Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725114l&link_type=abstract
American Astronomical Society, AAS Meeting #217, #251.14; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
In previous work, we identified 40 star-forming complexes (SFCs) in the 13 most luminous WMAP free-free sources, using Spitzer GLIMPSE and Midcourse Space Experiment surveys. The bubbles were interpreted as an evidence of radial expansion due to a central massive star cluster. The high free-free luminosity and negligible synchroton radiation demonstrated that the initial driver of the bubbles were not supernovae. Meanwhile, the energy injected into the interstellar medium by the bubbles was found to be similar to that required to maintain turbulent motion in the gas disk inside 8 kpc. In this work we report the identification of approximately 200 new SFCs in the 83 WMAP free-free sources using a combination of bubble morphology in 8 micron emission, radio recombination, and molecular line radial velocities. We also recover approximately 80% of the previously found 40 SFCs. We determine the expansion velocity, physical distance, and radius for all the complexes. We report their expansion kinetic energy and its relation to turbulent motion in the interstellar medium.
Lee Eve J.
Murray Nathan
Rahman Moshiur Md.
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