Search Publications
Toward Understanding the Environment of R Monocerotis from High-Resolution Near-Infrared Polarimetric Observations
Doyon, R.; Bastien, P.; Lafrenière, D. +3 more
High-resolution H-band imaging polarimetric observations of R Mon obtained at the Canada-France-Hawaii telescope are presented. These data show a centrosymmetric pattern with elongated intensity contours mostly due to the presence of the companion R Mon B. We also consider published R-band data, which show an extended right-angle conical reflectio…
Observations of Chromospheric Flare Re-brightenings
Veronig, A. M.; Vršnak, B.; Bárta, M. +1 more
We investigate an active region that produced three C-class flares and one M-class flare within 2.5 hr. The morphology and location of the C-flares indicate that these events constitute a set of homologous flares. Radio observations indicate the occurrence of a downward-moving plasmoid during the impulsive phase of the M flare. We use TRACE 1700 Å…
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…
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…
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 Evolution of the Stellar Mass Function of Galaxies from z = 4.0 and the First Comprehensive Analysis of its Uncertainties: Evidence for Mass-Dependent Evolution
van Dokkum, Pieter G.; Franx, Marijn; Labbé, Ivo +3 more
We present the evolution of the stellar mass function (SMF) of galaxies from z = 4.0 to z = 1.3 measured from a sample constructed from the deep near-infrared Multi-wavelength Survey by Yale-Chile, the Faint Infrared Extragalactic Survey, and the Great Observatories Origins Deep Survey-Chandra Deep Field South surveys, all having very high-quality…
A Temperature and Abundance Retrieval Method for Exoplanet Atmospheres
Seager, S.; Madhusudhan, N.
We present a new method to retrieve molecular abundances and temperature profiles from exoplanet atmosphere photometry and spectroscopy. We run millions of one-dimensional (1D) atmosphere models in order to cover the large range of allowed parameter space. In order to run such a large number of models, we have developed a parametric pressure-tempe…