A search for astrometric companions to very low-mass, Population II stars

Details A search for astrometric companions to very low-mass, Population II stars A search for astrometric companions to very low-mass, Population II stars

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008hst..prop11565l&link_type=abstract

HST Proposal ID #11565. Cycle 17

Astronomy and Astrophysics

Astronomy

Scientific paper

We propose to carry out a SNAPshot search for astrometric companions in a subsample of very low-mass, halo subdwarfs identified within 120 parsecs of the Sun. These ultra-cool M subdwarfs are local representatives of the lowest-mass H-burning objects from the Galactic Population II. The expected 3-4 astrometric doubles that will be discovered will be invaluable in that they will be the first systems from which gravitational masses of metal-poor stars at the bottom of the main sequence can be directly measured.;

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