Archival Survey of Orion A with Spitzer, XMM-Newton and Chandra

Details Archival Survey of Orion A with Spitzer, XMM-Newton and Chandra Archival Survey of Orion A with Spitzer, XMM-Newton and Chandra

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50145w&link_type=abstract

Spitzer Proposal ID #50145

Computer Science

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Scientific paper

We propose an archival project to combine data from the Spitzer GTO surveys of the Orion A cloud with archival XMM-Newton and Chandra observations of the same region and our own ground based spectra to better understand star formation in the nearest giant molecular cloud. To understand the evolution of stars and disks in the first million years requires a large sample. The Spitzer Orion GTO surveys contain 1800+ Class 0, I, and II stars and an unknown number of Class III sources. The X-ray observations, which include over 2000 sources, are the premier method of identifying the remaining young stars WITHOUT disks. Combining these data with ground based optical spectra and sub-mm observations we will: - Identify the PMS stars without disks. - Determine the demographics of stars (clusters, groups, isolation) as a function of evolutionary class. - Study the relative importance of clustered versus isolated star formation. - Examine the effect of environment on star formation and disk evolution. - Examine the relative duration of the Class II and transition disk phases and the commonality of inner disk holes. - Study the evolution of the X-ray emitting plasma from the protostellar to the pre-main sequence phases. - Study the possible effect of X-rays on evolving disk systems. GMCs are the dominant sites of star formation in our Galaxy. The combination of data from optical, infrared and sub-mm surveys will provide the most complete survey of star formation in a GMC to date. With these data, we hope to better understand the star forming process in GMCs, and what distinguishes these massive clouds from nearby dark cloud complexes such as Taurus and Ophiuchus.

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