Showing 2011 · astro-ph.GAShow all

12 papers · 2 filters

astro-ph.GA2011★ 146 cited

G0.253+0.016: a molecular cloud progenitor of an Arches-like cluster

Steven N. Longmore, Jill Rathborne, Nate Bastian +20

Young massive clusters (YMCs) with stellar masses of 10^4 - 10^5 Msun and core stellar densities of 10^4 - 10^5 stars per cubic pc are thought to be the `missing link' between open…

astro-ph.GA2011★ 60 cited

Spitzer IRS Detection of Molecular Hydrogen Rotational Emission Towards Translucent Clouds

James G. Ingalls, T. M. Bania, F. Boulanger +3

Using the Infrared Spectrograph on board the Spitzer Space Telescope, we have detected emission in the S(0), S(1), and S(2) pure-rotational (v=0-0) transitions of molecular hydroge…

astro-ph.GA2011

Exploring the Variable Sky with LINEAR. I. Photometric Recalibration with SDSS

Branimir Sesar, J. Scott Stuart, Željko Ivezić +3

We describe photometric recalibration of data obtained by the asteroid survey LINEAR. Although LINEAR was designed for astrometric discovery of moving objects, the dataset describe…

astro-ph.GA2011★ 153 cited

The Millimeter Astronomy Legacy Team 90 GHz (MALT90) Pilot Survey

Jonathan B. Foster, James M. Jackson, Elizabeth Barris +11

We describe a pilot survey conducted with the Mopra 22-m radio telescope in preparation for the Millimeter Astronomy Legacy Team Survey at 90 GHz (MALT90). We identified 182 candid…

astro-ph.GA2011★ 163 cited

The Magnetic Field in Taurus Probed by Infrared Polarization

Nicholas L. Chapman, Paul F. Goldsmith, Jorge L. Pineda +3

We present maps of the plane-of-sky magnetic field within two regions of the Taurus molecular cloud: one in the dense core L1495/B213 filament, the other in a diffuse region to the…

astro-ph.GA2011★ 99 cited

The Turbulence Spectrum of Molecular Clouds in the Galactic Ring Survey: A Density-Dependent PCA Calibration

Julia Roman-Duval, Christoph Federrath, Christopher Brunt +3

Turbulence plays a major role in the formation and evolution of molecular clouds. The problem is that turbulent velocities are convolved with the density of an observed region. To…

astro-ph.GA2011★ 131 cited

A Chemical Abundance Study of 10 Open Clusters Based on WIYN-Hydra Spectroscopy

H. R. Jacobson, C. A. Pilachowski, E. D. Friel

We present a detailed chemical abundance study of evolved stars in 10 open clusters based on Hydra multi-object echelle spectra obtained with the WIYN 3.5m telescope. From an analy…

astro-ph.GA2011★ 15 cited

Constraining Galactic Magnetic Field Models with Starlight Polarimetry

Michael D. Pavel

This paper provides testable predictions about starlight polarizations to constrain the geometry of the Galactic magnetic field, in particular the nature of the poloidal component.…

astro-ph.GA2011★ 204 cited

HII Region Metallicity Distribution in the Milky Way Disk

Dana S. Balser, Robert T. Rood, T. M. Bania +1

The distribution of metals in the Galaxy provides important information about galaxy formation and evolution. HII regions are the most luminous objects in the Milky Way at mid-infr…

astro-ph.GA2011★ 232 cited

The Green Bank Telescope HII Region Discovery Survey II. The Source Catalog

L. D. Anderson, T. M. Bania, Dana S. Balser +1

The Green Bank Telescope HII Region Discovery Survey has doubled the number of known HII regions in the Galactic zone 343deg.\leql\leq67deg. with |b|\leq1deg. We detected 603 discr…

astro-ph.GA2011★ 83 cited

Emission from Hot Dust in the Infrared Spectra of Gamma-ray Bright Blazars

Michael Malmrose, Alan Marscher, Svetlana Jorstad +2

A possible source of -ray photons observed from the jets of blazars is inverse Compton scattering by relativistic electrons of infrared seed photons from a hot, dusty torus in t…

astro-ph.GA2011★ 57 cited

Using M Dwarf Spectra to Map Extinction in the Local Galaxy

David O. Jones, Andrew A. West, Jonathan B. Foster

We use spectra of more than 56,000 M dwarfs from the Sloan Digital Sky Survey (SDSS) to create a high-latitude extinction map of the local Galaxy. Our technique compares spectra fr…