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Dec 16, 2011

An MCMC determination of the primordial helium abundance

Spectroscopic observations of the chemical abundances in metal-poor H II regions provide an independent method for estimating the primordial helium a…
Feb 04, 2009

Water in Comets 71P/Clark and C/2004 B1 (LINEAR) with Spitzer

We present 5.5 to 7.6 micron spectra of comets 71P/Clark (2006 May 27.56 UT, r_h = 1.57 AU pre-perihelion) and C/2004 B1 (LINEAR) (2005 October 15.22…
Jul 21, 2015

Model-free analysis of quadruply imaged gravitationally lensed system…

Multiple image gravitational lens systems, and especially quads are invaluable in determining the amount and distribution of mass in galaxies. This i…
Feb 23, 2010

The ACS LCID Project. II. Faint Variable Stars in the Isolated Dwarf …

(Abridged) We present the results of a new search for variable stars in the Local Group (LG) isolated dwarf galaxy IC1613, based on 24 orbits of F475…
Sep 03, 2014

The Panchromatic Hubble Andromeda Treasury X. Ultraviolet to Infrared…

We have measured stellar photometry with the Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) and Advanced Camera for Surveys (ACS) in near ul…
Nov 21, 2009

The ACS Nearby Galaxy Survey Treasury IV. The Star Formation History …

We present resolved stellar photometry of NGC 2976 obtained with the Advanced Camera for Surveys (ACS) as part of the ACS Nearby Galaxy Survey Treasu…
Nov 16, 2016

The Panchromatic STARBurst IRregular Dwarf Survey (STARBIRDS) Data

Understanding star formation in resolved low mass systems requires the integration of information obtained from observations at different wavelengths…
Apr 04, 2011

The M81 Group Dwarf Irregular Galaxy DDO 165. II. Connecting Recent S…

We compare the stellar populations and complex neutral gas dynamics of the M81 group dIrr galaxy DDO 165 using data from the HST and the VLA. Paper I…
Oct 02, 2010
Statistical Mechanics

Statistical mechanics of collisionless orbits. II. Structure of halos

In this paper, we present the density, \rho, velocity dispersion, \sigma, and \rho/\sigma^3 profiles of isotropic systems which have the energy distr…
Nov 23, 2010

Multiple shock structures in a radio selected cluster of galaxies

We present a new radio-selected cluster of galaxies, 0217+70, using observations from the Very Large Array and archival optical and X-ray data. The n…
Mar 26, 2016

Luminous and Variable Stars in M31 and M33. III. The Yellow and Red …

Recent supernova and transient surveys have revealed an increasing number of non-terminal stellar eruptions. Though the progenitor class of these eru…
Nov 16, 2016

DUSTiNGS III: Distribution of Intermediate-Age and Old Stellar Popu…

We have traced the spatial distributions of intermediate-age and old stars in nine dwarf galaxies in the distant parts of the Local Group, using mult…
May 23, 2007

Self-Similar Evolution of Cosmic-Ray-Modified Quasi-Parallel Plane …

Using an improved version of the previously introduced CRASH (Cosmic Ray Acceleration SHock) code, we have calculated the time evolution of cosmic-ra…
Jun 21, 2007

A Spectroscopic Study of Mass Outflows in the Interacting Binary RY …

The massive interacting binary RY Scuti is an important representative of an active mass-transferring system that is changing before our eyes and whi…
Nov 15, 2017

SPLASH-SXDF Multi-wavelength Photometric Catalog

We present a multi-wavelength catalog in the Subaru-XMM Deep Field (SXDF) as part of the Spitzer Large Area Survey with Hyper-Suprime-Cam (SPLASH). W…
May 12, 2012

Observational Constraints on the Molecular Gas Content in Nearby St…

Using star formation histories derived from optically resolved stellar populations in nineteen nearby starburst dwarf galaxies observed with the Hubb…
Oct 15, 2008

The ACS Nearby Galaxy Survey Treasury I. The Star Formation History o…

The ACS Nearby Galaxy Survey Treasury (ANGST) is a large Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) treasury program to obtain re…
Aug 10, 2015

Non-universality of dark-matter halos: cusps, cores, and the central …

Dark-matter halos grown in cosmological simulations appear to have central NFW-like density cusps with mean values of $d\log\rho/d\log r \approx -1$,…
Dec 14, 2011

Surface mass density of the Einasto family of dark matter haloes: Are…

Recent advances in N-body simulations of dark matter halos have shown that three-parameter models, in particular the Einasto profile characterized by…
Feb 19, 2011

Light/Mass Offsets in the Lensing Cluster Abell 3827: Evidence for …

If dark matter has a non-zero self-interaction cross-section, then dark matter halos of individual galaxies in cluster cores should experience a drag…
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