32
32
Sep 20, 2013
09/13
by
Ian D. McGreer; Greg L. Bryan
texts
eye 32
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We use numerical simulations to investigate the importance of HD formation and cooling on the first generation of metal-free stars in a LCDM cosmology. We have implemented and tested non-equilibrium HD chemistry in an adaptive mesh refinement simulation code and applied it to two situations. (1) It is first applied to the formation of 10^5 - 10^6 Msun halos which form in the absence of any ionizing source. We show, in agreement with previous work, that HD cooling is of only marginal importance...
Source: http://arxiv.org/abs/0802.3918v2
55
55
Sep 22, 2013
09/13
by
Ian D. McGreer; Andrei Mesinger; Xiaohui Fan
texts
eye 55
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Cosmic reionization is expected to be complex, extended and very inhomogeneous. Existing constraints at z~6 on the volume-averaged neutral hydrogen fraction, , are highly model-dependent and controversial. Constraints at z
Source: http://arxiv.org/abs/1101.3314v1
41
41
Sep 19, 2013
09/13
by
Ian D. McGreer; David J. Helfand; Richard L. White
texts
eye 41
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We have conducted a pilot survey for z>3.5 quasars by combining the FIRST radio survey with the SDSS. While SDSS already targets FIRST sources for spectroscopy as quasar candidates, our survey includes fainter quasars and greatly improves the discovery rate by using strict astrometric criteria for matching the radio and optical positions. Our method allows for selection of high-redshift quasars with less color bias than with optical selection, as using radio selection essentially eliminates...
Source: http://arxiv.org/abs/0909.4091v1
6
6.0
Jun 29, 2018
06/18
by
Bradley Greig; Andrei Mesinger; Ian D. McGreer; Simona Gallerani; Zoltán Haiman
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eye 6
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We introduce an intrinsic Ly\alpha\ emission line profile reconstruction method for high-$z$ quasars (QSOs). This approach utilises a covariance matrix of emission line properties obtained from a large, moderate-$z$ ($2 \leq z \leq 2.5$), high signal to noise (S/N > 15) sample of BOSS QSOs. For each QSO, we complete a Monte Carlo Markov Chain fitting of the continuum and emission line properties and perform a visual quality assessment to construct a large database of robustly fit spectra....
Topics: Astrophysics, Cosmology and Nongalactic Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1605.09388
66
66
Sep 20, 2013
09/13
by
Ian D. McGreer; Robert H. Becker; David J. Helfand; Richard L. White
texts
eye 66
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From examination of only 4 deg^2 of sky in the NOAO Deep Wide-Field Survey (NDWFS) region, we have identified the first radio-loud quasar at a redshift z>6. The object, FIRST J1427385+331241, was discovered by matching the FLAMEX IR survey to FIRST survey radio sources with NDWFS counterparts. One candidate z>6 quasar was found, and spectroscopy with the Keck II telescope confirmed its identification, yielding a redshift z=6.12. The object is a Broad Absorption Line (BAL) quasar with an...
Source: http://arxiv.org/abs/astro-ph/0607278v2
5
5.0
Jun 28, 2018
06/18
by
Linhua Jiang; Yue Shen; Ian D. McGreer; Xiaohui Fan; Eric Morganson; Rogier A. Windhorst
texts
eye 5
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We present a reverberation mapping (RM) experiment that combines broad- and intermediate-band photometry; it is the first such attempt targeting a sample of 13 quasars at $0.20.2$.
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1511.01520
15
15
Jun 27, 2018
06/18
by
Linhua Jiang; Ian D. McGreer; Xiaohui Fan; Fuyan Bian; Zheng Cai; Benjamin Clement; Ran Wang; Zhou Fan
texts
eye 15
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We present the discovery of eight quasars at z~6 identified in the Sloan Digital Sky Survey (SDSS) overlap regions. Individual SDSS imaging runs have some overlap with each other, leading to repeat observations over an area spanning >4000 deg^2 (more than 1/4 of the total footprint). These overlap regions provide a unique dataset that allows us to select high-redshift quasars more than 0.5 mag fainter in the z band than those found with the SDSS single-epoch data. Our quasar candidates were...
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1504.01741
6
6.0
Jun 30, 2018
06/18
by
Ian D. McGreer; Xiaohui Fan; Michael A. Strauss; Zoltan Haiman; Gordon T. Richards; Linhua Jiang; Fuyan Bian; Donald P. Schneider
texts
eye 6
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We report the serendipitous discoveries of companion galaxies to two high-redshift quasars. SDSS J025617.7+001904 is a z=4.79 quasar included in our recent survey of faint quasars in the SDSS Stripe 82 region. The initial MMT slit spectroscopy shows excess Lyman alpha emission extending well beyond the quasar's light profile. Further imaging and spectroscopy with LBT/MODS1 confirms the presence of a bright galaxy (i_AB = 23.6) located 2arcsec (12 kpc projected) from the quasar with strong Lyman...
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1404.2297
38
38
Sep 20, 2013
09/13
by
Ian D. McGreer; Patrick B. Hall; Xiaohui Fan; Fuyan Bian; Naohisa Inada; Masamune Oguri; Michael A. Strauss; Donald P. Schneider; Kara Farnsworth
texts
eye 38
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We report the discovery of a gravitationally lensed quasar identified serendipitously in the Sloan Digital Sky Survey (SDSS). The object, SDSS J094604.90+183541.8, was initially targeted for spectroscopy as a luminous red galaxy, but the SDSS spectrum has the features of both a z=0.388 galaxy and a z=4.8 quasar. We have obtained additional imaging that resolves the system into two quasar images separated by 3.06 arcsec and a bright galaxy that is strongly blended with one of the quasar images....
Source: http://arxiv.org/abs/1002.3832v2
6
6.0
Jun 30, 2018
06/18
by
Linhua Jiang; Xiaohui Fan; Fuyan Bian; Ian D. McGreer; Michael A. Strauss; James Annis; Zoe Buck; Richard Green; Jacqueline A. Hodge; Adam D. Myers; Alireza Rafiee; Gordon Richards
texts
eye 6
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We present and release co-added images of the Sloan Digital Sky Survey (SDSS) Stripe 82. Stripe 82 covers an area of 300 deg^2 on the Celestial Equator, and has been repeatedly scanned 70-90 times in the ugriz bands by the SDSS imaging survey. By making use of all available data in the SDSS archive, our co-added images are optimized for depth. Input single-epoch frames were properly processed and weighted based on seeing, sky transparency, and background noise before co-addition. The resultant...
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1405.7382
14
14
Jun 26, 2018
06/18
by
Xue-Bing Wu; Feige Wang; Xiaohui Fan; Weimin Yi; Wenwen Zuo; Fuyan Bian; Linhua Jiang; Ian D. McGreer; Ran Wang; Jinyi Yang; Qian Yang; David Thompson; Yuri Beletsky
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eye 14
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So far, roughly 40 quasars with redshifts greater than z=6 have been discovered. Each quasar contains a black hole with a mass of about one billion solar masses ($10^9 M_\odot$). The existence of such black holes when the Universe was less than 1 billion years old presents substantial challenges to theories of the formation and growth of black holes and the coevolution of black holes and galaxies. Here we report the discovery of an ultra-luminous quasar, SDSS J010013.02+280225.8, at redshift...
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1502.07418
63
63
Sep 21, 2013
09/13
by
Jo Bovy; Joseph F. Hennawi; David W. Hogg; Adam D. Myers; Jessica A. Kirkpatrick; David J. Schlegel; Nicholas P. Ross; Erin S. Sheldon; Ian D. McGreer; Donald P. Schneider; Benjamin A. Weaver
texts
eye 63
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We present the SDSS-XDQSO quasar targeting catalog for efficient flux-based quasar target selection down to the faint limit of the Sloan Digital Sky Survey (SDSS) catalog, even at medium redshifts (2.5
Source: http://arxiv.org/abs/1011.6392v2
13
13
Jun 27, 2018
06/18
by
Feige Wang; Xue-Bing Wu; Xiaohui Fan; Jinyi Yang; Zheng Cai; Weimin Yi; Wenwen Zuo; Ran Wang; Ian D. McGreer; Luis C. Ho; Minjin Kim; Qian Yang; Fuyan Bian; Linhua Jiang
texts
eye 13
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We report the discovery of an ultra-luminous quasar J030642.51+185315.8 (hereafter J0306+1853) at redshift 5.363, which hosts a super-massive black hole (SMBH) with $M_{BH} = (1.07 \pm 0.27) \times10^{10}~M_\odot$. With an absolute magnitude $M_{1450}=-28.92$ and bolometric luminosity $L_{bol}\sim3.4\times10^{14} L_{\odot}$, J0306+1853 is one of the most luminous objects in the early Universe. It is not likely to be a beamed source based on its small flux variability, low radio loudness and...
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1506.01765
18
18
Jun 28, 2018
06/18
by
Gordon T. Richards; Adam D. Myers; Christina M. Peters; Coleman M. Krawczyk; Greg Chase; Nicholas P. Ross; Xiaohui Fan; Linhua Jiang; Mark Lacy; Ian D. McGreer; Jonathan R. Trump; Ryan N. Riegel
texts
eye 18
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We identify 885,503 type 1 quasar candidates to i
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1507.07788
6
6.0
Jun 30, 2018
06/18
by
Jinyi Yang; Xiaohui Fan; Xue-Bing Wu; Feige Wang; Fuyan Bian; Qian Yang; Ian D. McGreer; Weimin Yi; Linhua Jiang; Richard Green; Minghao Yue; Shu Wang; Zefeng Li; Jiani Ding; Simon Dye; Andy Lawrence
texts
eye 6
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We present initial results from the first systematic survey of luminous $z\sim 5.5$ quasars. Quasars at $z \sim$ 5.5, the post-reionization epoch, are crucial tools to explore the evolution of intergalactic medium, quasar evolution and the early super-massive black hole growth. However, it has been very challenging to select quasars at redshifts 5.3 $\le z \le$ 5.7 using conventional color selections, due to their similar optical colors to late-type stars, especially M dwarfs, resulting in a...
Topics: Astrophysics of Galaxies, Astrophysics
Source: http://arxiv.org/abs/1703.03526
69
69
Sep 22, 2013
09/13
by
Fuyan Bian; Xiaohui Fan; Jill Bechtold; Ian D. McGreer; Dennis W. Just; David J. Sand; Richard F. Green; David Thompson; Chien Y. Peng; Walter Seifert; Nancy Ageorges; Marcus Juette; Volker Knierim; Peter Buschkamp
texts
eye 69
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We present rest-frame optical images and spectra of the gravitationally lensed, star-forming galaxy J0900+2234 (z=2.03). The observations were performed with the newly commissioned LUCIFER1 near-infrared instrument mounted on the Large Binocular Telescope (LBT). We fit lens models to the rest-frame optical images and find the galaxy has an intrinsic effective radius of 7.4 kpc with a lens magnification factor of about 5 for the A and B components. We also discovered a new arc belonging to...
Source: http://arxiv.org/abs/1004.4318v2
11
11
Jun 29, 2018
06/18
by
Jinyi Yang; Feige Wang; Xue-Bing Wu; Xiaohui Fan; Ian D. McGreer; Fuyan Bian; Weimin Yi; Qian Yang; Yanli Ai; Xiaoyi Dong; Wenwen Zuo; Richard Green; Linhua Jiang; Shu Wang; Ran Wang; Minghao Yue
texts
eye 11
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This is the second paper in a series on a new luminous z ~ 5 quasar survey using optical and near-infrared colors. Here we present a new determination of the bright end of the quasar luminosity function (QLF) at z ~ 5. Combined our 45 new quasars with previously known quasars that satisfy our selections, we construct the largest uniform luminous z ~ 5 quasar sample to date, with 99 quasars in the range 4.7
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1607.04415
6
6.0
Jun 29, 2018
06/18
by
Feige Wang; Xue-Bing Wu; Xiaohui Fan; Jinyi Yang; Weimin Yi; Fuyan Bian; Ian D. McGreer; Qian Yang; Yanli Ai; Xiaoyi Dong; Wenwen Zuo; Linhua Jiang; Richard Green; Shu Wang; Zheng Cai; Ran Wang; Minghao Yue
texts
eye 6
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High-redshift quasars are important tracers of structure and evolution in the early universe. However, they are very rare and difficult to find when using color selection because of contamination from late-type dwarfs. High-redshift quasar surveys based on only optical colors suffer from incompleteness and low identification efficiency, especially at $z\gtrsim4.5$. We have developed a new method to select $4.7\lesssim z \lesssim 5.4$ quasars with both high efficiency and completeness by...
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1602.04659
64
64
Sep 23, 2013
09/13
by
Ian D. McGreer; Linhua Jiang; Xiaohui Fan; Gordon T. Richards; Michael A. Strauss; Nicholas P. Ross; Martin White; Yue Shen; Donald P. Schneider; Adam D. Myers; W. Niel Brandt; Colin DeGraf; Eilat Glikman; Jian Ge; Alina Streblyanska
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eye 64
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We present a measurement of the Type I quasar luminosity function at z=5 using a large sample of spectroscopically confirmed quasars selected from optical imaging data. We measure the bright end (M_1450
Source: http://arxiv.org/abs/1212.4493v2
3
3.0
Jun 29, 2018
06/18
by
Linhua Jiang; Ian D. McGreer; Xiaohui Fan; Michael A. Strauss; Eduardo Banados; Robert H. Becker; Fuyan Bian; Kara Farnsworth; Yue Shen; Feige Wang; Ran Wang; Shu Wang; Richard L. White; Jin Wu; Xue-Bing Wu; Jinyi Yang; Qian Yang
texts
eye 3
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We present the discovery of nine quasars at $z\sim6$ identified in the Sloan Digital Sky Survey (SDSS) imaging data. This completes our survey of $z\sim6$ quasars in the SDSS footprint. Our final sample consists of 52 quasars at $5.7
Topics: Astrophysics, Cosmology and Nongalactic Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1610.05369
4
4.0
Jun 29, 2018
06/18
by
Trey W. Jensen; M. Vivek; Kyle S. Dawson; Scott F. Anderson; Julian Bautista; Dmitry Bizyaev; William N. Brandt; Joel R. Brownstein; Paul Green; David W. Harris; Vikrant Kamble; Ian D. McGreer; Andrea Merloni; Adam Myers; Daniel Oravetz; Kaike Pan; Isabelle Pâris; Donald P. Schneider; Audrey Simmons; Nao Suzuki
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eye 4
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We report on the diversity in quasar spectra from the Baryon Oscillation Spectroscopic Survey. After filtering the spectra to mitigate selection effects and Malmquist bias associated with a nearly flux-limited sample, we create high signal-to-noise ratio composite spectra from 58,656 quasars (2.1 \le z \le 3.5), binned by luminosity, spectral index, and redshift. With these composite spectra, we confirm the traditional Baldwin effect (BE, i.e., the anticorrelation of C IV equivalent width (EW)...
Topics: Astrophysics, Cosmology and Nongalactic Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1611.08884
13
13
Jun 26, 2018
06/18
by
Yue Shen; Jenny E. Greene; Luis C. Ho; W. N. Brandt; Kelly D. Denney; Keith Horne; Linhua Jiang; Christopher S. Kochanek; Ian D. McGreer; Andrea Merloni; Bradley M. Peterson; Patrick Petitjean; Donald P. Schneider; Andreas Schulze; Michael A. Strauss; Charling Tao; Jonathan R. Trump; Kaike Pan; Dmitry Bizyaev
texts
eye 13
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We present host stellar velocity dispersion measurements for a sample of 88 broad-line quasars at 0.10.6) from the Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) project. High signal-to-noise ratio coadded spectra (average S/N~30 per 69 km/s pixel) from SDSS-RM allowed decomposition of the host and quasar spectra, and measurement of the host stellar velocity dispersions and black hole (BH) masses using the single-epoch (SE) virial method. The large sample size and dynamic range in...
Topics: Cosmology and Nongalactic Astrophysics, Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1502.01034
8
8.0
Jun 30, 2018
06/18
by
Feige Wang; Xiaohui Fan; Jinyi Yang; Xue-Bing Wu; Qian Yang; Fuyan Bian; Ian D. McGreer; Jiang-Tao Li; Zefeng Li; Jiani Ding; Arjun Dey; Simon Dye; Joseph R. Findlay; Richard Green; David James; Linhua Jiang; Dustin Lang; Andy Lawrence; Adam D. Myers; Nicholas P. Ross; David J. Schlegel; Tom Shanks
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eye 8
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We present the first discoveries from a survey of $z\gtrsim6$ quasars using imaging data from the DECam Legacy Survey (DECaLS) in the optical, the UKIRT Deep Infrared Sky Survey (UKIDSS) and a preliminary version of the UKIRT Hemisphere Survey (UHS) in the near-IR, and ALLWISE in the mid-IR. DECaLS will image 9000 deg$^2$ of sky down to $z_{\rm AB}\sim23.0$, and UKIDSS and UHS, which will map the northern sky at $06.5$ to $J_{\rm VEGA}
Topics: Astrophysics of Galaxies, Astrophysics
Source: http://arxiv.org/abs/1703.07490
14
14
Jun 27, 2018
06/18
by
C. J. Grier; P. B. Hall; W. N. Brandt; J. R. Trump; Yue Shen; M. Vivek; N. Filiz Ak; Yuguang Chen; K. S. Dawson; K. D. Denney; Paul. J. Green; Linhua Jiang; C. S. Kochanek; Ian D. McGreer; I. Pâris; B. M. Peterson; D. P. Schneider; Charling Tao; W. M. Wood-Vasey; Dmitry Bizyaev; Jian Ge; Karen Kinemuchi; Daniel Oravetz; Kaike Pan; Audrey Simmons
texts
eye 14
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We report the discovery of rapid variations of a high-velocity CIV broad absorption line trough in the quasar SDSS J141007.74+541203.3. This object was intensively observed in 2014 as a part of the Sloan Digital Sky Survey Reverberation Mapping Project, during which 32 epochs of spectroscopy were obtained with the Baryon Oscillation Spectroscopic Survey spectrograph. We observe significant (>4sigma) variability in the equivalent width of the broad (~4000 km/s wide) CIV trough on rest-frame...
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1503.03076
7
7.0
Jun 28, 2018
06/18
by
Yue Shen; Keith Horne; C. J. Grier; Bradley M. Peterson; Kelly D. Denney; Jonathan R. Trump; Mouyuan Sun; W. N. Brandt; Christopher S. Kochanek; Kyle S. Dawson; Paul J. Green; Jenny E. Greene; Patrick B. Hall; Luis C. Ho; Linhua Jiang; Karen Kinemuchi; Ian D. McGreer; Patrick Petitjean; Gordon T. Richards; Donald P. Schneider; Michael A. Strauss; Charling Tao; W. M. Wood-Vasey; Ying Zu; Kaike Pan; Dmitry Bizyaev; Jian Ge; Daniel Oravetz; Audrey Simmons
texts
eye 7
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Reverberation mapping (RM) measurements of broad-line region (BLR) lags in z>0.3 quasars are important for directly measuring black hole masses in these distant objects, but so far there have been limited attempts and success given the practical difficulties of RM in this regime. Here we report preliminary results of 15 BLR lag measurements from the Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) project, a dedicated RM program with multi-object spectroscopy designed for RM over a...
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1510.02802
17
17
Jun 28, 2018
06/18
by
Adam D. Myers; Nathalie Palanque-Delabrouille; Abhishek Prakash; Isabelle Pâris; Christophe Yeche; Kyle S. Dawson; Jo Bovy; Dustin Lang; David J. Schlegel; Jeffrey A. Newman; Patrick Petitjean; Jean Paul Kneib; Pierre Laurent; Will J. Percival; Ashley J. Ross; Hee-Jong Seo; Jeremy L. Tinker; Eric Armengaud; Joel Brownstein; Etienne Burtin; Zheng Cai; Johan Comparat; Mansi Kasliwal; Shrinivas R. Kulkarni; Russ Laher; David Levitan; Cameron K. McBride; Ian D. McGreer; Adam A. Miller; Peter...
texts
eye 17
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As part of the Sloan Digital Sky Survey IV the extended Baryon Oscillation Spectroscopic Survey (eBOSS) will improve measurements of the cosmological distance scale by applying the Baryon Acoustic Oscillation (BAO) method to quasar samples. eBOSS will adopt two approaches to target quasars over 7500 sq. deg. First, a "CORE" quasar sample will combine optical selection in ugriz using a likelihood-based routine called XDQSOz, with a mid-IR-optical color-cut. eBOSS CORE selection (to g...
Topics: Cosmology and Nongalactic Astrophysics, Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1508.04472
6
6.0
Jun 30, 2018
06/18
by
Yue Shen; W. N. Brandt; Kyle S. Dawson; Patrick B. Hall; Ian D. McGreer; Scott F. Anderson; Yuguang Chen; Kelly D. Denney; Sarah Eftekharzadeh; Xiaohui Fan; Yang Gao; Paul J. Green; Jenny E. Greene; Luis C. Ho; Keith Horne; Linhua Jiang; Brandon C. Kelly; Karen Kinemuchi; Christopher S. Kochanek; Isabelle Pâris; Christina M. Peters; Bradley M. Peterson; Patrick Petitjean; Kara Ponder; Gordon T. Richards; Donald P. Schneider; Anil Seth; Robyn N. Smith; Michael A. Strauss; Charling Tao; Jonathan...
texts
eye 6
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The Sloan Digital Sky Survey Reverberation Mapping project (SDSS-RM) is a dedicated multi-object RM experiment that has spectroscopically monitored a sample of 849 broad-line quasars in a single 7 deg$^2$ field with the SDSS-III BOSS spectrograph. The RM quasar sample is flux-limited to i_psf=21.7 mag, and covers a redshift range of 0.10.3, and will investigate the prospects of RM with all major broad lines covered in optical spectroscopy. SDSS-RM will provide guidance on future multi-object RM...
Topics: Instrumentation and Methods for Astrophysics, Astrophysics of Galaxies, Astrophysics, Cosmology and...
Source: http://arxiv.org/abs/1408.5970
84
84
Sep 22, 2013
09/13
by
Nicholas P. Ross; Ian D. McGreer; Martin White; Gordon T. Richards; Adam D. Myers; Nathalie Palanque-Delabrouille; Michael A. Strauss; Scott F. Anderson; Yue Shen; W. N. Brandt; Christophe Yeche; Molly E. C. Swanson; Eric Aubourg; Stephen Bailey; Dmitry Bizyaev; Jo Bovy; Howard Brewington; J. Brinkmann; Colin DeGraf; Tiziana Di Matteo; Garrett Ebelke; Xiaohui Fan; Jian Ge; Elena Malanushenko; Viktor Malanushenko; Rachel Mandelbaum; Claudia Maraston; Demitri Muna; Daniel Oravetz; Kaike Pan;...
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eye 84
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We present a new measurement of the optical Quasar Luminosity Function (QLF), using data from the Sloan Digital Sky Survey-III: Baryon Oscillation Spectroscopic Survey (SDSS-III: BOSS). From the SDSS-III Data Release Nine (DR9), we select a uniform sample of 22,301 i
Source: http://arxiv.org/abs/1210.6389v1
74
74
Sep 22, 2013
09/13
by
Isabelle Pâris; Patrick Petitjean; Eric Aubourg; Stephen Bailey; Nicholas P. Ross; Adam D. Myers; Michael A. Strauss; Scott F. Anderson; Eduard Arnau; Julian Bautista; Dmitry Bizyaev; Adam S. Bolton; Jo Bovy; William N. Brandt; Howard Brewington; Joel R. Brownstein; Nicolas Busca; Daniel Capellupo; William Carithers; Rupert A. C. Croft; Kyle Dawson; Timothée Delubac; Garrett Ebelke; Daniel J. Eisenstein; Philip Engelke; Xiaohui Fan; Nur Filiz Ak; Hayley Finley; Andreu Font-Ribera; Jian Ge;...
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eye 74
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We present the Data Release 9 Quasar (DR9Q) catalog from the Baryon Oscillation Spectroscopic Survey (BOSS) of the Sloan Digital Sky Survey III. The catalog includes all BOSS objects that were targeted as quasar candidates during the survey, are spectrocopically confirmed as quasars via visual inspection, have luminosities Mi[z=2] 2.15$ (61,931) is ~2.8 times larger than the number of z>2.15 quasars previously known. Redshifts and FWHMs are provided for the strongest emission lines (CIV,...
Source: http://arxiv.org/abs/1210.5166v1
30
30
Jun 28, 2018
06/18
by
Kyle S. Dawson; Jean-Paul Kneib; Will J. Percival; Shadab Alam; Franco D. Albareti; Scott F. Anderson; Eric Armengaud; Eric Aubourg; Stephen Bailey; Julian E. Bautista; Andreas A. Berlind; Isabelle Paris; John A. Peacock; Patrick Petitjean; Matthew M. Pieri; Alice Pisani; Francisco Prada; Abhishek Prakash; Anand Raichoor; Beth Reid; James Rich; Matthew A. Bershady; Jethro Ridl; Sergio Rodriguez-Torres; Aurelio Carnero Rosell; Ashley J. Ross; Graziano Rossi; John Ruan; Mara Salvato; Conor...
texts
eye 30
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The Extended Baryon Oscillation Spectroscopic Survey (eBOSS) will conduct novel cosmological observations using the BOSS spectrograph at Apache Point Observatory. Observations will be simultaneous with the Time Domain Spectroscopic Survey (TDSS) designed for variability studies and the Spectroscopic Identification of eROSITA Sources (SPIDERS) program designed for studies of X-ray sources. eBOSS will use four different tracers to measure the distance-redshift relation with baryon acoustic...
Topics: Cosmology and Nongalactic Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1508.04473
168
168
Sep 22, 2013
09/13
by
SDSS-III collaboration; :; Hiroaki Aihara; Carlos Allende Prieto; Deokkeun An; Scott F. Anderson; Éric Aubourg; Eduardo Balbinot; Timothy C. Beers; Andreas A. Berlind; Steven J. Bickerton; Dmitry Bizyaev; Michael R. Blanton; John J. Bochanski; Adam S. Bolton; Jo Bovy; W. N. Brandt; J. Brinkmann; Peter J. Brown; Joel R. Brownstein; Nicolas G. Busca; Heather Campbell; Michael A. Carr; Yanmei Chen; Cristina Chiappini; Johan Comparat; Natalia Connolly; Marina Cortes; Rupert A. C. Croft; Antonio J....
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eye 168
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The Sloan Digital Sky Survey (SDSS) started a new phase in August 2008, with new instrumentation and new surveys focused on Galactic structure and chemical evolution, measurements of the baryon oscillation feature in the clustering of galaxies and the quasar Ly alpha forest, and a radial velocity search for planets around ~8000 stars. This paper describes the first data release of SDSS-III (and the eighth counting from the beginning of the SDSS). The release includes five-band imaging of...
Source: http://arxiv.org/abs/1101.1559v2
134
134
Sep 20, 2013
09/13
by
SDSS-III Collaboration; :; Christopher P. Ahn; Rachael Alexandroff; Carlos Allende Prieto; Scott F. Anderson; Timothy Anderton; Brett H. Andrews; Éric Aubourg Stephen Bailey; Rory Barnes; Julian Bautista; Timothy C. Beers; Alessandra Beifiori; Andreas A. Berlind; Vaishali Bhardwaj; Dmitry Bizyaev; Cullen H. Blake; Michael R. Blanton; Michael Blomqvist; John J. Bochanski; Adam S. Bolton; Arnaud Borde; Jo Bovy; W. N. Brandt; J. Brinkmann; Peter J. Brown; Joel R. Brownstein; Kevin Bundy; N. G....
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eye 134
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The Sloan Digital Sky Survey III (SDSS-III) presents the first spectroscopic data from the Baryon Oscillation Spectroscopic Survey (BOSS). This ninth data release (DR9) of the SDSS project includes 535,995 new galaxy spectra (median z=0.52), 102,100 new quasar spectra (median z=2.32), and 90,897 new stellar spectra, along with the data presented in previous data releases. These spectra were obtained with the new BOSS spectrograph and were taken between 2009 December and 2011 July. In addition,...
Source: http://arxiv.org/abs/1207.7137v1
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Sep 22, 2013
09/13
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Daniel J. Eisenstein; David H. Weinberg; Eric Agol; Hiroaki Aihara; Carlos Allende Prieto; Scott F. Anderson; James A. Arns; Eric Aubourg; Stephen Bailey; Eduardo Balbinot; Robert Barkhouser; Timothy C. Beers; Andreas A. Berlind; Steven J. Bickerton; Dmitry Bizyaev; Michael R. Blanton; John J. Bochanski; Adam S. Bolton; Casey T. Bosman; Jo Bovy; Howard J. Brewington; W. N. Brandt; Ben Breslauer; J. Brinkmann; Peter J. Brown; Joel R. Brownstein; Dan Burger; Nicolas G. Busca; Heather Campbell;...
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Building on the legacy of the Sloan Digital Sky Survey (SDSS-I and II), SDSS-III is a program of four spectroscopic surveys on three scientific themes: dark energy and cosmological parameters, the history and structure of the Milky Way, and the population of giant planets around other stars. In keeping with SDSS tradition, SDSS-III will provide regular public releases of all its data, beginning with SDSS DR8 (which occurred in Jan 2011). This paper presents an overview of the four SDSS-III...
Source: http://arxiv.org/abs/1101.1529v2
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78
Jun 25, 2018
06/18
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Shadab Alam; Franco D. Albareti; Carlos Allende Prieto; F. Anders; Scott F. Anderson; Brett H. Andrews; Eric Armengaud; Éric Aubourg; Stephen Bailey; Julian E. Bautista; Rachael L. Beaton; Joseph Huehnerhoff; Linhua Jiang; Jennifer A. Johnson; Karen Kinemuchi; David Kirkby; Francisco Kitaura; Mark A. Klaene; Jean-Paul Kneib; Xavier P. Koenig; Charles R. Lam; Timothy C. Beers; Ting-Wen Lan; Dustin Lang; Pierre Laurent; Jean-Marc Le Goff; Alexie Leauthaud; Khee-Gan Lee; Young Sun Lee; Timothy C....
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The third generation of the Sloan Digital Sky Survey (SDSS-III) took data from 2008 to 2014 using the original SDSS wide-field imager, the original and an upgraded multi-object fiber-fed optical spectrograph, a new near-infrared high-resolution spectrograph, and a novel optical interferometer. All the data from SDSS-III are now made public. In particular, this paper describes Data Release 11 (DR11) including all data acquired through 2013 July, and Data Release 12 (DR12) adding data acquired...
Topics: Instrumentation and Methods for Astrophysics, Astrophysics, Astrophysics of Galaxies, Astrophysics,...
Source: http://arxiv.org/abs/1501.00963
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26
Jun 29, 2018
06/18
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DESI Collaboration; Amir Aghamousa; Jessica Aguilar; Steve Ahlen; Shadab Alam; Lori E. Allen; Carlos Allende Prieto; James Annis; Stephen Bailey; Christophe Balland; Otger Ballester; Salman Habib; Henry Heetderks; Ian Heetderks; Katrin Heitmann; Wojciech A. Hellwing; David A. Herrera; Shirley Ho; Stephen Holland; Klaus Honscheid; Eric Huff; Charles Baltay; Timothy A. Hutchinson; Dragan Huterer; Ho Seong Hwang; Joseph Maria Illa Laguna; Yuzo Ishikawa; Dianna Jacobs; Niall Jeffrey; Patrick...
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DESI (Dark Energy Spectroscopic Instrument) is a Stage IV ground-based dark energy experiment that will study baryon acoustic oscillations (BAO) and the growth of structure through redshift-space distortions with a wide-area galaxy and quasar redshift survey. To trace the underlying dark matter distribution, spectroscopic targets will be selected in four classes from imaging data. We will measure luminous red galaxies up to $z=1.0$. To probe the Universe out to even higher redshift, DESI will...
Topics: Astrophysics, Cosmology and Nongalactic Astrophysics, Instrumentation and Methods for Astrophysics
Source: http://arxiv.org/abs/1611.00036
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31
Jun 29, 2018
06/18
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DESI Collaboration; Amir Aghamousa; Jessica Aguilar; Steve Ahlen; Shadab Alam; Lori E. Allen; Carlos Allende Prieto; James Annis; Stephen Bailey; Christophe Balland; Otger Ballester; Salman Habib; Henry Heetderks; Ian Heetderks; Katrin Heitmann; Wojciech A. Hellwing; David A. Herrera; Shirley Ho; Stephen Holland; Klaus Honscheid; Eric Huff; Charles Baltay; Timothy A. Hutchinson; Dragan Huterer; Ho Seong Hwang; Joseph Maria Illa Laguna; Yuzo Ishikawa; Dianna Jacobs; Niall Jeffrey; Patrick...
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DESI (Dark Energy Spectropic Instrument) is a Stage IV ground-based dark energy experiment that will study baryon acoustic oscillations and the growth of structure through redshift-space distortions with a wide-area galaxy and quasar redshift survey. The DESI instrument is a robotically-actuated, fiber-fed spectrograph capable of taking up to 5,000 simultaneous spectra over a wavelength range from 360 nm to 980 nm. The fibers feed ten three-arm spectrographs with resolution $R=...
Topics: Astrophysics, Cosmology and Nongalactic Astrophysics, Instrumentation and Methods for Astrophysics
Source: http://arxiv.org/abs/1611.00037
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20
Jun 29, 2018
06/18
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SDSS Collaboration; Franco D. Albareti; Carlos Allende Prieto; Andres Almeida; Friedrich Anders; Scott Anderson; Brett H. Andrews; Alfonso Aragon-Salamanca; Maria Argudo-Fernandez; Eric Armengaud; Eric Aubourg; D. A. Garcia-Hernandez; Ana E. Garcia Perez; Rafael A. Garcia; R. Garcia-Dias; Patrick Gaulme; Junqiang Ge; Douglas Geisler; Hector Gil Marin; Bruce Gillespie; Leo Girardi; Vladimir Avila-Reese; Daniel Goddard; Yilen Gomez Maqueo Chew; Violeta Gonzalez-Perez; Kathleen Grabowski; Paul...
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The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) began observations in July 2014. It pursues three core programs: APOGEE-2, MaNGA, and eBOSS. In addition, eBOSS contains two major subprograms: TDSS and SPIDERS. This paper describes the first data release from SDSS-IV, Data Release 13 (DR13), which contains new data, reanalysis of existing data sets and, like all SDSS data releases, is inclusive of previously released data. DR13 makes publicly available 1390 spatially resolved...
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1608.02013
