Revealing the ``missing' low-mass stars in the S255/S257 star forming region

Details Revealing the ``missing' low-mass stars in the S255/S257 star forming region Revealing the ``missing' low-mass stars in the S255/S257 star forming region

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cxo..prop.2758p&link_type=abstract

Chandra proposal ID #11200095

Computer Science

Scientific paper

In the S255/S257 star forming region a dense cluster of young stellar objects is sandwiched between two HII regions. Interestingly, the exciting stars of the HII regions have no clusters of lower-mass stars around them, suggesting perhaps that these massive stars formed in isolation. If, however, these B0 stars are several Myr older than the embedded cluster, associated low-mass stars should be loosely scattered around them. Chandra is the ideal tool to uncover these young stars and to discern them from unrelated field stars by their strongly elevated X-ray emission. Chandra will provide a comprehensive census of young low-mass stars and reveal their spatial distribution, which will allow us to decide between the different proposed star formation scenarios for the S255/S257 region.

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