A BROWN DWARF CANDIDATE IN THE PRAESEPE OPEN CLUSTER

Authors
MAGAZZU A REBOLO R OSORIO MRZ MARTIN EL HODGKIN ST
Citation
A. Magazzu et al., A BROWN DWARF CANDIDATE IN THE PRAESEPE OPEN CLUSTER, The Astrophysical journal, 497(1), 1998, pp. 47-50
Citations number
37
Categorie Soggetti
Astronomy & Astrophysics
Journal title
The Astrophysical journal → ACNP
ISSN journal
0004637X
Volume
497
Issue
1
Year of publication
1998
Part
2
Pages
47 - 50
Database
ISI
SICI code
0004-637X(1998)497:1<47:ABDCIT>2.0.ZU;2-M
Abstract
We present optical and infrared observations of Rogue 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 arcmin(2) of the Praesep e open cluster. A low-resolution spectrum shows that RPr 1 is a very l ate object, the latest object in Praesepe for which a spectrum has bee n taken to date. Our estimates give a mass between 0.063 and 0.084 M. and indicate that RPr 1 may turn out to be the first brown dwarf in th is cluster.