A brown dwarf candidate in the Praesepe Open Cluster

Details A brown dwarf candidate in the Praesepe Open Cluster A brown dwarf candidate in the Praesepe Open Cluster

1998-02-13

arxiv.org/abs/astro-ph/9802178v1

Astrophys.J. 497 (1998) L47

Astronomy and Astrophysics

Astrophysics

7 pages, 3 Postscript figures, to be published in The Astrophysical Journal Letters

Scientific paper

10.1086/311273

We present optical and infrared observations of RPr1, a faint (I = 21.01) and very red object (I - K = 4.57) discovered in a deep CCD survey, covering an area of 800 square arcmin of the Praesepe open cluster. A low resolution spectrum shows that RPr1 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 solar masses, and indicate that RPr1 may turn out to be the first brown dwarf in this cluster.

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