Resolving a Binary System that Straddles the L/T Transition

Details Resolving a Binary System that Straddles the L/T Transition Resolving a Binary System that Straddles the L/T Transition

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004hst..prop10247c&link_type=abstract

HST Proposal ID #10247

Physics

Hst Proposal Id #10247 Cool Stars

Scientific paper

We propose to make the first unequivocal resolved observation of a brown dwarf binary system comprised of an L dwarf and a T dwarf. The proposed observations will confirm the binarity of the system, measure the physical separation of the two components, provide a robust spectral type estimate for the T dwarf secondary, and enable the mass ratio of the system to be determined. As a late-L/mid-T binary, the components straddle the poorly understood "L/T transition" where a brightening of T dwarfs at J-band is observed compared to the comparatively warmer L dwarfs. In addition to testing theories for this brightening, these data will put strong constraints on substellar evolution and formation models.

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