A Brown Dwarf Candidate in the Praesepe Open Cluster

Bibcode
1998ApJ...497L..47M
DOI
10.1086/311273
Magazzu, A.; Rebolo, R.; Zapatero Osorio, M. R.; Martin, E. L.; Hodgkin, S. T.
Bibliographical reference

Astrophysical Journal Letters v.497, p.L47

Advertised on:
4
1998
Number of authors
5
IAC number of authors
1
Citations
21
Refereed citations
17
Description
We present optical and infrared observations of Roque Praesepe 1 (RPr 1), a faint ( I=21.01 ) and very red object ( I-K=4.57 ) discovered in a deep CCD survey, covering an area of 800 arcmin2 of the Praesepe open cluster. A low-resolution spectrum shows that RPr 1 is a very late object, the latest object in Praesepe for which a spectrum has been taken to date. Our estimates give a mass between 0.063 and 0.084 Msolar and indicate that RPr 1 may turn out to be the first brown dwarf in this cluster.
Type
Refereed

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