Finding Cool Subdwarfs Using a V−J Reduced Proper‐Motion Diagram: Stellar Parameters for 91 Candidates

Abstract

ABSTRACTWe 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. Kinematic (U, V, and W) and self‐consistent stellar parameters (Teff, log g, [Fe/H], and ξt) are derived for 91 candidate subdwarfs based on high‐resolution spectra. The observed stars span 3900 K < Teff < 6200 K and −2.63 < [Fe/H] < 0.25 including only three 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.