Searching for very low mass companions around young brown dwarfs with IRAC

Details Searching for very low mass companions around young brown dwarfs with IRAC Searching for very low mass companions around young brown dwarfs with IRAC

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30717m&link_type=abstract

Spitzer Proposal ID #30717

Computer Science

Scientific paper

We propose to observe very low mass stars and brown dwarfs (M1 < 90Mjup) in young open clusters (Alpha Per and Blanco1; both with ~100 Myr) with IRAC to detect binary companions at any separation and with a mass ratio down to q~0.2. We will observe our targets in the 4 IRAC bands in order to determine their SED from NIR to MIR wavelengths and thus derive precise temperature and mass. Companions will then be identified by their excess in the IRAC 3.6 and 4.5 um bands, where our photometric accuracy is highest. Our approach is particularly well suited to detect 15-20 Mjup companions to 30-90 Mjup primaries.

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