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What triggers galaxy transformations? The environments of post-starburst galaxies
David W. Hogg, Morad Masjedi, Andreas A. Berlind +3
(abridged) There are good observational reasons to believe that the progenitors of red galaxies have undergone starbursts, followed by a post-starburst phase. We investigate the en…
SDSS J1534+1615AB: A Novel T Dwarf Binary Found with Keck Laser Guide Star Adaptive Optics and the Potential Role of Binarity in the L/T Transition
Michael C. Liu, S. K. Leggett, David A. Golimowski +5
We have resolved the newly discovered T dwarf SDSS J1534+1615 into a 0.11'' binary using the Keck sodium laser guide star adaptive optics system. With an integrated-light spectral…
XMM-Newton and optical follow-up observations of SDSS J093249.57+472523.0 and SDSS J102347.67+003841.2
Lee Homer, Paula Szkody, Bing Chen +5
We report follow-up XMM-Newton and ground-based optical observations of the unusual X-ray binary SDSS J102347.67+003841.2 (=FIRST J102347.6+003841), and a new candidate intermediat…
A Snapshot Survey for Gravitational Lenses Among z>=4.0 Quasars: II. Constraints on the 4.0<z<4.5 Quasar Population
Gordon T. Richards, Zoltan Haiman, Bartosz Pindor +7
We report on i-band snapshot observations of 157 Sloan Digital Sky Survey (SDSS) quasars at 4<z<5.4 using the Advanced Camera for Surveys on the Hubble Space Telescope (HST) to sea…
Evolution and environment of early-type galaxies
M. Bernardi, R. C. Nichol, R. K. Sheth +2
We study the photometric and spectral properties of 39320 early-type galaxies within the SDSS, as a function of both local environment and redshift. The distance to the nearest clu…
Candidate spectroscopic binaries in the Sloan Digital Sky Survey
D. Pourbaix, G. R. Knapp, P. Szkody +11
We have examined the radial velocity data for stars spectroscopically observed by the Sloan Digital Sky Survey (SDSS) more than once to investigate the incidence of spectroscopic b…