Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21813006d&link_type=abstract
American Astronomical Society, AAS Meeting #218, #130.06; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
A study was conducted to search for evidence of triggered star formation in six galactic H II regions with suggestive "bubble” morphology in a range of apparent evolutionary states. Young Stellar Objects (YSOs) in these regions were identified from the GLIMPSE point source catalog. Photometric data covering 1.25 μm to 24 μm wavelengths with the 2MASS survey and the Spitzer Space Telescope GLIMPSE and MIPSGAL surveys (utilizing the IRAC and MIPS instruments, respectively) was obtained for each source. The identification was performed by fitting the spectral energy distributions of each source with a collection of previously published YSO radiative transfer models. This method allows for an estimate of each YSO's physical characteristics from the parameters of the models, including mass, luminosity, evolutionary stage, and age. The physical environments were analyzed using CO data from the Boston University Galactic Ring Survey and radio continuum data from the VLA Galactic Plane Survey and the Nobeyama 3 cm Survey. The ages of the H II regions are estimated from the physical characteristics of the region. Finally, the spatial distribution of YSOs and the timescales of YSO formation and H II region expansion are assessed for consistency or discrepancy with the collect and collapse and radiatively driven implosion models of triggered star formation.
This work is based [in part] on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech.
Brogan Crystal
Dirienzo William Joseph
Indebetouw Remy
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