Search Publications
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…
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…
The Extragalactic Distance Database
Shaya, Edward J.; Tully, R. Brent; Makarov, Dmitry I. +3 more
A database can be accessed on the Web at http://edd.ifa.hawaii.edu that was developed to promote access to information related to galaxy distances. The database has three functional components. First, tables from many literature sources have been gathered and enhanced with links through a distinct galaxy nam…
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…
Self-Consistent Models of the AGN and Black Hole Populations: Duty Cycles, Accretion Rates, and the Mean Radiative Efficiency
Miralda-Escudé, Jordi; Weinberg, David H.; Shankar, Francesco
We construct evolutionary models of the populations of active galactic nuclei (AGNs) and supermassive black holes, in which the black hole mass function grows at the rate implied by the observed luminosity function, given assumptions about the radiative efficiency and the luminosity in Eddington units. We draw on a variety of recent X-ray and opti…
The XMM-Newton serendipitous survey. V. The Second XMM-Newton serendipitous source catalogue
Pietsch, W.; Motch, C.; Brusa, M. +47 more
Aims: Pointed observations with XMM-Newton provide the basis for creating catalogues of X-ray sources detected serendipitously in each field. This paper describes the creation and characteristics of the 2XMM catalogue.
Methods: The 2XMM catalogue has been compiled from a new processing of the XMM-Newton EPIC camera data. The main features of t…
An intermediate-mass black hole of over 500 solar masses in the galaxy ESO243-49
Godet, Olivier; Webb, Natalie A.; Barret, Didier +2 more
Ultraluminous X-ray sources are extragalactic objects located outside the nucleus of the host galaxy with bolometric luminosities exceeding 1039ergs-1. These extreme luminosities-if the emission is isotropic and below the theoretical (Eddington) limit, where the radiation pressure is balanced by the gravitational pressure-imp…
The ACS Fornax Cluster Survey. V. Measurement and Recalibration of Surface Brightness Fluctuations and a Precise Value of the Fornax-Virgo Relative Distance
Jordán, Andrés; Infante, Leopoldo; Tonry, John L. +6 more
We present (g 475 - z 850) color and z 850-band surface brightness fluctuations (SBFs) measurements for 43 early-type galaxies in the Fornax cluster imaged with the Hubble Space Telescope Advanced Camera for Surveys. These are combined with our earlier measurements for Virgo cluster galaxies to derive a revised, no…
Galaxy Zoo Green Peas: discovery of a class of compact extremely star-forming galaxies
Schawinski, Kevin; Keel, William C.; Sarzi, Marc +14 more
We investigate a class of rapidly growing emission line galaxies, known as `Green Peas', first noted by volunteers in the Galaxy Zoo project because of their peculiar bright green colour and small size, unresolved in Sloan Digital Sky Survey imaging. Their appearance is due to very strong optical emission lines, namely [OIII] λ5007Å, with an unusu…
The ACS Survey of Galactic Globular Clusters. VII. Relative Ages
Milone, Antonino P.; Anderson, Jay; Dotter, Aaron +13 more
The ACS Survey of Galactic globular clusters is a Hubble Space Telescope Treasury program designed to provide a new large, deep, and homogeneous photometric database. Based on observations from this program, we have measured precise relative ages for a sample of 64 Galactic globular clusters by comparing the relative position of the clusters' main…