A Snapshot Search for Halo Very-Low-Mass Binaries

Details A Snapshot Search for Halo Very-Low-Mass Binaries A Snapshot Search for Halo Very-Low-Mass Binaries

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop.9842g&link_type=abstract

HST Proposal ID #9842

Computer Science

Hst Proposal Id #9842 Cool Stars

Scientific paper

We propose a snapshot search for binary M subdwarf stars. These nearby stars have high velocities and low metallicies that identify them as members of the old Galactic halo {Population II}. ACS imaging is requested to search for secondary companions. This supplements a previous snapshot program that only obtained 10 observations. The observed binary fraction will be compared to the disk M dwarf fraction to look for differences in star formation. It is likely that a system suitable for orbital mass determinations will be found. In this case, future HST observations could determine the first masses for very-low-mass, low-metallicity stars.

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