Other
Scientific paper
Jun 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20339s&link_type=abstract
Spitzer Proposal ID #20339
Other
Scientific paper
We propose to examine in detail a single, particularly diverse star-forming region, the Lambda Ori star-forming region (LOSFR), with the goal of attempting to understand how the local environment may affect disk formation and evolution even within a single star-forming region. At the center of the LOSFR is a compact, rich cluster containing many high mass stars and thought to have been the site of a supernova within the past approximately two million years. Winds from the supernova and the remaining high mass stars have clearly sculpted the ISM over the 15 x 15 pc region of the LOSFR, sweeping up most of the gas and dust into a shell seen prominently with IRAS. A number of additional clusters exist in the LOSFR, many of them near the ``leading edge" of the molecular gas in the ring, possibly indicating that star formation at those sites was triggered by the shock wave associated with the events occurring in the central star cluster. We have previously obtained Spitzer IRAC and MIPS imaging of the central star cluster with the aim of determining the frequency of circumstellar disks there. With this proposal, we ask for additional time to obtain maps of several other sites of recent star-formation in the LOSFR in order to determine the IMF of these clusters and their disk frequency and radial structure as a function of cluster age and cluster location within the LOSFR. We will use these data, along with ground-based photometry and spectroscopy which we are gathering, in order to form a more detailed model of the star-forming history of the LOSFR.
Allen Lori
Barrado Navascués David Y.
Hartmann Lee
Megeath Tom
Ramirez Solange S.
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