Statistics
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30223p&link_type=abstract
Spitzer Proposal ID #30223
Statistics
Scientific paper
We have discovered a uniquely rich star-forming region covering ~0.5 sq. degrees in the Serpens molecular cloud using the Cores to Disks (c2d) Legacy program IRAC/MIPS maps. It contains three clusters apparently at different evolutionary stages, suggesting that sequential star formation has taken place. We propose to perform a complete spectroscopic survey of the young stars in the region covering the full luminosity range extending from intermediate-mass young stars down to brown dwarfs with disks. Due to the exceptionally high number of young stars in the region, the sample can be used to derive significant statistics on the physical and chemical properties of young stellar populations of different ages. The sample will therefore provide a calibration of the sequence of disk evolution within a few million years. In particular, the spectra will contain signatures allowing the detailed comparison of grain composition, crystallinity, size distribution as well as physical structure of the disks between different populations of young stars at a range of evolutionary stages from embedded objects to evolved disks with large inner holes. The sample can thus be used as a comparative template for numerous studies of the evolution of young low-mass stars and will help to constrain the timescales for grain growth and clearing of the inner disk regions. The proposed 125 stars with proto-planetary disks include 9 brown dwarf candidates as well as 4 sources with infrared excess, but with photospheric colors out to 10 micron, suggesting the presence of inner gaps in the disks, possibly caused by the presence of new-born planets. Because of the large potential interest from the community, we propose to make the data non-proprietary.
Augereau Jean-Charles
Blake Geoffrey
Brown Joanna
Dullemond Cornelis
Evans Neal II
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