Brown dwarf candidates from the PennState-Toruń Planet Search with the Hobby-Eberly Telescope .

Niedzielski, A.; Wolszczan, A.; Adamów, M.; Nowak, G.; Deka, B.; Górecka, M.; Kowalik, K.
Referencia bibliográfica

Memorie della Societa Astronomica Italiana, v.84, No. 4, p.1035 (2013)

Fecha de publicación:
2013
Número de autores
7
Número de autores del IAC
0
Número de citas
2
Número de citas referidas
2
Descripción
We present preliminary results of a brown dwarf (BD) detection in a ˜1000 star sample monitored with the ongoing PennState-Toruń Centre for Astronomy Planet Search. Contrary to most other projects, our sample contains a substantial fraction of evolved stars ranging from sub-giants up to bright giants, allowing us to study companions to stars more massive than ˜1.5 M⊙. For Main Sequence stars, this limit is set by effective temperature and rotation velocity. Our relatively long list of about a dozen candidates suggests that the BD frequency may rise with stellar mass as it does in the case of planets \citep{lm2007}.