An IRS Survey of Spitzer Identified Protostars in the Orion Molecular Clouds

Details An IRS Survey of Spitzer Identified Protostars in the Orion Molecular Clouds An IRS Survey of Spitzer Identified Protostars in the Orion Molecular Clouds

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50374m&link_type=abstract

Spitzer Proposal ID #50374

Computer Science

Scientific paper

Understanding protostellar evolution is a necessary step toward characterizing the factors which ultimately determine the properties of emerging stars and their planetary systems. We propose the completion of a Spitzer IRS survey of 362 protostars in Orion; thus providing a unique sample selected in an unbiased manner from their 24~mum fluxes and spectral energy distribution slopes. This is the richest known sample of protostars at a common distance within 450 pc of the Sun. The low resolution IRS 5-36~mum spectra, in concert with existing Spitzer imaging, existing ground-based near-IR data, and future Herschel GTO and proposed Open Time observations will be used to determine the fundamental properties of the protostellar envelopes and disks (properties such as envelope structure, density and angular momentum, disk luminosity). The Orion molecular cloud complex contains an exceptionally wide range of parental gas conditions (i.e. initial conditions) and environments (from dense clusters to relatively isolated protostars). By comparing the properties of protostars in different regions of Orion clouds; we will assess the roles of initial conditions, environment and feedback from outflows in guiding protostellar evolution. These observations will produce a unique legacy dataset for guiding and testing a theory of protostellar evolution.

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