Time Series Photometry of the Youngest Stars - MIPS24 Photometry for IC1396A

Details Time Series Photometry of the Youngest Stars - MIPS24 Photometry for IC1396A Time Series Photometry of the Youngest Stars - MIPS24 Photometry for IC1396A

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop..497s&link_type=abstract

Spitzer Proposal ID #497

Physics

Scientific paper

We have recently obtained IRAC time-series photometry of the embedded, very young cluster of young stellar objects (YSOs) in the Elephant's Trunk Nebula (a.k.a. IC1396A). About 20% of the YSOs, including about half of the Class I stars, showed relatively large amplitude (> 0.1 mag) variability with characteristic timescales of 4 to 15 days, and with very little difference in light curve shape and amplitude between 3.6 and 8 microns. The most plausible physical model for these variations is that we are seeing these stars primarilyin scattered light all the way out to 8 microns, and that the sources of the variability are hot spots (from accretion flows) on the surfaces of these stars. In order to place further constraints on models for these stars, we propose to obtain MIPS24 photometric observations of the 5'x5' "head" of the IC1396A star-forming globule at sixteen epochs, about twice per day, during a single MIPS campaign. We will also obtain a small amount of new IRAC time-series photometry in an adjacent campaign in order to place the MIPS photometry in better context with the existing IRAC light curves obtained in February 2008. The entire set of observations requires 3.6 hours of observing time.

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