Searching for Proto-clusters in a Quiescent GIant Molecular Cloud: A Survey for Low Mass Stars and Protostars in Maddalena's Cloud

Details Searching for Proto-clusters in a Quiescent GIant Molecular Cloud: A Survey for Low Mass Stars and Protostars in Maddalena's Cloud Searching for Proto-clusters in a Quiescent GIant Molecular Cloud: A Survey for Low Mass Stars and Protostars in Maddalena's Cloud

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3178m&link_type=abstract

Spitzer Proposal ID #3178

Computer Science

Scientific paper

We propose an IRAC and MIPS survey toward recently identified dense cores in Maddalena's cloud, a unique, quiescent giant molecular cloud. To date, no sites of star formation have been identified in this 100,000 solar mass cloud; however, our detection of massive (~ 500 solar mass) dense cores suggests that the formation of entire clusters of stars is imminent. At a distance of 2 kpc, it is possible that isolated, low mass pre-main sequence stars and protostars remain undetected this cloud. IRAC and MIPS will be able to detect any T-Tauri star down to the hydrogen burning limit, as well as one solar luminosity protostars too faint to have been detected with MSX and IRAS. We will also observe the cool dust in the dense cores using the MIPS 70 and 160 micron bands. With these data, we can map the dust temperature and column density in the dense cores with twice the angular resolution of our millimeter-wave maps. We will use the dust map to study the density structure of the dense cores and compare the density structure to active cluster forming cores. With this data, we will determine whether low mass star formation has started toward the dense cores, giving us a rare glimpse at what appears to be the first stages of cluster formation.

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