Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21343914m&link_type=abstract
American Astronomical Society, AAS Meeting #213, #439.14; Bulletin of the American Astronomical Society, Vol. 41, p.316
Astronomy and Astrophysics
Astronomy
Scientific paper
In analyzing 8μm-emission from the GLIMPSE survey (Benjamin et al. 2003), Churchwell et. al (2006) identified bubbles of diffuse emission which were partially or fully closed. They argued this structure is largely due to excitation of PAH molecules and that they are formed by O/early-B stars that are pushing away their surrounding gas. If the surrounding gas is compressed as it is being pushed it may become gravitationally unstable possibly forming stars. 50 bubbles were selected from the catalog by Churchwell et al. (2006) for further study. We used the 2MASS Second Incremental Release Point Source Catalog and the GLIMPSE point-source catalog. We fit J-band to 8μm photometry with Monte-Carlo numerical models constructed by Robitaille et al. (2006). Observations were made on the YSO densities and distribution around the bubbles. A numerical simulation was also built and compared to the results.
Mengistu Abel
Watson Christer
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