Cluster Formation in Isolation: Spitzer's View of Bok Globule CB 34

Details Cluster Formation in Isolation: Spitzer's View of Bok Globule CB 34 Cluster Formation in Isolation: Spitzer's View of Bok Globule CB 34

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20910520p&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #105.20; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Recent surveys of stars forming over entire molecular clouds have shown that the majority of stars form in clusters (e.g. Carpenter 2000, Allen et al. 2006). Therefore it has become increasingly important to observe and understand star formation in the clustered environment. A sample of young stellar clusters of varying stellar densities has been surveyed with the Spitzer Space Telescope. However, most of these clusters are parts of larger star formation complexes, and may be influenced by external forces such as radiation and winds from neighboring OB stars. CB 34 is an example of a Bok globule, an optically opaque small dark cloud, that harbors a small group of stars forming in relative isolation. Based on initial analysis of 1-8 µm photometry from IRAC and the Two Micron All Sky Survey (2MASS), we identified 9 Class 0/I and 14 Class II young stellar objects within the small, 4.5' x 4.5' region encompassing CB 34. This unusually high number of protostars compared with Class II sources is particularly intriguing because it implies a high rate of star formation. Therefore we have begun a larger study of this region in order to determine why and how CB 34 started forming stars at such a high rate.

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