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A Deep Large Scale Survey for Intermediate Age Brown Dwarfs in the Praesepe Cluster

Published online by Cambridge University Press:  26 May 2016

R. J. Chappelle ,
D. J. Pinfield  and
I. A. Steele
R. J. Chappelle
Affiliation:
Astrophysics Research Institute, Liverpool John Moores University, Egerton Wharf, Birkenhead CH41 1LD, UK
D. J. Pinfield
Affiliation:
Astrophysics Research Institute, Liverpool John Moores University, Egerton Wharf, Birkenhead CH41 1LD, UK
I. A. Steele
Affiliation:
Astrophysics Research Institute, Liverpool John Moores University, Egerton Wharf, Birkenhead CH41 1LD, UK

Abstract

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We present a 1.4 square degree survey of the Praesepe open cluster complete to I = 21.3 and Z = 20.2. This corresponds to masses down to 0.06M⊙ and 0.075M⊙ for an assumed cluster age of 1.0 or 0.5 Gyrs respectively. Over fifty new Praesepe candidate members have been discovered with masses less than 0.25M⊙. We discuss plans to establish proper motions of identified Praesepe candidates, and to measure NIR photometry of our candidates.

Type
Part 5. Imaging Searches for Mature Ultracool Dwarfs
Information
Symposium - International Astronomical Union , Volume 211: Brown Dwarfs , 2003 , pp. 211 - 212
Copyright
Copyright © Astronomical Society of the Pacific 2001 

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