TY - JOUR
T1 - Spectroscopic distances of nearby ultracool dwarfs
AU - Phan-Bao, N.
AU - Bessell, M. S.
PY - 2006/2
Y1 - 2006/2
N2 - We present updated results of spectroscopic follow-up observations of a sample of 45 M dwarf candidates identified by Phan-Bao et al. (2003, A&A, 401, 959) based on the DENIS photometry and proper motion measurements. Forty one of these are nearby late-M dwarfs (d < 30 pc) with spectral types ranging from M5.0 to M8.5 computed from the spectral indices. One contaminant is probably an F-G main sequence star reddened by intervening dust and three stars that were not observed have previous classifications as M dwarfs in the literature. In this paper, we identify three M7.5, five M8.0, one M8.5 dwarf and confirm two new M8.0 dwarf members of the 25 pc volume.
AB - We present updated results of spectroscopic follow-up observations of a sample of 45 M dwarf candidates identified by Phan-Bao et al. (2003, A&A, 401, 959) based on the DENIS photometry and proper motion measurements. Forty one of these are nearby late-M dwarfs (d < 30 pc) with spectral types ranging from M5.0 to M8.5 computed from the spectral indices. One contaminant is probably an F-G main sequence star reddened by intervening dust and three stars that were not observed have previous classifications as M dwarfs in the literature. In this paper, we identify three M7.5, five M8.0, one M8.5 dwarf and confirm two new M8.0 dwarf members of the 25 pc volume.
KW - Stars: low-mass, brown dwarfs
UR - https://www.scopus.com/pages/publications/31544475414
U2 - 10.1051/0004-6361:20054064
DO - 10.1051/0004-6361:20054064
M3 - Article
SN - 0004-6361
VL - 446
SP - 515
EP - 523
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
IS - 2
ER -