The Weight-Watcher Program for Subdwarfs

Details The Weight-Watcher Program for Subdwarfs The Weight-Watcher Program for Subdwarfs

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006hst..prop10927j&link_type=abstract

HST Proposal ID #10927. Cycle 15

Computer Science

Scientific paper

We propose to use HST/FGS1r to measure five subdwarf spectroscopic binaries to determine masses for the components. Their metallicities, [Fe/H], range from -0.5 to -2.5, and their projected minimum separations range from 9 to 24 mas. These binaries are resolvable with HST/FGS1r but not any ground-based technique. Currently, there are only two subdwarf systems having any mass measurements. The proposed work will boost the total number of subdwarf systems with masses from two to seven, and allow us to construct the first mass-luminosity relation for low-metallicity stars.

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