6
6.0
Jun 30, 2018
06/18
by
A. Marinucci; G. Matt; S. Bianchi; T. N. Lu; P. Arevalo; M. Baloković; D. Ballantyne; F. E. Bauer; S. E. Boggs; F. E. Christensen; W. W. Craig; P. Gandhi; C. J. Hailey; F. Harrison; S. Puccetti; E. Rivers; D. J. Walton; D. Stern; W. Zhang
texts
eye 6
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We present NuSTAR observations of the bright Seyfert 2 galaxy NGC 2110 obtained in 2012, when the source was at the highest flux level ever observed, and in 2013, when the source was at a more typical flux level. We include archival observations from other X-ray satellites, namely XMM-Newton, Suzaku, BeppoSAX, Chandra and Swift. Simultaneous NuSTAR and Swift broad band spectra (in the 3-80 keV range) indicate a cutoff energy $E_{\rm c}>210$ keV, with no detectable contribution from Compton...
Topics: High Energy Astrophysical Phenomena, Astrophysics
Source: http://arxiv.org/abs/1411.5151
8
8.0
Jun 30, 2018
06/18
by
B. D Lehmer; M. Berkeley; A. Zezas; D. M. Alexander; A. Basu-Zych; F. E. Bauer; W. N. Brandt; T. Fragos; A. E. Hornschemeier; V. Kalogera; A. Ptak; G. R. Sivakoff; P. Tzanavaris; M. Yukita
texts
eye 8
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We present direct constraints on how the formation of low-mass X-ray binary (LMXB) populations in galactic fields depends on stellar age. In this pilot study, we utilize Chandra and Hubble Space Telescope (HST) data to detect and characterize the X-ray point source populations of three nearby early-type galaxies: NGC 3115, 3379, and 3384. The luminosity-weighted stellar ages of our sample span 3-10 Gyr. X-ray binary population synthesis models predict that the field LMXBs associated with...
Topics: Astrophysics of Galaxies, High Energy Astrophysical Phenomena, Astrophysics
Source: http://arxiv.org/abs/1405.2069
3
3.0
Jun 29, 2018
06/18
by
B. D. Lehmer; A. R. Basu-Zych; S. Mineo; W. N. Brandt; R. T. Eufrasio; T. Fragos; A. E. Hornschemeier; B. Luo; Y. Q. Xue; F. E. Bauer; M. Gilfanov; P. Ranalli; D. P. Schneider; O. Shemmer; P. Tozzi; J. R. Trump; C. Vignali; J. -X. Wang; M. Yukita; A. Zezas
texts
eye 3
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We present measurements of the evolution of normal-galaxy X-ray emission from $z \approx$ 0-7 using local galaxies and galaxy samples in the 6 Ms Chandra Deep Field-South (CDF-S) survey. The majority of the CDF-S galaxies are observed at rest-frame energies above 2 keV, where the emission is expected to be dominated by X-ray binary (XRB) populations; however, hot gas is expected to provide small contributions to the observed- frame < 1 keV emission at $z < 1$. We show that a single...
Topics: Astrophysics, Cosmology and Nongalactic Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1604.06461
41
41
Sep 19, 2013
09/13
by
B. D. Lehmer; D. M. Alexander; F. E. Bauer; W. N. Brandt; A. D. Goulding; L. P. Jenkins; A. Ptak; T. P. Roberts
texts
eye 41
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We present new Chandra observations that complete a sample of seventeen (17) luminous infrared galaxies (LIRGs) with D < 60 Mpc and low Galactic column densities of N_H < 5 X 10^20 cm^-2. The LIRGs in our sample have total infrared (8-1000um) luminosities in the range of L_IR ~ (1-8) X 10^11 L_sol. The high-resolution imaging and X-ray spectral information from our Chandra observations allow us to measure separately X-ray contributions from active galactic nuclei (AGNs) and normal galaxy...
Source: http://arxiv.org/abs/1009.3943v1
48
48
Sep 18, 2013
09/13
by
B. D. Lehmer; D. M. Alexander; J. E. Geach; Ian Smail; A. Basu-Zych; F. E. Bauer; S. C. Chapman; Y. Matsuda; C. A. Scharf; M. Volonteri; T. Yamada
texts
eye 48
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We present results from a new ultra-deep 400 ks Chandra observation of the SSA22 protocluster at z = 3.09. We have studied the X-ray properties of 234 z ~ 3 Lyman break galaxies (LBGs; protocluster and field) and 158 z = 3.09 Ly-alpha emitters (LAEs) in SSA22 to measure the influence of the high-density protocluster environment on the accretion activity of supermassive black holes (SMBHs) in these UV-selected star forming populations. We detect individually X-ray emission from active galactic...
Source: http://arxiv.org/abs/0809.5058v1
49
49
Sep 20, 2013
09/13
by
B. D. Lehmer; W. N. Brandt; D. M. Alexander; E. F. Bell; D. H. McIntosh; F. E. Bauer; G. Hasinger; V. Mainieri; T. Miyaji; D. P. Schneider; A. T. Steffen
texts
eye 49
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We investigate the evolution over the last 6.3 Gyr of cosmic time (i.e., since z ~ 0.7) of the average X-ray properties of early-type galaxies within the Extended Chandra Deep Field-South (E-CDF-S). Our early-type galaxy sample includes 539 objects with red-sequence colors and Sersic indices larger than n = 2.5, which were selected jointly from the COMBO-17 (Classifying Objects by Medium-Band Observations in 17 Filters) and GEMS (Galaxy Evolution from Morphologies and SEDs) surveys. We utilize...
Source: http://arxiv.org/abs/astro-ph/0612003v1
48
48
Sep 20, 2013
09/13
by
B. D. Lehmer; W. N. Brandt; D. M. Alexander; F. E. Bauer; D. P. Schneider; P. Tozzi; J. Bergeron; G. P. Garmire; R. Giacconi; R. Gilli; G. Hasinger; A. E. Hornschemeier; A. M. Koekemoer; V. Mainieri; T. Miyaji; M. Nonino; P. Rosati; J. D. Silverman; G. Szokoly; C. Vignali
texts
eye 48
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We present Chandra point-source catalogs for the Extended Chandra Deep Field-South (E-CDF-S) survey. The E-CDF-S consists of four contiguous 250 ks Chandra observations covering an approximately square region of total solid angle ~0.3 deg^2, which flank the existing ~1 Ms Chandra Deep Field-South (CDF-S). The survey reaches sensitivity limits of 1.1 X 10^-16 erg/cm^2/s and 6.7 X 10^-16 erg/cm^2/s for the 0.5-2.0 keV and 2-8 keV bands, respectively. We detect 762 distinct X-ray point sources...
Source: http://arxiv.org/abs/astro-ph/0506607v2
5
5.0
Jun 29, 2018
06/18
by
B. Luo; W. N. Brandt; Y. Q. Xue; B. Lehmer; D. M. Alexander; F. E. Bauer; F. Vito; G. Yang; A. R. Basu-Zych; A. Comastri; R. Gilli; Q. -S. Gu; A. E. Hornschemeier; A. Koekemoer; T. Liu; V. Mainieri; M. Paolillo; P. Ranalli; P. Rosati; D. P. Schneider; O. Shemmer; I. Smail; M. Sun; P. Tozzi; C. Vignali; J. -X. Wang
texts
eye 5
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We present X-ray source catalogs for the $\approx7$ Ms exposure of the Chandra Deep Field-South (CDF-S), which covers a total area of 484.2 arcmin$^2$. Utilizing WAVDETECT for initial source detection and ACIS Extract for photometric extraction and significance assessment, we create a main source catalog containing 1008 sources that are detected in up to three X-ray bands: 0.5-7.0 keV, 0.5-2.0 keV, and 2-7 keV. A supplementary source catalog is also provided including 47 lower-significance...
Topics: Astrophysics, High Energy Astrophysical Phenomena, Cosmology and Nongalactic Astrophysics,...
Source: http://arxiv.org/abs/1611.03501
9
9.0
Jun 29, 2018
06/18
by
C. Ricci; R. J. Assef; D. Stern; R. Nikutta; D. M. Alexander; D. Asmus; D. R. Ballantyne; F. E. Bauer; A. W. Blain; S. Boggs; P. G. Boorman; W. N. Brandt; M. Brightman; C. S. Chang; C. -T. J. Chen; F. E. Christensen; A. Comastri; W. W. Craig; T. Díaz-Santos; P. R. Eisenhardt; D. Farrah; P. Gandhi; C. J. Hailey; F. A. Harrison; H. D. Jun; M. J. Koss; S. LaMassa; G. B. Lansbury; C. B. Markwardt; M. Stalevski; F. Stanley; E. Treister; C. -W. Tsai; D. J. Walton; J. W. Wu; L. Zappacosta; W. W. Zhang
texts
eye 9
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Hot, Dust-Obscured Galaxies (Hot DOGs), selected from the WISE all sky infrared survey, host some of the most powerful Active Galactic Nuclei (AGN) known, and might represent an important stage in the evolution of galaxies. Most known Hot DOGs are at $z> 1.5$, due in part to a strong bias against identifying them at lower redshift related to the selection criteria. We present a new selection method that identifies 153 Hot DOG candidates at $z\sim 1$, where they are significantly brighter and...
Topics: Astrophysics, High Energy Astrophysical Phenomena, Cosmology and Nongalactic Astrophysics,...
Source: http://arxiv.org/abs/1609.04808
6
6.0
Jun 30, 2018
06/18
by
C. Romero-Cañizales; R. Herrero-Illana; M. A. Pérez-Torres; A. Alberdi; E. Kankare; F. E. Bauer; S. D. Ryder; S. Mattila; J. E. Conway; R. J. Beswick; T. W. B. Muxlow
texts
eye 6
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We report radio observations of two stripped-envelope supernovae (SNe), 2010O and 2010P, which exploded within a few days of each other in the luminous infrared galaxy Arp 299. Whilst SN 2010O remains undetected at radio frequencies, SN 2010P was detected (with an astrometric accuracy better than 1 milli arcsec in position) in its optically thin phase in epochs ranging from ~1 to ~3yr after its explosion date, indicating a very slow radio evolution and a strong interaction of the SN ejecta with...
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1403.1036
11
11
Jun 27, 2018
06/18
by
C. Saez; B. D. Lehmer; F. E. Bauer; D. Stern; A. Gonzales; I. Rreza; D. M. Alexander; Y. Matsuda; J. E. Geach; F. A. Harrison; T. Havashino
texts
eye 11
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We present VLT VIMOS, Keck DEIMOS and Keck LRIS multi-object spectra of 367 sources in the field of the z ~ 3.09 protocluster SSA22. Sources are spectroscopically classified via template matching, allowing new identifications for 206 extragalactic sources, including 36 z > 2 Lyman-break galaxies (LBGs) and Lyman-\alpha\ emitters (LAEs), 8 protocluster members, and 94 X-ray sources from the ~ 400 ks Chandra deep survey of SSA22. Additionally, in the area covered by our study, we have...
Topics: Astrophysics of Galaxies, Astrophysics
Source: http://arxiv.org/abs/1504.00737
112
112
Jul 20, 2013
07/13
by
D. J. Rosario; P. Santini; D. Lutz; L. Shao; R. Maiolino; D. M. Alexander; B. Altieri; P. Andreani; H. Aussel; F. E. Bauer; S. Berta; A. Bongiovanni; W. N. Brandt; M. Brusa; J. Cepa; A. Cimatti; T. J. Cox; E. Daddi; D. Elbaz; A. Fontana; N. M. Förster Schreiber; R. Genzel; A. Grazian; E. Le Floch; B. Magnelli; V. Mainieri; H. Netzer; R. Nordon; I. Pérez Garcia; A. Poglitsch; P. Popesso; F. Pozzi; L. Riguccini; G. Rodighiero; M. Salvato; M. Sanchez-Portal; E. Sturm; L. J. Tacconi; I....
texts
eye 112
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(Abridged) We study relationships between the SFR and the nuclear properties of X-ray selected AGNs out to z=2.5, using far-IR data in three extragalactic deep fields as part of the PACS Evolutionary Probe (PEP) program. Guided by studies of intrinsic infra-red AGN SEDs, we show that the majority of the FIR emission in AGNs is produced by cold dust heated by star-formation. We uncover characteristic redshift-dependent trends between the mean FIR luminosity (L_fir) and accretion luminosity...
Source: http://arxiv.org/abs/1203.6069v2
9
9.0
Jun 28, 2018
06/18
by
F. A. Harrison; J. Aird; F. Civano; G. Lansbury; J. R. Mullaney; D. R. Ballantyne; D. M. Alexander; D. Stern; M. Ajello; D. Barret; F. E. Bauer; M. Balokovic; W. N. Brandt; M. Brightman; S. E. Boggs; F. E. Christensen; A. Comastri; W. W. Craig; A. Del Moro; K. Forster; P. Gandhi; P. Giommi; B. W. Grefenstette; C. J. Hailey; R. C. Hickox; A. Hornstrup; T. Kitaguchi; J. Koglin; B. Luo; K. K. Madsen; P. H. Mao; H. Miyasaka; K. Mori; M. Perri; M. Pivovaroff; S. Puccetti; V. Rana; E. Treister; D....
texts
eye 9
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We present the 3-8 keV and 8-24 keV number counts of active galactic nuclei (AGN) identified in the NuSTAR extragalactic surveys. NuSTAR has now resolved 33-39% of the X-ray background in the 8-24 keV band, directly identifying AGN with obscuring columns up to approximately 1e25 /cm2. In the softer 3-8 keV band the number counts are in general agreement with those measured by XMM-Newton and Chandra over the flux range 5e-15 < S(3 - 8 keV)/(erg/cm2/s) < 1e-12 probed by NuSTAR. In the hard...
Topics: Astrophysics, High Energy Astrophysical Phenomena
Source: http://arxiv.org/abs/1511.04183
150
150
Sep 22, 2013
09/13
by
F. E. Bauer; J. J. Condon; T. X. Thuan; J. J. Broderick
texts
eye 150
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We cross-identified the ROSAT Bright Source Catalog (RBSC) and the NRAO VLA Sky Survey (NVSS) to construct the RBSC-NVSS sample of the brightest X-ray sources (>= 0.1 counts/s or ~1E-12 ergs/cm/cm/s in the 0.1-2.4 keV band) that are also radio sources (S >= 2.5 mJy at 1.4 GHz) in the 7.8 sr of extragalactic sky with |b| > 15 degrees. and delta > -40 degrees. The sky density of NVSS sources is low enough that they can be reliably identified with RBSC sources having average rms...
Source: http://arxiv.org/abs/astro-ph/0003002v1
49
49
Sep 19, 2013
09/13
by
F. J. Carrera; J. Ebrero; S. Mateos; M. T. Ceballos; A. Corral; X. Barcons; M. J. Page; S. R. Rosen; M. G. Watson; J. Tedds; R. Della Ceca; T. Maccacaro; H. Brunner; M. Freyberg; G. Lamer; F. E. Bauer; Y. Ueda
texts
eye 49
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AXIS (An XMM-Newton International Survey) is a survey of 36 high Galactic latitude XMM-Newton observations covering 4.8 deg2 and containing 1433 serendipitous X-ray sources detected with 5-sigma significance. We have studied the X-ray source counts in four energy bands soft (0.5-2 keV), hard (2-10 keV), XID (0.5-4.5 keV) and ultra-hard (4.5-7.5 keV). We have combined this survey with shallower and deeper surveys. Our source counts results are compatible with most previous samples in the soft,...
Source: http://arxiv.org/abs/astro-ph/0703451v1
6
6.0
Jun 30, 2018
06/18
by
G. Leloudas; S. Schulze; T. Kruehler; J. Gorosabel; L. Christensen; A. Mehner; A. de Ugarte Postigo; R. Amorin; C. C. Thoene; J. P. Anderson; F. E. Bauer; A. Gallazzi; K. G. Helminiak; J. Hjorth; E. Ibar; D. Malesani; N. Morrell; J. Vinko; J. C. Wheeler
texts
eye 6
favorite 0
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Superluminous supernovae (SLSNe) are very bright explosions that were only discovered recently and that show a preference for occurring in faint dwarf galaxies. Understanding why stellar evolution yields different types of stellar explosions in these environments is fundamental in order to both uncover the elusive progenitors of SLSNe and to study star formation in dwarf galaxies. In this paper, we present the first results of our project to study SUperluminous Supernova Host galaxIES, focusing...
Topics: Astrophysics of Galaxies, Astrophysics
Source: http://arxiv.org/abs/1409.8331
55
55
Sep 21, 2013
09/13
by
J. D. Silverman; V. Mainieri; B. D. Lehmer; D. M. Alexander; F. E. Bauer; J. Bergeron; W. N. Brandt; R. Gilli; G. Hasinger; D. P. Schneider; P. Tozzi; C. Vignali; A. M. Koekemoer; T. Miyaji; P. Popesso; P. Rosati; G. Szokoly
texts
eye 55
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We present an analysis of 109 moderate-luminosity (41.9 < Log L{0.5-8.0 keV} < 43.7) AGN in the Extended Chandra Deep Field-South survey, which is drawn from 5,549 galaxies from the COMBO-17 and GEMS surveys having 0.4 < z < 1.1. These obscured or optically-weak AGN facilitate the study of their host galaxies since the AGN provide an insubstantial amount of contamination to the galaxy light. We find that the color distribution of AGN host galaxies is highly dependent upon (1) the...
Source: http://arxiv.org/abs/0709.3455v2
45
45
Sep 19, 2013
09/13
by
J. D. Silverman; V. Mainieri; M. Salvato; G. Hasinger; J. Bergeron; P. Capak; G. Szokoly; A. Finoguenov; R. Gilli; P. Rosati; P. Tozzi; C. Vignali; D. M. Alexander; W. N. Brandt; B. D. Lehmer; B. Luo; D. Rafferty; Y. Q. Xue; I. Balestra; F. E. Bauer; M. Brusa; A. Comastri; J. Kartaltepe; A. M. Koekemoer; T. Miyaji; D. P. Schneider; E. Treister; L. Wisotski; M. Schramm
texts
eye 45
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We present the results of a program to acquire high-quality optical spectra of X-ray sources detected in the E-CDF-S and its central area. New spectroscopic redshifts are measured for 283 counterparts to Chandra sources with deep exposures (t~2-9 hr per pointing) using multi-slit facilities on both the VLT and Keck thus bringing the total number of spectroscopically-identified X-ray sources to over 500 in this survey field. We provide a comprehensive catalog of X-ray sources detected in the...
Source: http://arxiv.org/abs/1009.1923v1
58
58
Sep 23, 2013
09/13
by
J. E. Geach; D. M. Alexander; B. D. Lehmer; Ian Smail; Y. Matsuda; S. C. Chapman; C. A. Scharf; R. J. Ivison; M. Volonteri; T. Yamada; A. W. Blain; R. G. Bower; F. E. Bauer; A. Basu-Zych
texts
eye 58
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We present the results of a 400ks Chandra survey of 29 extended Ly-alpha emitting nebulae (Ly-alpha Blobs, LABs) in the z=3.09 proto-cluster in the SSA22 field. We detect luminous X-ray counterparts in five LABs, implying a large fraction of active galactic nuclei (AGN) in LABs, f_AGN = 17% down to L_2-32keV ~ 10^44 erg/s. All of the AGN appear to be heavily obscured, with spectral indices implying obscuring column densities of N_H > 10^23 cm^-2. The AGN fraction should be considered a lower...
Source: http://arxiv.org/abs/0904.0452v3
10
10.0
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 10
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
3
3.0
Jun 29, 2018
06/18
by
K. I. I. Koljonen; D. M. Russell; J. M. Corral-Santana; M. Armas Padilla; T. Muñoz-Darias; F. Lewis; M. Coriat; F. E. Bauer
texts
eye 3
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We study in detail the evolution of the 2015 outburst of GS 1354-64 (BW Cir) at optical, UV and X-ray wavelengths using Faulkes Telescope South/LCOGT, SMARTS and Swift. The outburst was found to stay in the hard X-ray state, albeit being anomalously luminous with a peak luminosity of L$_{X} >$ 0.15 L$_{Edd}$, which could be the most luminous hard state observed in a black hole X-ray binary. We found that the optical/UV emission is tightly correlated with the X-ray emission, consistent with...
Topics: Astrophysics, High Energy Astrophysical Phenomena
Source: http://arxiv.org/abs/1602.06414
6
6.0
Jun 29, 2018
06/18
by
L. Tartaglia; A. Pastorello; M. Sullivan; C. Baltay; D. Rabinowitz; P. Nugent; A. J. Drake; S. G. Djorgovski; A. Gal-Yam; S. Fabrika; E. A. Barsukova; V. P. Goranskij; A. F. Valeev; T. Fatkhullin; S. Schulze; A. Mehner; F. E. Bauer; S. Taubenberger; J. Nordin; S. Valenti; D. A. Howell; S. Benetti; E. Cappellaro; G. Fasano; N. Elias-Rosa; M. Barbieri; D. Bettoni; A. Harutyunyan; T. Kangas; E. Kankare; J. C. Martin; S. Mattila; A. Morales-Garoffolo; P. Ochner; Umaa D. Rebbapragada; G. Terreran;...
texts
eye 6
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We report photometric and spectroscopic observations of the optical transient LSQ13zm. Historical data reveal the presence of an eruptive episode (that we label as `2013a') followed by a much brighter outburst (`2013b') three weeks later, that we argue to be the genuine supernova explosion. This sequence of events closely resemble those observed for SN2010mc and (in 2012) SN2009ip. The absolute magnitude reached by LSQ13zm during 2013a ($M_R=-14.87\pm0.25\,\rm{mag}$) is comparable with those of...
Topics: Astrophysics, High Energy Astrophysical Phenomena, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1604.00013
5
5.0
Jun 29, 2018
06/18
by
M. Aravena; R. Decarli; F. Walter; E. Da Cunha; F. E. Bauer; C. L. Carilli; E. Daddi; D. Elbaz; R. J. Ivison; D. A. Riechers; I. Smail; A. M. Swinbank; A. Weiss; T. Anguita; R. J. Assef; E. Bell; F. Bertoldi; R. Bacon; R. Bouwens; P. Cortes; P. Cox; J. Gónzalez-López; J. Hodge; E. Ibar; H. Inami; L. Infante; A. Karim; O. Le Fèvre; B. Magnelli; K. Ota; G. Popping; K. Sheth; P. van der Werf; J. Wagg
texts
eye 5
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We present an analysis of a deep (1$\sigma$=13 $\mu$Jy) cosmological 1.2-mm continuum map based on ASPECS, the ALMA Spectroscopic Survey in the Hubble Ultra Deep Field. In the 1 arcmin$^2$ covered by ASPECS we detect nine sources at $>3.5\sigma$ significance at 1.2-mm. Our ALMA--selected sample has a median redshift of $z=1.6\pm0.4$, with only one galaxy detected at z$>$2 within the survey area. This value is significantly lower than that found in millimeter samples selected at a higher...
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1607.06769
9
9.0
Jun 29, 2018
06/18
by
M. Aravena; R. Decarli; F. Walter; R. Bouwens; P. A. Oesch; C. L. Carilli; F. E. Bauer; E. Da Cunha; E. Daddi; J. Gónzalez-López; R. J. Ivison; D. A. Riechers; Ian Smail; A. M. Swinbank; A. Weiss; T. Anguita; R. Bacon; E. Bell; F. Bertoldi; P. Cortes; P. Cox; J. Hodge; E. Ibar; H. Inami; L. Infante; A. Karim; B. Magnelli; K. Ota; G. Popping; P. van der Werf; J. Wagg; Y. Fudamoto
texts
eye 9
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We present a search for [CII] line and dust continuum emission from optical dropout galaxies at $z>6$ using ASPECS, our ALMA Spectroscopic Survey in the Hubble Ultra-Deep Field (UDF). Our observations, which cover the frequency range $212-272$ GHz, encompass approximately the range $6$4.5 $\sigma$, two of which correspond to blind detections with no optical counterparts. At this significance level, our statistical analysis shows that about 60\% of our candidates are expected to be spurious....
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1607.06772
16
16
Jun 27, 2018
06/18
by
M. Nicholl; S. J. Smartt; A. Jerkstrand; C. Inserra; S. A. Sim; T. -W. Chen; S. Benetti; M. Fraser; A. Gal-Yam; E. Kankare; K. Maguire; K. Smith; M. Sullivan; S. Valenti; D. R. Young; C. Baltay; F. E. Bauer; S. Baumont; D. Bersier; M. -T. Botticella; M. Childress; M. Dennefeld; M. Della Valle; N. Elias-Rosa; U. Feindt; L. Galbany; E. Hadjiyska; L. Le Guillou; G. Leloudas; P. Mazzali; R. McKinnon; J. Polshaw; D. Rabinowitz; S. Rostami; R. Scalzo; B. P. Schmidt; S. Schulze; J. Sollerman; F....
texts
eye 16
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We assemble a sample of 24 hydrogen-poor super-luminous supernovae (SLSNe). Parameterizing the light curve shape through rise and decline timescales shows that the two are highly correlated. Magnetar-powered models can reproduce the correlation, with the diversity in rise and decline rates driven by the diffusion timescale. Circumstellar interaction models can exhibit a similar rise-decline relation, but only for a narrow range of densities, which may be problematic for these models. We find...
Topics: Solar and Stellar Astrophysics, Astrophysics, High Energy Astrophysical Phenomena, Cosmology and...
Source: http://arxiv.org/abs/1503.03310
53
53
Sep 18, 2013
09/13
by
M. P. Muno; F. E. Bauer; F. K. Baganoff; R. M. Bandyopadhyay; G. C. Bower; W. N. Brandt; P. S. Broos; A. Cotera; S. S. Eikenberry; G. P. Garmire; S. D. Hyman; N. E. Kassim; C. C. Lang; T. J. W. Lazio; C. Law; J. C. Mauerhan; M. R. Morris; T. Nagata; S. Nishiyama; S. Park; S. V. Ramirez; S. R. Stolovy; R. Wijnands; Q. D. Wang; Z. Wang; F. Yusef-Zadeh
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We present a catalog of 9017 X-ray sources identified in Chandra observations of a 2 by 0.8 degree field around the Galactic center. We increase the number of known X-ray sources in the region by a factor of 2.5. The catalog incorporates all of the ACIS-I observations as of 2007 August, which total 2.25 Msec of exposure. At the distance to the Galactic center (8 kpc), we are sensitive to sources with luminosities >4e32 erg/s (0.5-8.0 keV; 90% confidence) over an area of one square degree,...
Source: http://arxiv.org/abs/0809.1105v1
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
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eye 6
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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
6
6.0
Jun 30, 2018
06/18
by
S. J. Smartt; S. Valenti; M. Fraser; C. Inserra; D. R. Young; M. Sullivan; A. Pastorello; S. Benetti; A. Gal-Yam; C. Knapic; M. Molinaro; F. Yuan; L. Zampieri; R. Smareglia; K. W. Smith; S. Taubenberger; O. Yaron; J. P. Anderson; C. Ashall; C. Balland; C. Baltay; C. Barbarino; F. E. Bauer; S. Baumont; D. Bersier; N. Blagorodnova; S. Bongard; M. T. Botticella; F. Bufano; M. Bulla; E. Cappellaro; H. Campbell; F. Cellier-Holzem; T. -W. Chen; M. J. Childress; A. Clocchiatti; C. Contreras; M. Dall...
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eye 6
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The Public European Southern Observatory Spectroscopic Survey of Transient Objects (PESSTO) began as a public spectroscopic survey in April 2012. We describe the data reduction strategy and data products which are publicly available through the ESO archive as the Spectroscopic Survey Data Release 1 (SSDR1). PESSTO uses the New Technology Telescope with EFOSC2 and SOFI to provide optical and NIR spectroscopy and imaging. We target supernovae and optical transients brighter than 20.5mag for...
Topics: Instrumentation and Methods for Astrophysics, Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1411.0299
4
4.0
Jun 30, 2018
06/18
by
S. Schulze; D. Malesani; A. Cucchiara; N. R. Tanvir; T. Krühler; A. de Ugarte Postigo; G. Leloudas; J. Lyman; D. Bersier; K. Wiersema; D. A. Perley; P. Schady; J. Gorosabel; J. P. Anderson; A. J. Castro-Tirado; S. B. Cenko; A. De Cia; L. E. Ellerbroek; J. P. U. Fynbo; J. Greiner; J. Hjorth; D. A. Kann; L. Kaper; S. Klose; A. J. Levan; S. Martín; P. T. O'Brien; K. L. Page; G. Pignata; S. Rapaport; R. Sánchez-Ramírez; J. Sollerman; I. A. Smith; M. Sparre; C. C. Thöne; D. J. Watson; D. Xu; F....
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eye 4
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At low redshift, a handful of gamma-ray bursts (GRBs) have been discovered with peak luminosities ($L_{\rm iso} < 10^{48.5}~\rm{erg\,s}^{-1}$) substantially lower than the average of the more distant ones ($L_{\rm iso} > 10^{49.5}~\rm{erg\,s}^{-1}$). The properties of several low-luminosity (low-$L$) GRBs indicate that they can be due to shock break-out, as opposed to the emission from ultrarelativistic jets. Owing to this, it is highly debated how both populations are connected, and...
Topics: High Energy Astrophysical Phenomena, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1401.3774
4
4.0
Jun 29, 2018
06/18
by
S. Schulze; T. Krühler; G. Leloudas; J. Gorosabel; A. Mehner; J. Buchner; S. Kim; E. Ibar; R. Amorín; R. Herrero-Illana; J. P. Anderson; F. E. Bauer; L. Christensen; M. de Pasquale; A. de Ugarte Postigo; A. Gallazzi; J. Hjorth; N. Morrell; D. Malesani; M. Sparre; B. Stalder; A. A. Stark; C. C. Thöne; J. C. Wheeler
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eye 4
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The SUperluminous Supernova Host galaxIES (SUSHIES) survey aims to provide strong new constraints on the progenitors of superluminous supernovae (SLSNe) by understanding the relationship to their host galaxies. Here, we present the photometric properties of 53 H-poor and 16 H-rich SLSN host galaxies out to $z\sim4$. We model the spectral energy distributions of the hosts to derive physical properties (e.g., stellar mass and star-formation-rate distribution functions), which we compare with...
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1612.05978
105
105
Sep 18, 2013
09/13
by
T. X. Thuan; F. E. Bauer; P. Papaderos; Y. I. Izotov
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eye 105
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We present an X-ray study of the three most metal-deficient blue compact dwarf (BCD) galaxies known in the local Universe, based on deep Chandra observations of SBS 0335-052 (0.025 solar abundance), SBS 0335-052W (0.02 solar abundance) and I Zw 18 (0.02 solar abundance). All three are detected, with more than 90% of their X-ray emission arising from point-like sources. The 0.5-10.0 keV luminosities of these point sources are in the range (1.3-8.5)x1e39 erg/s. We interpret them to be single or a...
Source: http://arxiv.org/abs/astro-ph/0401349v1
4
4.0
Jun 30, 2018
06/18
by
T. X. Thuan; F. E. Bauer; Y. I. Izotov
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eye 4
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We present XMM-Newton and Chandra observations of two low-metallicity cometary blue compact dwarf (BCD) galaxies, Mrk 59 and Mrk 71. The first BCD, Mrk 59, contains two ultraluminous X-ray (ULX) sources, IXO 72 and IXO 73, both associated with bright massive stars and H II complexes, as well as one fainter extended source associated with a massive H II complex at the head of the cometary structure. The low-metallicity of Mrk 59 appears to be responsible for the presence of the two ULXs. IXO 72...
Topics: Astrophysics of Galaxies, High Energy Astrophysical Phenomena, Astrophysics
Source: http://arxiv.org/abs/1404.2587
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
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eye 6
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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
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
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eye 4
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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
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57
Sep 23, 2013
09/13
by
Y. Q. Xue; B. Luo; W. N. Brandt; F. E. Bauer; B. D. Lehmer; P. S. Broos; D. P. Schneider; D. M. Alexander; M. Brusa; A. Comastri; A. C. Fabian; R. Gilli; G. Hasinger; A. E. Hornschemeier; A. Koekemoer; T. Liu; V. Mainieri; M. Paolillo; D. A. Rafferty; P. Rosati; O. Shemmer; J. D. Silverman; I. Smail; P. Tozzi; C. Vignali
texts
eye 57
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[abridged] We present point-source catalogs for the 4Ms Chandra Deep Field-South (CDF-S), which is the deepest Chandra survey to date and covers an area of 464.5 arcmin^2. We provide a main source catalog, which contains 740 X-ray point sources that are detected with wavdetect at a false-positive probability threshold of 1E-5 and also satisfy a binomial-probability source-selection criterion of P
Source: http://arxiv.org/abs/1105.5643v1
