Other
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3557l&link_type=abstract
Spitzer Proposal ID #3557
Other
Scientific paper
The structure of the circumstellar envelope of young stellar objects has important ramifications on protostellar evolution,multiplicity, and the formation of the circumstellar disk and eventually planets. Even though these regions are very highly extincted, the Spitzer Space Telescope can peer into these protostellar envelopes and unlock their secrets. We are proposing very deep, single pointing observations of 5 Class 0 sources (4 pointings) in the 4 bands of IRAC (900 seconds) and the 24 micron band of MIPS (600 seconds maps). The sources were selected from our BIMA millimeter array interferometric survey of deeply embedded Class 0 sources. Our current models of the circumstellar envelope density profile have produced surprising results: the density is steeper than theoretically predicted. However it can be argued that the model is oversimplified due to a lack of an outflow cavity constraint. This proposal has two main goals: (1) to look for the holes of star formation toward these embedded systems where the scattered light from the star peeks through the highly extincted cloud region, and (2) to examine the multiplicity of the region by searching for heretofore undiscovered brown dwarves or other low mass companions.
Hamidouche Murad
Kwon Woojin
Looney Leslie
Mundy Lee
Volgenau Nikolaus
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