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High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data V. Hobby-Eberly Telescope Observations
Donald P. Schneider, Xiaohui Fan, Michael A. Strauss +5
We report the discovery of 27 quasars with redshifts between 3.58 and 4.49. The objects were identified as high-redshift candidates based on their colors in Sloan Digital Sky Surve…
Towards a Precise Measurement of Matter Clustering: Lyman-alpha Forest Data at Redshifts 2-4
Rupert A. C. Croft, David H. Weinberg, Mike Bolte +5
We measure the filling factor, correlation function, and power spectrum of transmitted flux in a large sample of Lya forest spectra, comprised of 30 Keck HIRES spectra and 23 Keck…
The Luminosity Function of Galaxies in SDSS Commissioning Data
SDSS Collaboration, M. R. Blanton
During commissioning observations, the Sloan Digital Sky Survey (SDSS) has produced one of the largest existing galaxy redshift samples selected from CCD images. Using 11,275 galax…
Hydrodynamic Simulation of the Cosmological X-ray Background
Rupert A. C. Croft, Tiziana Di Matteo, Romeel Dav'e +4
(Abridged) We use a hydrodynamic simulation of a LambdaCDM model to predict the extragalactic X-ray background (XRB), focussing on emission from the intergalactic medium (IGM). We…
High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data IV: Luminosity Function from the Fall Equatorial Stripe Sampl
X. Fan, M. A. Strauss, D. P. Schneider +7
This is the fourth paper in a series aimed at finding high-redshift quasars from five-color imaging data taken along the Celestial Equator by the SDSS. during its commissioning pha…
High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data III: A Color Selected Sample at i^*<20 in the Fall Equatorial Stripe
X. Fan, M. A. Strauss, G. T. Richards +7
This is the third paper in a series aimed at finding high-redshift quasars from five-color (u'g'r'i'z') imaging data taken along the Celestial Equator by the SDSS during its commis…
Biased Galaxy Formation And Measurements Of Beta
Andreas A. Berlind, Vijay K. Narayanan, David H. Weinberg
Measurements of the cosmological density parameter Omega using techniques that exploit the gravity-induced motions of galaxies constrain, in linear perturbation theory, the degener…
Hierarchical galaxy formation and substructure in the Galaxy's stellar halo
James S. Bullock, Andrey V. Kravtsov, David H. Weinberg
We develop an explicit model for the formation of the stellar halo from tidally disrupted, accreted dwarf satellites in the cold dark matter (CDM) framework, focusing on prediction…
Baryons in the Warm-Hot Intergalactic Medium
Romeel Davé, Renyue Cen, Jeremiah P. Ostriker +6
Approximately 30-40% of all baryons in the present day universe reside in a warm-hot intergalactic medium (WHIM), with temperatures between 10^5<T<10^7 K. This is a generic predict…
Cooling Radiation and the Lyman-alpha Luminosity of Forming Galaxies
Mark A. Fardal, Neal Katz, Jeffrey P. Gardner +3
We examine the cooling radiation from forming galaxies in hydrodynamic simulations of the LCDM model (cold dark matter with a cosmological constant), focusing on the Ly-alpha line…
The Sloan Digital Sky Survey: Technical Summary
D. G. York
The Sloan Digital Sky Survey (SDSS) will provide the data to support detailed investigations of the distribution of luminous and non- luminous matter in the Universe: a photometric…
High-Redshift Galaxies in Cold Dark Matter Models
David H. Weinberg, Lars Hernquist, Neal Katz
We use hydrodynamic cosmological simulations to predict the star formation properties of high-redshift galaxies (z=2-6) in five variants of the inflationary cold dark matter scenar…
Reionization and the abundance of galactic satellites
James S. Bullock, Andrey V. Kravtsov, David H. Weinberg
One of the main challenges facing standard hierarchical structure formation models is that the predicted abundance of galactic subhalos with circular velocities of 10-30 km/s is an…
Quasar Clustering and the Lifetime of Quasars
Paul Martini, David H. Weinberg
Although the population of luminous quasars rises and falls over a period of 10^9 years, the typical lifetime of individual quasars is uncertain by several orders of magnitude. We…
Biased Estimates of Omega from Comparing Smoothed Predicted Velocity Fields to Unsmoothed Peculiar Velocity Measurements
Andreas A. Berlind, Vijay K. Narayanan, David H. Weinberg +1
We show that a regression of unsmoothed peculiar velocity measurements against peculiar velocities predicted from a smoothed galaxy density field leads to a biased estimate of the…
Constraints on Cosmological Parameters from the Lyman-alpha Forest Power Spectrum and COBE-DMR
John Phillips, David H. Weinberg, Rupert A. C. Croft +3
We combine COBE-DMR measurements of cosmic microwave background anisotropy with a recent measurement of the mass power spectrum at redshift z=2.5 from Lya forest data to derive con…