New neighbours VI. Spectroscopy of DENIS nearby stars candidates. - INSU - Institut national des sciences de l'Univers
Article Dans Une Revue Astronomy & Astrophysics - A&A Année : 2005

New neighbours VI. Spectroscopy of DENIS nearby stars candidates.

Résumé

We present spectra of 36 nearby star candidates and 3 red giant candidates, identified in the DENIS database. 32 of the dwarf candidates are nearby red dwarfs, with spectral types from M 5.5 to M 8.5. Out of 11 targets with low proper motion ( arcsec yr) but a Reduced Proper Motion above an inclusive threshold, 9 are red dwarfs. The 4 contaminants are all reddened F–K main sequence stars, and could have been eliminated by checking for small well-known high latitude molecular clouds. These stars might be of interest as probes of interstellar absorption. For the red dwarfs we derive spectral types and spectroscopic distances, using a new calibration of the PC3 spectral index to absolute magnitudes in the and K photometric bands.
We confirm 2 new members of the 12 pc volume (2 new M 8.5), and one M 7.5 NLTT object closer than 10 pc; and show that one quarter of the stars with photometric distances under 30 pc have too small a proper motion for inclusion in the NLTT catalog.
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hal-00019637 , version 1 (05-01-2025)

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F. Crifo, N. Phan-Bao, X. Delfosse, T. Forveille, J. Guibert, et al.. New neighbours VI. Spectroscopy of DENIS nearby stars candidates.. Astronomy & Astrophysics - A&A, 2005, 441, pp.653-661. ⟨10.1051/0004-6361:20052998⟩. ⟨hal-00019637⟩
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