David H. Weinberg
A5055630635- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Scientific Research and Discoveries
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Astronomical Observations and Instrumentation
- Biochemical Analysis and Sensing Techniques
- Astrophysical Phenomena and Observations
- Regulation of Appetite and Obesity
- Dark Matter and Cosmic Phenomena
- Remote Sensing in Agriculture
- Astro and Planetary Science
- Adaptive optics and wavefront sensing
- melanin and skin pigmentation
- Jewish and Middle Eastern Studies
- Computational Physics and Python Applications
- Solar and Space Plasma Dynamics
- Receptor Mechanisms and Signaling
- History and Developments in Astronomy
- Jewish Identity and Society
- Impact of Light on Environment and Health
The Ohio State University
2016-2025
State Library of Ohio
1996-2025
University of Pennsylvania
1977-2024
Medical University of South Carolina
2024
Institute for Advanced Study
1992-2023
Autodesk (United States)
2021
Eunice Kennedy Shriver National Institute of Child Health and Human Development
2016-2020
National Institutes of Health
2020
University of Oxford
2019
Freenome (United States)
2019
We measure cosmological parameters using the three-dimensional power spectrum $P(k)$ from over 200 000 galaxies in Sloan Digital Sky Survey (SDSS) combination with Wilkinson Microwave Anisotropy Probe (WMAP) and other data. Our results are consistent a ``vanilla'' flat adiabatic cold dark matter model constant without tilt ${(n}_{s}=1),$ running tilt, tensor modes, or massive neutrinos. Adding SDSS information more than halves WMAP-only error bars on some parameters, tightening...
We present cosmological results from the final galaxy clustering data set of Baryon Oscillation Spectroscopic Survey, part Sloan Digital Sky Survey III. Our combined sample comprises 1.2 million massive galaxies over an effective area 9329 deg^2 and volume 18.7 Gpc^3, divided into three partially overlapping redshift slices centred at redshifts 0.38, 0.51, 0.61. measure angular diameter distance DM Hubble parameter H baryon acoustic oscillation (BAO) method after applying reconstruction to...
We develop a new method to constrain the star formation histories, dust attenuation and stellar masses of galaxies. It is based on two absorption-line indices, 4000-Å break strength Balmer index HδA. Together, these indices allow us mean ages galaxies fractional mass formed in bursts over past few Gyr. A comparison with broad-band photometry then yields estimates mass. generate large library Monte Carlo realizations different including starbursts varying range metallicities. use this median...
Building on the legacy of Sloan Digital Sky Survey (SDSS-I and II), SDSS-III is a program four spectroscopic surveys three scientific themes: dark energy cosmological parameters, history structure Milky Way, population giant planets around other stars. In keeping with SDSS tradition, will provide regular public releases all its data, beginning Data Release 8 (DR8), which was made in 2011 January includes SDSS-I SDSS-II images spectra reprocessed latest pipelines calibrations produced for...
We examine the temperature history of gas accreted by forming galaxies in SPH simulations. About half shock heats to roughly virial galaxy potential well before cooling, condensing, and stars, but other radiates its acquired gravitational energy at much lower temperatures, typically T<10^5 K, histogram maximum temperatures is clearly bimodal. The "cold mode" accretion dominates for low mass (M_baryon < 10^{10.3}Msun or M_halo 10^{11.4}Msun), while conventional "hot growth high systems....
We present a one per cent measurement of the cosmic distance scale from detections baryon acoustic oscillations (BAO) in clustering galaxies Baryon Oscillation Spectroscopic Survey, which is part Sloan Digital Sky Survey III. Our results come Data Release 11 (DR11) sample, containing nearly million and covering approximately 8500 square degrees redshift range 0.2 < |$z$| 0.7. also compare these with those publicly released DR9 DR10 samples. Assuming concordance Λ cold dark matter (ΛCDM)...
We describe the algorithm that selects main sample of galaxies for spectroscopy in Sloan Digital Sky Survey from photometric data obtained by imaging survey. Galaxy properties are measured using Petrosian magnitude system, which measures flux apertures determined shape surface brightness profile. The metric aperture used is essentially independent cosmological dimming, foreground extinction, sky brightness, and galaxy central brightness. consists with r-band r < 17.77 half-light 24.5...
The spectroscopic Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7) galaxy sample represents the final set of galaxies observed using original SDSS target selection criteria. We analyse clustering within this sample, including both luminous red and main samples, also include 2-degree Field Galaxy Redshift data. In total, comprises 893 319 over 9100 deg2. Baryon acoustic oscillations (BAO) are in power spectra measured for different slices redshift; allows us to constrain distance–redshift...
We measure the large-scale real-space power spectrum P(k) using a sample of 205,443 galaxies from Sloan Digital Sky Survey, covering 2417 square degrees with mean redshift z~0.1. employ matrix-based method pseudo-Karhunen-Loeve eigenmodes, producing uncorrelated minimum-variance measurements in 22 k-bands both clustering and its anisotropy due to redshift-space distortions, narrow well-behaved window functions range 0.02 h/Mpc < k 0.3h/Mpc. pay particular attention modeling, quantifying...
We measure the large-scale real-space power spectrum $P(k)$ using luminous red galaxies (LRGs) in Sloan Digital Sky Survey (SDSS) and use this measurement to sharpen constraints on cosmological parameters from Wilkinson Microwave Anisotropy Probe (WMAP). employ a matrix-based estimation method Pseudo-Karhunen-Lo\`eve eigenmodes, producing uncorrelated minimum-variance measurements 20 $k$-bands of both clustering its anisotropy due redshift-space distortions, with narrow well-behaved window...
This report describes the 2014 study by Science Definition Team (SDT) of Wide-Field Infrared Survey Telescope (WFIRST) mission. It is a space observatory that will address most compelling scientific problems in dark energy, exoplanets and general astrophysics using 2.4-m telescope with wide-field infrared instrument an optical coronagraph. The Astro2010 Decadal recommended Wide Field as its top priority for new large As conceived decadal survey, WFIRST would carry out energy science program,...
Using a catalog of 147,986 galaxy redshifts and fluxes from the Sloan Digital Sky Survey (SDSS), we measure luminosity density at z = 0.1 in five optical bandpasses corresponding to SDSS shifted match their rest-frame shape 0.1. We denote bands 0.1u, 0.1g, 0.1r, 0.1i, 0.1z with λeff (3216, 4240, 5595, 6792, 8111 Å), respectively. To estimate function, use maximum likelihood method that allows for general form fits simple number evolution, incorporates flux uncertainties, accounts limits...
We combine the constraints from recent Ly$\ensuremath{\alpha}$ forest analysis of Sloan Digital Sky Survey (SDSS) and SDSS galaxy bias with previous clustering, latest supernovae, 1st year WMAP cosmic microwave background anisotropies. find significant improvements on all cosmological parameters compared to constraints, which highlights importance combining other probes. Combining we for primordial slope ${n}_{s}=0.98\ifmmode\pm\else\textpm\fi{}0.02$. see no evidence running,...
We describe the target selection and resulting properties of a spectroscopic sample luminous red galaxies (LRGs) from imaging data Sloan Digital Sky Survey (SDSS). These are selected on basis color magnitude to yield intrinsically that extends fainter farther than main flux-limited portion SDSS galaxy sample. The is designed impose passively evolving luminosity rest-frame cut redshift 0.38. Additional, yet more included ∼0.5. Approximately 12 these per square degree targeted for...
We investigate galaxy bias in the framework of "halo occupation distribution" (HOD), which defines a population galaxies by conditional probability P(N|M) that dark matter halo virial mass M contains N galaxies, together with prescriptions specify relative spatial and velocity distributions within halos. By populating halos cosmological N-body simulation using variety HOD models, we examine sensitivity different clustering statistics to properties HOD. The correlation function responds...
We present the fifth edition of Sloan Digital Sky Survey (SDSS) Quasar Catalog, which is based upon SDSS Seventh Data Release. The catalog, contains 105,783 spectroscopically confirmed quasars, represents conclusion SDSS-I and SDSS-II quasar survey. catalog consists objects that have luminosities larger than M_i = -22.0 (in a cosmology with H_0 70 km/s/Mpc Omega_M 0.3, Omega_Lambda 0.7) at least one emission line FWHM 1000 km/s or interesting/complex absorption features, are fainter i > 15.0...
We present measurements of galaxy clustering from the Baryon Oscillation Spectroscopic Survey (BOSS), which is part Sloan Digital Sky III (SDSS-III). These use Data Release 9 (DR9) CMASS sample, contains 264 283 massive galaxies covering 3275 square degrees with an effective redshift z = 0.57 and range 0.43 < 0.7. Assuming a concordance ΛCDM cosmological model, this sample covers volume 2.2 Gpc3, represents largest Universe ever surveyed at density, . measure angle-averaged correlation...
The halo occupation distribution (HOD) describes the relation between galaxies and dark matter at level of individual halos. properties residing centers halos differ from those satellite because differences in their formation histories. Using a smoothed particle hydrodynamics (SPH) simulation semi-analytic (SA) galaxy model, we examine separate contributions central to HOD, more specifically probability P(N|M) that virial mass M contains N particular class. In agreement with earlier results...
We describe numerical methods for incorporating gas dynamics into cosmological simulations and present illustrative applications to the cold dark matter (CDM) scenario. Our evolution code, a version of TreeSPH (Hernquist \& Katz 1989) generalized handle comoving coordinates periodic boundary conditions, combines smoothed--particle hydrodynamics (SPH) with hierarchical tree method computing gravitational forces. The Lagrangian approach individual time steps particles give algorithm large...
We study the luminosity and color dependence of galaxy two-point correlation function in Sloan Digital Sky Survey, starting from a sample ~200,000 galaxies over 2500 deg2. concentrate our analysis on volume-limited subsamples specified ranges, for which we measure projected wp(rp), is directly related to real-space ξ(r). The amplitude wp(rp) rises continuously with Mr ≈ -17.5 -22.5, most rapid increase occurring above characteristic L* (Mr -20.5). Over scales 0.1 h-1 Mpc < rp 10 Mpc,...
The Apache Point Observatory Galactic Evolution Experiment (APOGEE), one of the programs in Sloan Digital Sky Survey III (SDSS-III), has now completed its systematic, homogeneous spectroscopic survey sampling all major populations Milky Way. After a three year observing campaign on 2.5-m Telescope, APOGEE collected half million high resolution (R~22,500), S/N (>100), infrared (1.51-1.70 microns) spectra for 146,000 stars, with time series information via repeat visits to most these stars....
We measure the luminosity and color dependence of galaxy clustering in largest-ever redshift survey, main sample Sloan Digital Sky Survey Seventh Data Release. focus on projected correlation function wp(rp) volume-limited samples, extracted from parent ∼700,000 galaxies over 8000 deg2, extending up to 0.25. interpret our measurements using halo occupation distribution (HOD) modeling assuming a ΛCDM cosmology (inflationary cold dark matter with cosmological constant). The amplitude grows...