Search Publications
A theory of dark matter
Arkani-Hamed, Nima; Finkbeiner, Douglas P.; Slatyer, Tracy R. +1 more
We propose a comprehensive theory of dark matter that explains the recent proliferation of unexpected observations in high-energy astrophysics. Cosmic ray spectra from ATIC and PAMELA require a WIMP (weakly interacting massive particle). with mass Mχ∼500 800GeV that annihilates into leptons at a level well above that expected from a the…
The Spitzer c2d Legacy Results: Star-Formation Rates and Efficiencies; Evolution and Lifetimes
Myers, Philip C.; Dunham, Michael M.; Alcalá, Juan M. +15 more
The c2d Spitzer Legacy project obtained images and photometry with both IRAC and MIPS instruments for five large, nearby molecular clouds. Three of the clouds were also mapped in dust continuum emission at 1.1 mm, and optical spectroscopy has been obtained for some clouds. This paper combines information drawn from studies of individual clouds int…
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…
Astrophysical Gyrokinetics: Kinetic and Fluid Turbulent Cascades in Magnetized Weakly Collisional Plasmas
Quataert, E.; Howes, G. G.; Schekochihin, A. A. +4 more
This paper presents a theoretical framework for understanding plasma turbulence in astrophysical plasmas. It is motivated by observations of electromagnetic and density fluctuations in the solar wind, interstellar medium and galaxy clusters, as well as by models of particle heating in accretion disks. All of these plasmas and many others have turb…
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…
The CoRoT satellite in flight: description and performance
Guterman, P.; Auvergne, M.; Jorda, L. +107 more
Context: CoRoT is a space telescope dedicated to stellar seismology and the search for extrasolar planets. The mission is led by the CNES in association with French laboratories and has a large international participation. The European Space Agency (ESA), Austria, Belgium, and Germany contribute to the payload, and Spain and Brazil contribute to t…