Searching for Disks in TW Hya Association Brown Dwarfs

Details Searching for Disks in TW Hya Association Brown Dwarfs Searching for Disks in TW Hya Association Brown Dwarfs

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3626g&link_type=abstract

Spitzer Proposal ID #3626

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Scientific paper

We propose to obtain IRAC and MIPS (24 micron) imaging of two 2MASS-discovered brown dwarfs in the TW Hya Assocation. These substellar objects are about 25 times the mass of jupiter, 11 million years old, and 50 parsecs away. They thus offer the opportunity to search for IR excesses due to a disk in a closer, less confused region than Orion or other star forming regions. Substantial evidence already exists that one of our targets is currently accreting from a disk. The IRAC data will complement our X-Ray, UV, and optical observations aleady obtained or scheduled. As a side benefit, our observations are also sensitive to planetary companions, if any exist at extreme (1000+ AU) separation, and will test model atmospheres of young brown dwarfs.

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