An Unbiased Survey of the Gem OB1 Molecular Cloud Complex

Details An Unbiased Survey of the Gem OB1 Molecular Cloud Complex An Unbiased Survey of the Gem OB1 Molecular Cloud Complex

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50519f&link_type=abstract

Spitzer Proposal ID #50519

Computer Science

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Scientific paper

We propose an unbiased 24 micron survey of the Giant Molecular Cloud complex known as Gem~OB1. Unlike the nearby dark clouds surveyed by Spitzer Legacy teams, GMCs are responsible for most of the star formation in the Galaxy and therefore are more representative of the typical birthplace of stars. The Gem~OB1 cloud lies toward the outer Galaxy where the Galactic background and line-of sight extinction are both low, and near enough that its solar-mass protostars are easily detectable by Spitzer. Gem~OB1 is notable for its multiple bubble like structures and other complex morphologies seen in molecular gas. The proposed 24 micron data will be used to identify protostars throughout the cloud, and will be combined with data from subsequent surveys to study the distribution of T-Tauri stars, the evolution of protostellar envelopes and disks, and the demographics of stellar masses and ages in the Gem~OB1 GMC. The proposed 24 micron measurements are essential for identifying embedded protostars, and for characterizing disk evolution, especially in older systems that are evolving from protoplanetary to debris disks. This survey will 'set the stage' for a Spitzer warm mission follow-up project, aimed at further characterizing the young stars in Gem~OB1.

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