. Rosati; I. Balestra; W. Karman; M. Lombardi; A. Mercurio; M. Nonino; P. Tozzi; A. Zitrin; A. Biviano; M. Girardi; A. M. Koekemoer; P. Melchior; M. Meneghetti; E. Munari; S. H. Suyu; K. Umetsu; M. Annunziatella; S. Borgani; T. Broadhurst; K. I. Caputi; D. Coe; C. Delgado-Correal; S. Ettori; A. Fritz; B. Frye; R. Gobat; C. Maier; A. Monna; M. Postman; B. Sartoris; S. Seitz; E. Vanzella; B. Ziegler
texts
eye 7
favorite 0
comment 0
We perform a comprehensive study of the total mass distribution of the galaxy cluster RXCJ2248 ($z=0.348$) with a set of high-precision strong lensing models, which take advantage of extensive spectroscopic information on many multiply lensed systems. In the effort to understand and quantify inherent systematics in parametric strong lensing modelling, we explore a collection of 22 models where we use different samples of multiple image families, parametrizations of the mass distribution and...
Topics: Cosmology and Nongalactic Astrophysics, Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1512.04555
5
5.0
Jun 28, 2018
06/18
by
I. Balestra; A. Mercurio; B. Sartoris; M. Girardi; C. Grillo; M. Nonino; P. Rosati; A. Biviano; S. Ettori; W. Forman; C. Jones; A. Koekemoer; E. Medezinski; J. Merten; G. A. Ogrean; P. Tozzi; K. Umetsu; E. Vanzella; R. J. van Weeren; A. Zitrin; M. Annunziatella; G. B. Caminha; T. Broadhurst; D. Coe; M. Donahue; A. Fritz; B. Frye; D. Kelson; M. Lombardi; C. Maier; M. Meneghetti; A. Monna; M. Postman; M. Scodeggio; S. Seitz; B. Ziegler
texts
eye 5
favorite 0
comment 0
We present VIMOS-VLT spectroscopy of the Frontier Fields cluster MACS~J0416.1-2403 (z=0.397). Taken as part of the CLASH-VLT survey, the large spectroscopic campaign provided more than 4000 reliable redshifts, including ~800 cluster member galaxies. The unprecedented sample of cluster members at this redshift allows us to perform a highly detailed dynamical and structural analysis of the cluster out to ~2.2$r_{200}$ (~4Mpc). Our analysis of substructures reveals a complex system composed of a...
Topics: Cosmology and Nongalactic Astrophysics, Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1511.02522
22
22
Jun 27, 2018
06/18
by
M. Girardi; A. Mercurio; I. Balestra; M. Nonino; A. Biviano; C. Grillo; P. Rosati; M. Annunziatella; R. Demarco; A. Fritz; R. Gobat; D. Lemze; V. Presotto; M. Scodeggio; P. Tozzi; G. Bartosch Caminha; M. Brescia; D. Coe; D. Kelson; A. Koekemoer; M. Lombardi; E. Medezinski; M. Postman; B. Sartoris; K. Umetsu; A. Zitrin; W. Boschin; O. Czoske; G. De Lucia; U. Kuchner; C. Maier; M. Meneghetti; P. Monaco; A. Monna; E. Munari; S. Seitz; M. Verdugo; B. Ziegler
texts
eye 22
favorite 0
comment 0
In the effort to understand the link between the structure of galaxy clusters and their galaxy populations, we focus on MACSJ1206.2-0847 at z~0.44 and probe its substructure in the projected phase space through the spectrophotometric properties of a large number of galaxies from the CLASH-VLT survey. Our analysis is mainly based on an extensive spectroscopic dataset of 445 member galaxies, mostly acquired with VIMOS@VLT as part of our ESO Large Programme, sampling the cluster out to a radius...
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1503.05607
6
6.0
Jun 30, 2018
06/18
by
C. Grillo; R. Gobat; V. Presotto; I. Balestra; A. Mercurio; P. Rosati; M. Nonino; E. Vanzella; L. Christensen; G. Graves; A. Biviano; D. Lemze; M. Bartelmann; N. Benitez; R. Bouwens; L. Bradley; T. Broadhurst; D. Coe; M. Donahue; H. Ford; L. Infante; S. Jouvel; D. Kelson; A. Koekemoer; O. Lahav; E. Medezinski; P. Melchior; M. Meneghetti; J. Merten; A. Molino; A. Monna; J. Moustakas; L. A. Moustakas; M. Postman; S. Seitz; K. Umetsu; W. Zheng; A. Zitrin
texts
eye 6
favorite 0
comment 0
We present a strong lensing system in which a double source is imaged 5 times by 2 early-type galaxies. We take advantage in this target of the multi-band photometry obtained as part of the CLASH program, complemented by the spectroscopic data of the VLT/VIMOS and FORS2 follow-up campaign. We use a photometric redshift of 3.7 for the source and confirm spectroscopically the membership of the 2 lenses to the galaxy cluster MACS J1206.2-0847 at redshift 0.44. We exploit the excellent angular...
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1403.0573
65
65
Sep 18, 2013
09/13
by
R. Bouwens; L. Bradley; A. Zitrin; D. Coe; M. Franx; W. Zheng; R. Smit; O. Host; M. Postman; L. Moustakas; I. Labbe; M. Carrasco; A. Molino; M. Donahue; D. D. Kelson; M. Meneghetti; S. Jha; N. Benitez; D. Lemze; K. Umetsu; T. Broadhurst; J. Moustakas; P. Rosati; M. Bartelmann; H. Ford; G. Graves; C. Grillo; L. Infante; Y. Jiminez-Teja; S. Jouvel; O. Lahav; D. Maoz; E. Medezinski; P. Melchior; J. Merten; M. Nonino; S. Ogaz; S. Seitz
texts
eye 65
favorite 0
comment 0
We utilise a two-color Lyman-break selection criterion to search for z~9-10 galaxies over the first 19 clusters in the CLASH program. Key to this search are deep observations in five near-IR passbands to 1.6 microns, allowing us good constraints on the position of the Lyman break to z~10. A systematic search yields three z~9-10 candidates in total above a 6 sigma detection limit. While we have already reported on the most robust of these candidates, two new z~9 candidates (H~26.2-26.9) are also...
Source: http://arxiv.org/abs/1211.2230v2
13
13
Jun 30, 2018
06/18
by
J. Merten; M. Meneghetti; M. Postman; K. Umetsu; A. Zitrin; E. Medezinski; M. Nonino; A. Koekemoer; P. Melchior; D. Gruen; L. A. Moustakas; M. Bartelmann; O. Host; M. Donahue; D. Coe; A. Molino; S. Jouvel; A. Monna; S. Seitz; N. Czakon; D. Lemze; J. Sayers; I. Balestra; P. Rosati; N. Benítez; A. Biviano; R. Bouwens; L. Bradley; T. Broadhurst; M. Carrasco; H. Ford; C. Grillo; L. Infante; D. Kelson; O. Lahav; R. Massey; J. Moustakas; E. Rasia; J. Rhodes; J. Vega; W. Zheng
texts
eye 13
favorite 0
comment 0
We present a new determination of the concentration-mass relation for galaxy clusters based on our comprehensive lensing analysis of 19 X-ray selected galaxy clusters from the Cluster Lensing and Supernova Survey with Hubble (CLASH). Our sample spans a redshift range between 0.19 and 0.89. We combine weak lensing constraints from the Hubble Space Telescope (HST) and from ground-based wide field data with strong lensing constraints from HST. The result are reconstructions of the surface-mass...
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1404.1376
54
54
Sep 22, 2013
09/13
by
A. Zitrin; T. Broadhurst; D. Coe; K. Umetsu; M. Postman; N. Benítez; M. Meneghetti; E. Medezinski; S. Jouvel; L. Bradley; A. Koekemoer; W. Zheng; H. Ford; J. Merten; D. Kelson; O. Lahav; D. Lemze; A. Molino; M. Nonino; M. Donahue; P. Rosati; A. Van der Wel; M. Bartelmann; R. Bouwens; O. Graur; G. Graves; O. Host; L. Infante; S. Jha; Y. Jimenez-Teja; R. Lazkoz; D. Maoz; C. McCully; P. Melchior; L. A. Moustakas; S. Ogaz; B. Patel; E. Regoes; A. Riess; S. Rodney; S. Seitz
texts
eye 54
favorite 0
comment 0
We examine the inner mass distribution of the relaxed galaxy cluster Abell 383 in deep 16-band HST/ACS+WFC3 imaging taken as part of the CLASH multi-cycle treasury program. Our program is designed to study the dark matter distribution in 25 massive clusters, and balances depth with a wide wavelength coverage to better identify lensed systems and generate precise photometric redshifts. This information together with the predictive strength of our strong-lensing analysis method identifies 13 new...
Source: http://arxiv.org/abs/1103.5618v3
7
7.0
Jun 30, 2018
06/18
by
M. Meneghetti; E. Rasia; J. Vega; J. Merten; M. Postman; G. Yepes; F. Sembolini; M. Donahue; S. Ettori; K. Umetsu; I. Balestra; M. Bartelmann; N. Benitez; A. Biviano; R. Bouwens; L. Bradley; T. Broadhurst; D. Coe; N. Czakon; M. De Petris; H. Ford; C. Giocoli; S. Gottloeber; C. Grillo; L. Infante; S. Jouvel; D. Kelson; A. Koekemoer; O. Lahav; D. Lemze; E. Medezinski; P. Melchior; A. Mercurio; A. Molino; L. Moscardini; A. Monna; J. Moustakas; L. A. Moustakas; M. Nonino; J. Rhodes; P. Rosati; J....
texts
eye 7
favorite 0
comment 0
We present the results of a numerical study based on the analysis of the MUSIC-2 simulations, aimed at estimating the expected concentration-mass relation for the CLASH cluster sample. We study nearly 1400 halos simulated at high spatial and mass resolution, which were projected along many lines-of-sight each. We study the shape of both their density and surface-density profiles and fit them with a variety of radial functions, including the Navarro-Frenk-White, the generalised...
Topics: Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1404.1384
45
45
Jul 20, 2013
07/13
by
A. Zitrin; P. Rosati; M. Nonino; C. Grillo; M. Postman; D. Coe; S. Seitz; T. Eichner; T. Broadhurst; S. Jouvel; I. Balestra; A. Mercurio; M. Scodeggio; N. Benítez; L. Bradley; H. Ford; O. Host; Y. Jimenez-Teja; A. Koekemoer; W. Zheng; M. Bartelmann; R. Bouwens; O. Czoske; M. Donahue; O. Graur; G. Graves; L. Infante; S. Jha; D. Kelson; O. Lahav; R. Lazkoz; D. Lemze; M. Lombardi; D. Maoz; C. McCully; E. Medezinski; P. Melchior; M. Meneghetti; J. Merten; A. Molino; L. A. Moustakas; S. Ogaz; B....
texts
eye 45
favorite 0
comment 0
We present a strong-lensing analysis of the galaxy cluster MACS J1206.2-0847 ($z$=0.44) using UV, Optical, and IR, HST/ACS/WFC3 data taken as part of the CLASH multi-cycle treasury program, with VLT/VIMOS spectroscopy for some of the multiply-lensed arcs. The CLASH observations, combined with our mass-model, allow us to identify 47 new multiply-lensed images of 12 distant sources. These images, along with the previously known arc, span the redshift range $1\la z\la5.5$, and thus enable us to...
Source: http://arxiv.org/abs/1107.2649v3
7
7.0
Jun 30, 2018
06/18
by
V. Presotto; M. Girardi; M. Nonino; A. Mercurio; C. Grillo; P. Rosati; A. Biviano; M. Annunziatella; I. Balestra; W. Cui; B. Sartoris; D. Lemze; B. Ascaso; J. Moustakas; H. Ford; A. Fritz; O. Czoske; S. Ettori; U. Kuchner; M. Lombardi; C. Maier; E. Medezinski; A. Molino; M. Scodeggio; V. Strazzullo; P. Tozzi; B. Ziegler; M. Bartelmann; N. Benitez; L. Bradley; M. Brescia; T. Broadhurst; D. Coe; M. Donahue; R. Gobat; G. Graves; D. Kelson; A. Koekemoer; P. Melchior; M. Meneghetti; J. Merten; L....
texts
eye 7
favorite 0
comment 0
We aim at constraining the assembly history of clusters by studying the intra cluster light (ICL) properties, estimating its contribution to the fraction of baryons in stars, f*, and understanding possible systematics/bias using different ICL detection techniques. We developed an automated method, GALtoICL, based on the software GALAPAGOS to obtain a refined version of typical BCG+ICL maps. We applied this method to our test case MACS J1206.2-0847, a massive cluster located at z=0.44, that is...
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1403.4979
7
7.0
Jun 30, 2018
06/18
by
N. Benitez; R. Dupke; M. Moles; L. Sodre; J. Cenarro; A. Marin-Franch; K. Taylor; D. Cristobal; A. Fernandez-Soto; C. Mendes de Oliveira; J. Cepa-Nogue; M. Borges; S. L. Martins; W. Marcolino; D. Martinez-Delgado; M. A. Perez-Torres; B. B. Siffert; M. O. Calvao; M. Sako; R. Kessler; A. Alvarez-Candal; L. R. Abramo; M. De Pra; F. Roig; D. Lazzaro; J. Gorosabel; R. Lopes de Oliveira; G. B. Lima-Neto; J. Irwin; J. F. Liu; E. Alvarez; I. Balmes; J. S. Alcaniz; S. Chueca; M. V. Costa-Duarte; A. A....
texts
eye 7
favorite 0
comment 0
The Javalambre-Physics of the Accelerated Universe Astrophysical Survey (J-PAS) is a narrow band, very wide field Cosmological Survey to be carried out from the Javalambre Observatory in Spain with a purpose-built, dedicated 2.5m telescope and a 4.7 sq.deg. camera with 1.2Gpix. Starting in late 2015, J-PAS will observe 8500sq.deg. of Northern Sky and measure $0.003(1+z)$ photo-z for $9\times10^7$ LRG and ELG galaxies plus several million QSOs, sampling an effective volume of $\sim 14$ Gpc$^3$...
Topics: Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1403.5237
