Home      Library      Discussions      About
Join us

@astro.umn.edu

Feb 16, 2014

Distance Determinations to SHIELD Galaxies from HST Imaging

The Survey of HI in Extremely Low-mass Dwarf galaxies (SHIELD) is an on-going multi-wavelength program to characterize the gas, star formation, and e…
May 20, 2016

Carbon and Oxygen Abundances in Low Metallicity Dwarf Galaxies

The study of carbon and oxygen abundances yields information on the time evolution and nucleosynthetic origins of these elements, yet remains relativ…
Mar 24, 2016

Testing DARKexp against energy and density distributions of Millenn…

We test the DARKexp model for relaxed, self-gravitating, collisionless systems against equilibrium dark matter halos from the Millennium-II simulatio…
Mar 26, 2009

Asteroid Distributions in the Ecliptic

We present analysis of the asteroid surface density distribution of main belt asteroids (mean perihelion $\Delta \simeq 2.404$ AU) in five ecliptic l…
Jan 29, 2015

Characterizing the Star Formation of the Low-Mass SHIELD Galaxies fro…

The Survey of HI in Extremely Low-mass Dwarfs (SHIELD) is an on-going multi-wavelength program to characterize the gas, star formation, and evolution…
Nov 17, 2007

Inflows and Outflows in the Dwarf Starburst Galaxy NGC 5253: High-R…

VLA and Parkes 64 m radiotelescope 21-cm observations of the starburst dwarf galaxy NGC 5253 reveal a multi-component non-axisymmetric HI distributio…
Jun 23, 2010

Rectified Asteroid Albedos and Diameters from IRAS and MSX

Rectified diameters and albedo estimates of 1517 main belt asteroid selected from the IRAS and MSX asteroid photometry catalogues are derived from up…
Aug 31, 2013

The primordial helium abundance from updated emissivities

Observations of metal-poor extragalactic H II regions allow the determination of the primordial helium abundance, Y_p. The He I emissivities are the …
Jan 26, 2017

WOMBAT: A Scalable and High Performance Astrophysical MHD Code

We present a new code for astrophysical magneto-hydrodynamics specifically designed and optimized for high performance and scaling on modern and futu…
Apr 22, 2014

ALFALFA Discovery of the Nearby Gas-rich Dwarf Galaxy Leo P. V. Neutr…

We present new HI spectral line imaging of the extremely metal-poor, star-forming dwarf irregular galaxy Leo P. Our HI images probe the global neutra…
Apr 23, 2007

The M33 Variable Star Population Revealed by Spitzer

We analyze five epochs of Spitzer Space Telescope/Infrared Array Camera (IRAC) observations of the nearby spiral galaxy M33. Each epoch covered nearl…
Aug 08, 2017

Panchromatic Hubble Andromeda Treasury. XIX. The Ancient Star Formati…

We map the star formation history across M31 by fitting stellar evolution models to color-magnitude diagrams of each 83$''{\times}$83$''$ (0.3$\times…
Sep 17, 2007

The Neon Abundance in the Ejecta of QU Vul From Late-Epoch IR Spectra

We present ground-based SpectroCam-10 mid-infrared, MMT optical, and Spitzer Space Telescope IRS mid-infrared spectra taken 7.62, 18.75, and 19.38 ye…
Oct 31, 2011

The Fundamental Surface of Quad Lenses

In a quadruply imaged lens system the angular distribution of images around the lens center is completely described by three relative angles. We show…
Apr 04, 2011

The M81 Group Dwarf Irregular Galaxy DDO 165. I. High Velocity Neutra…

We present new multi-configuration VLA HI spectral line observations of the M81 group dIrr post-starburst galaxy DDO 165. The HI morphology is comple…
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…
There aren't more papers

Request Comment

or Invite via email
You are asking your first question!
How to quickly get a good answer:
  • Keep your question short and to the point
  • Check for grammar or spelling errors.
  • Phrase it like a question
Test
Test description