Young Clusters Forming in Isolation

Details Young Clusters Forming in Isolation Young Clusters Forming in Isolation

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725816p&link_type=abstract

American Astronomical Society, AAS Meeting #217, #258.16; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We present preliminary results from a study of a large sample of Bok globules that have been observed with the NASA Spitzer Space Telescope. We identify and classify young stellar objects using Spitzer and near-infrared 2MASS photometry, and will present the ratio of Class I to Class II YSOs in each of the regions. In addition, near-infrared extinction maps will be presented. The stellar populations will be used, along with the known gas masses of these clouds to estimate the fraction of the gas from a molecular cloud that typically ends up as stars. The initial conditions for the formation of a single star, binary or cluster of stars can be constrained, and with an estimate of the age from theoretical models, the time it takes a star (or a cluster of stars) to form can also be constrained, as well as the timescales for the various evolutionary states. Bok globules are unique because they are simple environments, free from the confusing effects of winds and external turbulence that are often seen in young clusters embedded within larger, star-forming complexes. As part of our study, we will compare these simple structures, which span a wide range of evolutionary states, with more complex bright-rimmed clouds, which are strongly influenced by nearby O and B stars, ultimately studying the role of environment in star formation.

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