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A mid-infrared census of star formation activity in Bolocam Galactic plane survey sources

Dunham, Miranda K., Robitaille, Thomas P., Evans II, Neal J., Schlingman, Wayne M., Cyganowski, Claudia J., Urquhart, J.S. (2011) A mid-infrared census of star formation activity in Bolocam Galactic plane survey sources. Astrophysical Journal, 731 (2). p. 90. ISSN 0004637X (ISSN). (doi:10.1088/0004-637X/731/2/90) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://www.dx.doi.org/10.1088/0004-637X/731/2/90

Abstract

We present the results of a search for mid-infrared signs of star formation activity in the 1.1 mm sources in the Bolocam Galactic Plane Survey (BGPS). We have correlated the BGPS catalog with available mid-IR Galactic plane catalogs based on the Spitzer Space Telescope GLIMPSE legacy survey and the Midcourse Space Experiment (MSX) Galactic plane survey. We find that 44% (3712 of 8358) of the BGPS sources contain at least one mid-IR source, including 2457 of 5067 (49%) within the area where all surveys overlap (10° < ? < 65°). Accounting for chance alignments between the BGPS and mid-IR sources, we conservatively estimate that 20% of the BPGS sources within the area where all surveys overlap show signs of active star formation. We separate the BGPS sources into four groups based on their probability of star formation activity. Extended Green Objects and Red MSX Sources make up the highest probability group, while the lowest probability group is comprised of "starless" BGPS sources which were not matched to any mid-IR sources. The mean 1.1 mm flux of each group increases with increasing probability of active star formation. We also find that the "starless" BGPS sources are the most compact, while the sources with the highest probability of star formation activity are on average more extended with large skirts of emission. A subsample of 280 BGPS sources with known distances demonstrates that mass and mean H2 column density also increase with probability of star formation activity.

Item Type: Article
DOI/Identification number: 10.1088/0004-637X/731/2/90
Uncontrolled keywords: dust, extinction, infrared: stars, ISM: clouds, stars: formation
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: James Urquhart
Date Deposited: 30 Nov 2015 16:03 UTC
Last Modified: 29 May 2019 16:28 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/52224 (The current URI for this page, for reference purposes)
Urquhart, J.S.: https://orcid.org/0000-0002-1605-8050
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