A NICMOS Survey for Protostellar Binaries in the Orion Molecular Clouds

Details A NICMOS Survey for Protostellar Binaries in the Orion Molecular Clouds A NICMOS Survey for Protostellar Binaries in the Orion Molecular Clouds

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21542913k&link_type=abstract

American Astronomical Society, AAS Meeting #215, #429.13; Bulletin of the American Astronomical Society, Vol. 42, p.352

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Scientific paper

The Orion molecular clouds contain the largest sample of protostars within 500 pc of the Sun. As part of a coordinated, multi-observatory program to study protostars in Orion, we observed 72 protostars with the NICMOS camera in the F160W and F205W filters. In addition to mapping the scattered light from the individual protostars (the primary goal of the program), these data allow us to detect companions at separations as small as 100 AU at the distance of Orion. We present a search for close companions to the protostars using the NICMOS data. By combining the NICMOS imaging with a Spitzer space telescope survey of the Orion clouds, we determine the density of candidate YSOs as a function of distance from each of the targeted protostars. With this analysis, we find a clear enhancement in the density of sources near the protostars, indicating that the apparent nearby companions are not due to chance alignments. We compare the incidence of multiplicity with that found in other star forming regions and in the field. This project was supported through the NSF's Research Experience for Undergraduates program and the First Year Summer Research Experience program, both at the University of Toledo.

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