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Finding cool subdwarfs using a V-J reduced proper-motion diagram: Stellar parameters for 91 candidates | David Yong
; David L. Lambert
; | Date: |
3 Jun 2003 | Subject: | astro-ph | Affiliation: | University of Texas at Austin | Abstract: | We present the results of a search for cool subdwarfs for which our candidates were drawn from a V-J reduced proper-motion diagram constructed by Salim & Gould (2002). Kinematic (U, V, and W) and self-consistent stellar parameters (Teff, log g, [Fe/H], and V_t) are derived for 91 candidate subdwarfs based on high resolution spectra. The observed stars span 3900K < Teff < 6200K and -2.63 < [Fe/H] < 0.25 including only 3 giants (log g < 4.0). Of the sample, 77 stars have MgH lines present in their spectra. With more than 56% of our candidate subdwarfs having [Fe/H] < -1.5, we show that the V-J reduced proper-motion diagram readily identifies metal-poor stars. | Source: | arXiv, astro-ph/0306076 | Services: | Forum | Review | PDF | Favorites |
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