Showing 2013 · astro-ph.GAShow all

17 papers · 2 filters

astro-ph.GA2013★ 36 cited

First hard X-ray detection of the non-thermal emission around the Arches cluster: morphology and spectral studies with NuSTAR

Roman A. Krivonos, John A. Tomsick, Franz E. Bauer +15

The Arches cluster is a young, densely packed massive star cluster in our Galaxy that shows a high level of star formation activity. The nature of the extended non-thermal X-ray em…

astro-ph.GA2013★ 229 cited

Magnetically Aligned HI Fibers and the Rolling Hough Transform

S E Clark, J E G Peek, M E Putman

We present observations of a new group of structures in the diffuse Galactic ISM: slender, linear HI features we dub "fibers" that extend for many degrees at high Galactic latitude…

astro-ph.GA2013★ 35 cited

The Diffuse Galactic Far-Ultraviolet Sky

Erika Hamden, David Schiminovich, Mark Seibert

We present an all sky map of the diffuse Galactic far ultraviolet (1344-1786 Angstroms) background using GALEX data, covering 65% of the sky with 11.79 arcmin square pixels. We inv…

astro-ph.GA2013★ 22 cited

The Dust Scattering Halo of Cygnus X-3

Lia Corrales, Frits Paerels

Dust grains scatter X-ray light through small angles, producing a diffuse halo image around bright X-ray point sources situated behind a large amount of interstellar material. We p…

astro-ph.GA2013★ 50 cited

Evidence for an Interaction in the Nearest Starbursting Dwarf Irregular Galaxy IC 10

David L. Nidever, Trisha Ashley, Colin T. Slater +10

Using deep 21-cm HI data from the Green Bank Telescope we have detected an ~18.3 kpc-long gaseous extension associated with the starbursting dwarf galaxy IC 10. The newly-found fea…

astro-ph.GA2013★ 24 cited

Characterizing the Turbulent Properties of the Starless Molecular Cloud MBM16

Nickolas M. Pingel, Snezana Stanimirovic, J. E. G. Peek +13

We investigate turbulent properties of the non-star-forming, translucent molecular cloud, MBM16 by applying the statistical technique of a two-dimensional spatial power spectrum (S…

astro-ph.GA2013★ 65 cited

Found: The Progenitors of AM CVn and Supernovae .Ia

Mukremin Kilic, J. J. Hermes, A. Gianninas +7

We present optical and X-ray observations of two tidally distorted, extremely low-mass white dwarfs (WDs) with massive companions. There is no evidence of neutron stars in our Chan…

astro-ph.GA2013★ 42 cited

Discovery of a Dynamical Cold Point in the Heart of the Sagittarius dSph Galaxy with Observations from the APOGEE Project

Steven R. Majewski, Sten Hasselquist, Ewa L. Łokas +30

The dynamics of the core of the Sagittarius (Sgr) dwarf spheroidal (dSph) galaxy are explored using high-resolution (R~22,500), H-band, near-infrared spectra of over 1,000 giant st…

astro-ph.GA2013★ 45 cited

Constraining the Milky Way Halo Shape Using Thin Streams

H. Lux, J. I. Read, G. Lake +1

Tidal streams are a powerful probe of the Milky Way (MW) potential shape. In this paper, we introduce a simple test particle method to fit stream data, using a Markov Chain Monte C…

astro-ph.GA2013★ 282 cited

The AGORA High-Resolution Galaxy Simulations Comparison Project

Ji-hoon Kim, Tom Abel, Oscar Agertz +43

We introduce the AGORA project, a comprehensive numerical study of well-resolved galaxies within the LCDM cosmology. Cosmological hydrodynamic simulations with force resolutions of…

astro-ph.GA2013★ 12 cited

The Runaway Binary LP 400-22 is Leaving the Galaxy

Mukremin Kilic, A. Gianninas, Warren R. Brown +7

We present optical spectroscopy, astrometry, radio, and X-ray observations of the runaway binary LP 400-22. We refine the orbital parameters of the system based on our new radial v…

astro-ph.GA2013★ 20 cited

A Mass-Dependent Yield Origin of Neutron-Capture Element Abundance Distributions in Ultra-Faint Dwarfs

Duane M. Lee, Kathryn V. Johnston, Jason Tumlinson +2

One way to constrain the nature of the high-redshift progenitors of the Milky Way is to look at the low-metallicity stellar populations of the different Galactic components today.…

astro-ph.GA2013★ 49 cited

Hi Shells and Supershells in the I-GALFA Hi 21-cm Line Survey: I. Fast-Expanding Hi Shells Associated with Supernova Remnants

Geumsook Park, Bon-Chul Koo, Steven J. Gibson +7

We search for fast-expanding Hi shells associated with Galactic supernova remnants (SNRs) in the longitude range l \approx 32\arcdeg to 77\arcdeg using 21-cm line data from the Inn…

astro-ph.GA2013★ 58 cited

Ultraviolet Extinction at High Galactic Latitudes

J. E. G. Peek, David Schiminovich

In order to study the properties and effects of high Galactic latitude dust we present an analysis of 373,303 galaxies selected from the Galaxy Evolution Explorer (GALEX) All-Sky S…

astro-ph.GA2013★ 69 cited

A Pilot for a VLA HI Deep Field

Ximena Fernández, J. H. van Gorkom, Kelley M. Hess +12

High-resolution 21-cm HI deep fields provide spatially and kinematically resolved neutral gas maps at different redshifts, which are key to understanding galaxy evolution across co…

astro-ph.GA2013★ 11 cited

A Comparison of Far IR and HI as Reddening Predictors at High Galactic Latitude

J. E. G. Peek

Both the Galactic 21-cm line flux from neutral hydrogen (HI) in interstellar medium and the far-infrared (FIR) emission from Galactic dust grains have been used to estimate the str…

astro-ph.GA2013★ 27 cited

G2 can Illuminate the Black Hole Population near the Galactic Center

Imre Bartos, Zoltan Haiman, Bence Kocsis +1

Galactic nuclei are expected to be densely populated with stellar and intermediate mass black holes. Exploring this population will have important consequences for the observation…