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New neighbours. I. 13 new companions to nearby M dwarfs
X. Delfosse, T. Forveille, J. -L. Beuzit +3
We present preliminary results of a radial-velocity search for companions to a volume limited sample of M dwarfs. Typical accuracy range between 10m/s for the brighter stars and 70…
The closest extrasolar planet: A giant planet around the M4 dwarf Gl 876
Xavier Delfosse, Thierry Forveille, Michel Mayor +3
High precision radial velocity observations of the nearby M4 dwarf Gl 876 with the Observatoire de Haute Provence 1.93 m telescope and the new 1.20 m swiss telescope at la Silla in…
Optical Spectroscopy of DENIS Mini-survey Brown Dwarf Candidates
C. G. Tinney, X. Delfosse, T. Forveille +1
We present optical (6500-9200A) spectroscopy of eight cool dwarfs detected in a 231 square degree ``Mini-survey'' of the Deep NEar Infrared Survey (DENIS) data. We are able to conf…