Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-09-15
Mon.Not.Roy.Astron.Soc.373:705-714,2006
Astronomy and Astrophysics
Astrophysics
10 pages, 7 figures, accepted for publication in MNRAS
Scientific paper
10.1111/j.1365-2966.2006.11051.x
We present spectra of 59 nearby stars candidates, M dwarfs and white dwarfs, previously identified using high proper motion catalogues and the DENIS database. We review the existing spectral classification schemes and spectroscopic parallax calibrations in the near-infrared $J$-band and derive spectral types and distances of the nearby candidates. 42 stars have spectroscopic distances smaller than 25 pc, three of them being white dwarfs. Two targets lie within 10 pc, one M8 star at 10.0 pc (APMPM J0103-3738), and one M4 star at 8.3 pc (LP 225-57). One star, LHS 73, is found to be among the few subdwarfs lying within 20 pc. Furthermore, together with LHS 72, it probably belongs to the closest pair of subdwarfs we know.
Irwin Mike
Reyle Céline
Robin Annie C.
Scholz Ralf-Dieter
Schultheis Mathias
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