Hunting Coreshines with Spitzer

Details Hunting Coreshines with Spitzer Hunting Coreshines with Spitzer

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sptz.prop80053p&link_type=abstract

Spitzer Proposal ID #80053

Physics

Scientific paper

We propose deep Spitzer observations of a large sample of cold clumps selected from the newly released Planck Early Cold Cores Catalog. The proposed survey, characterized by uniform depth, will provide the first unbiased investigation of the coreshine effect in Galactic cold condensations.The coreshine effect, recently identified by Pagani et al. (2010) and Steinacker et al. (2010), is interpreted as direct evidence for dust growth in the dense, cold environments in the interior of molecular clouds. Understanding of the coagulation process is crucial for the investigation of further coagulation taking place in protostellar disks, and fundamental for improving our knowledge of the mechanisms regulating the formation of planets. In addition, grain coagulation in dense molecular environments could in principle change the global scenario of dust particles in the diffuse ISM, as a retransfer of grains from these cold condensations back into the diffuse medium is indeed likely (Ossenkopf 1993). Last but not least, the existence of a larger population of grains will have strong implications on our interpretation of both thermal continuum and emission line data, therefore impacting in a significant way our present view of how stars form. A by-product of the proposed observations will be an unbiased serendipitous survey of low-mass outflows, as well as candidate young stellar objects.

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