Mapping the Local Galactic Halo. I. Optical Photometry of Cool Subdwarf Candidates

Astronomy and Astrophysics – Astronomy

Scientific paper

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Galaxy: Halo, Solar Neighborhood, Stars: Late-Type, Subdwarfs

Scientific paper

Optical (BVRI) photometric measurements of a sample of 564 candidate cool subdwarfs in the nearby halo are presented. The stars generally span the color range 0.4<(B-V)<1.8 hence, the sample is composed of early F- through early M-type stars on the subdwarf sequence. The sample is selected from the revised NLTT catalog of Gould and Salim and Salim and Gould via a reduced proper motion diagram. The photometry is precise and accurate; in particular, for stars with 9

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