Astronomy and Astrophysics – Astronomy
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.9602n&link_type=abstract
American Astronomical Society, AAS Meeting #212, #96.02; Bulletin of the American Astronomical Society, Vol. 40, p.271
Astronomy and Astrophysics
Astronomy
Scientific paper
The Bolocam Galactic Plane Survey (BGPS) is an unbiased millimeter survey of approximately 150 square degrees of the northern Galactic Plane. Millimeter continuum emission is an excellent tracer of the cold dust associated with star-forming regions, and the BGPS is identifying thousands of previously unknown sites of star formation. Fundamental physical properties of the star-forming regions such as mass are impossible to measure, however, without knowledge of the distance to the star-forming core. Most BGPS sources were previously undiscovered, so their distances are not known a priori. We have begun using dense molecular tracers such as CS(5-4) and NH3(1,1), (2,2) and (3,3) to derive distance estimates from the observed velocity. In addition to obtaining velocities, the ammonia inversion transitions also allow us to characterize the kinetic temperature and velocity dispersion of the dense gas. In this talk, I will focus on the isolated Gem OB1 outer galaxy field where we have observed all BGPS sources in ammonia.
Bolocam Galactic Plane Collaboration
Nordhaus Miranda K.
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