Young Stellar Object Variability at IRAC Wavelengths: Clues to Star and Planet Formation

Details Young Stellar Object Variability at IRAC Wavelengths: Clues to Star and Planet Formation Young Stellar Object Variability at IRAC Wavelengths: Clues to Star and Planet Formation

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21421002s&link_type=abstract

American Astronomical Society, AAS Meeting #214, #210.02; Bulletin of the American Astronomical Society, Vol. 41, p.715

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Scientific paper

Spitzer/IRAC in the warm mission is the only facility, now existing or planned, capable of carrying out an extensive, accurate time series photometric monitoring survey of star-forming regions in the thermal infrared The demonstrated sensitivity and stability of IRAC allows measurement of the relative fluxes of YSO's down to the substellar mass limit to 1-2% accuracy in star-forming regions out to >500 pc. Our exploration science project - YSOVAR - will obtain synoptic data for the Orion Nebula Cluster and 11 very young, populous embedded star-forming cores. Each cluster will be observed at 80 or more epochs spread over 40+ days, with generally two observations per day. These data will allow us to: (a) provide otherwise unobtainable constraints on the structure of the inner disks in Class I and II YSOs - and hence, perhaps, provide clues to the formation and migration of planets at young ages; (b) measure the short and long-term stability of hot spots on the surfaces of YSO's of all evolutionary stages; and (c) determine rotational periods for the largest sample to date of Class I YSO's and hence obtain the best measure of the initial angular momentum distribution of young stars.

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