Search Publications
Cosmos Photometric Redshifts with 30-Bands for 2-deg2
Kneib, J. -P.; Aussel, H.; Le Floc'h, E. +60 more
We present accurate photometric redshifts (photo-z) in the 2-deg2 COSMOS field. The redshifts are computed with 30 broad, intermediate, and narrowbands covering the UV (Galaxy Evolution Explorer), visible near-IR (NIR; Subaru, Canada-France-Hawaii Telescope (CFHT), United Kingdom Infrared Telescope, and National Optical Astronomy Observ…
Structure and Formation of Elliptical and Spheroidal Galaxies
Kormendy, John; Bender, Ralf; Fisher, David B. +1 more
New surface photometry of all known elliptical galaxies in the Virgo cluster is combined with published data to derive composite profiles of brightness, ellipticity, position angle, isophote shape, and color over large radius ranges. These provide enough leverage to show that Sérsic log I vprop r 1/n functions fit the brightness profil…
Detection of Quiescent Galaxies in a Bicolor Sequence from Z = 0-2
Franx, Marijn; Labbé, Ivo; van Dokkum, Pieter +2 more
We investigate the properties of quiescent and star-forming galaxy populations to z ~ 2 with purely photometric data, employing a novel rest-frame color-selection technique. From the UKIDSS Ultra-Deep Survey Data Release 1, with matched optical and mid-infrared photometry taken from the Subaru-XMM Deep Survey and Spitzer Wide-Area Infrared Extraga…
A Unified Representation of Gas-Phase Element Depletions in the Interstellar Medium
Jenkins, Edward B.
A study of gas-phase element abundances reported in the literature for 17 different elements sampled over 243 sight lines in the local part of our Galaxy reveals that the depletions into solid form (dust grains) are extremely well characterized by trends that employ only three kinds of parameters. One is an index that describes the overall level o…
A Redetermination of the Hubble Constant with the Hubble Space Telescope from a Differential Distance Ladder
Ferguson, Henry C.; Casertano, Stefano; Filippenko, Alexei V. +8 more
This is the second of two papers reporting results from a program to determine the Hubble constant to ~5% precision from a refurbished distance ladder based on extensive use of differential measurements. Here we report observations of 240 Cepheid variables obtained with the Near-Infrared Camera and Multi-Object Spectrometer (NICMOS) Camera 2 throu…
The death of massive stars - I. Observational constraints on the progenitors of Type II-P supernovae
Smartt, S. J.; Maund, J. R.; Eldridge, J. J. +1 more
We present the results of a 10.5-yr, volume-limited (28-Mpc) search for supernova (SN) progenitor stars. In doing so we compile all SNe discovered within this volume (132, of which 27 per cent are Type Ia) and determine the relative rates of each subtype from literature studies. The core-collapse SNe break down into 59 per cent II-P and 29 per cen…
First-Year Sloan Digital Sky Survey-II Supernova Results: Hubble Diagram and Cosmological Parameters
Filippenko, Alexei V.; Pan, Kaike; Schneider, Donald P. +43 more
We present measurements of the Hubble diagram for 103 Type Ia supernovae (SNe) with redshifts 0.04 < z < 0.42, discovered during the first season (Fall 2005) of the Sloan Digital Sky Survey-II (SDSS-II) Supernova Survey. These data fill in the redshift "desert" between low- and high-redshift SN Ia surveys. Within the framework of the MLCS2K2…
Ubiquitous Outflows in DEEP2 Spectra of Star-Forming Galaxies at z = 1.4
Weiner, Benjamin J.; Conselice, Christopher J.; Faber, S. M. +10 more
Galactic winds are a prime suspect for the metal enrichment of the intergalactic medium (IGM) and may have a strong influence on the chemical evolution of galaxies and the nature of QSO absorption-line systems. We use a sample of 1406 galaxy spectra at z ~ 1.4 from the DEEP2 redshift survey to show that blueshifted Mg IYI λλ 2796, 2803 absorption …
The Radius-Luminosity Relationship for Active Galactic Nuclei: The Effect of Host-Galaxy Starlight on Luminosity Measurements. II. The Full Sample of Reverberation-Mapped AGNs
Peterson, Bradley M.; Pogge, Richard W.; Vestergaard, Marianne +2 more
We present high-resolution Hubble Space Telescope images of all 35 active galactic nuclei (AGNs) with optical reverberation-mapping results, which we have modeled to create a nucleus-free image of each AGN host galaxy. From the nucleus-free images, we determine the host-galaxy contribution to ground-based spectroscopic luminosity measurements at 5…
The ACS Nearby Galaxy Survey Treasury
de Jong, Roelof S.; Skillman, Evan D.; Williams, Benjamin F. +24 more
The ACS Nearby Galaxy Survey Treasury (ANGST) is a systematic survey to establish a legacy of uniform multi-color photometry of resolved stars for a volume-limited sample of nearby galaxies (D < 4 Mpc). The survey volume encompasses 69 galaxies in diverse environments, including close pairs, small and large groups, filaments, and truly isolated…