Other
Scientific paper
Jun 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20127w&link_type=abstract
Spitzer Proposal ID #20127
Other
Scientific paper
The only cluster within 2 kpc of the Sun containing over 1000 stars, other than the ONC, is RCW 38 (Lada & Lada 2003). We propose to observe this nearby (1.7 kpc), very dense and deeply embedded star forming region with IRAC and MIPS. Our deep Chandra observation has detected point-like X-ray emission from a few hundred embedded stars and diffuse X-ray emission from a stellar wind driven by the central O5 star. Our radio and VLT data show a complex and compact core region with several hundred stars encased in warm dust several parsecs in extent. By combining our X-ray, near-IR and radio data with data from Spitzer we will (1) trace the full extent of the population, to understand the sequence of events and current activity within the region -- in particular we will investigate the timescale of disk clearing and the effect of the massive stars on the disks of the low mass stars; (2) examine the relationship among the ionizing plasma, the molecular gas, radio continuum emission and diffuse mid-infrared emission; and (3) investigate the population of deeply embedded hard X-ray sources in our Chandra observations not detected in the near-infrared, which may be a population of protostars.
Bourke Tyler
Megeath Thomas S.
Wolk Scott
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