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Yeong-Shang Loh
Researcher at Princeton University
Publications - 4
Citations - 1045
Yeong-Shang Loh is an academic researcher from Princeton University. The author has contributed to research in topics: Redshift & Luminosity. The author has an hindex of 4, co-authored 4 publications receiving 1022 citations. Previous affiliations of Yeong-Shang Loh include Carnegie Mellon University & University of Colorado Boulder.
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Journal ArticleDOI
A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey II: Discovery of Three Additional Quasars at z>6
Xiaohui Fan,Michael A. Strauss,Donald P. Schneider,Robert H. Becker,Richard L. White,Zoltan Haiman,Michael D. Gregg,Laura Pentericci,Eva K. Grebe,Vijay K. Narayanan,Yeong-Shang Loh,Gordon T. Richards,James E. Gunn,Robert H. Lupton,Gillian R. Knapp,Zeljko Ivezic,W. N. Brandt +16 more
Abstract: We present the discovery of three new quasars at z>6 in 1300 deg^2 of SDSS imaging data, J114816.64+525150.3 (z=6.43), J104845.05+463718.3 (z=6.23) and J163033.90+401209.6 (z=6.05). The first two objects have weak Ly alpha emission lines; their redshifts are determined from the positions of the Lyman break. They are only accurate to 0.05 and could be affected by the presence of broad absorption line systems. The last object has a Ly alpha strength more typical of lower redshift quasars. Based on a sample of six quasars at z>5.7 that cover 2870 deg^2 presented in this paper and in Paper I, we estimate the comoving density of luminous quasars at z 6 and M_{1450} 5.7 quasars and high-resolution ground-based images (seeing 0.4'') of three additional z>5.7 quasars show that none of them is gravitationally lensed. The luminosity distribution of the high-redshfit quasar sample suggests the bright end slope of the quasar luminosity function at z 6 is shallower than Psi L^{-3.5} (2-sigma), consistent with the absence of strongly lensed objects.
Journal ArticleDOI
Cross - correlation of the Cosmic Microwave Background with the 2MASS galaxy survey: Signatures of dark energy, hot gas, and point sources
TL;DR: In this article, the authors cross-correlate the cosmic microwave background temperature anisotropies observed by the Wilkinson Microwave Anisotropy Probe (WMAP) with the projected distribution of extended sources in the Two Micron All Sky Survey (2MASS).
Posted Content
Physical evidence for dark energy
Ryan Scranton,Niayesh Afshordi,Robert C. Nichol,Joshua A. Frieman,Timothy A. McKay,J. Loveday,J. Annis,Yongzhong Xu,Ravi K. Sheth,Jeffrey A. Munn,R. J. Brunner,James E. Gunn,J. Brinkmann,Robert H. Lupton,Yeong-Shang Loh,István Szapudi,A. J. Connolly,David J. Schlegel,Scott F. Anderson,Stephen M. Kent,Erin S. Sheldon,Brian C. Lee,Zeljko Ivezic,Alexander S. Szalay,Neta A. Bahcall,A. Stebbins,Michael S. Vogeley,Tamás Budavári,Max Tegmark,István Csabai,Chris Stoughton,Daniel J. Eisenstein,David Johnston,Bruce Margon,D. Q. Lamb,Christopher J. Miller,Masataka Fukugita,Donald P. Schneider +37 more
TL;DR: In this paper, the angular cross-correlation between luminous red galaxies from the Sloan Digital Sky Survey and the cosmic microwave background temperature maps from the Wilkinson Microwave Anisotropy Probe was measured.
Journal ArticleDOI
The UV-Optical Color Dependence of Galaxy Clustering in the Local Universe
Yeong-Shang Loh,R. Michael Rich,Sebastien Heinis,Ryan Scranton,Ryan Mallery,Samir Salim,D. Christopher Martin,Ted K. Wyder,Stephane Arnouts,Tom A. Barlow,Karl Forster,Peter G. Friedman,Patrick Morrissey,Susan G. Neff,David Schiminovich,Mark Seibert,Luciana Bianchi,Jose Donas,Timothy M. Heckman,Young-Wook Lee,Barry F. Madore,Bruno Milliard,Alexander S. Szalay,Barry Y. Welsh,S. Yi +24 more
TL;DR: In this article, the authors measure the UV-optical color dependence of galaxy clustering in the local universe, using the clean separation of the red and blue sequences made possible by the NUV-r color-magnitude diagram.