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16 papers · 2 filters
Accelerating expansion of the universe may be caused by inhomogeneities
Gyula Bene, Viktor Czinner, Matyas Vasuth
We point out that, due to the nonlinearity of the Einstein equations, a homogeneous approximation in cosmology leads to the appearance of an additional term in the Friedmann equati…
Sensitivity of the C and O production on the 3-alpha rate
H. Schlattl, A. Heger, H. Oberhummer +2
We investigate the dependence of the carbon and oxygen production in stars on the 3-alpha rate by varying the energy of the 02+-state of 12C and determine the resulting yields for…
Angular Clustering with Photometric Redshifts in the Sloan Digital Sky Survey: Bimodality in the Clustering Properties of Galaxies
Tamas Budavari, Andrew J. Connolly, Alexander S. Szalay +18
Understanding the clustering of galaxies has long been a goal of modern observational cosmology. Utilizing our photometric redshift technique a volume limited sample containing mor…
The First Data Release of the Sloan Digital Sky Survey
The SDSS collaboration, Kevork Abazajian
The Sloan Digital Sky Survey has validated and made publicly available its First Data Release. This consists of 2099 square degrees of five-band (u, g, r, i, z) imaging data, 186,2…
Probing the Edge of the Solar System: Formation of an Unstable Jet-Sheet
M. Opher, P. C. Liewer, T. I. Gombosi +4
The Voyager spacecraft is now approaching the edge of the solar system. Near the boundary between the solar system and the interstellar medium we find that an unstable ``jet-sheet'…
Red and Reddened Quasars in the Sloan Digital Sky Survey
Gordon T. Richards, Patrick B. Hall, Daniel E. Vanden Berk +12
We investigate the continuum and emission line properties of 4576 SDSS quasars as a function of their optical/UV SEDs. The optical/UV color distribution of our sample is roughly Ga…