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Brown Dwarfs in the Alpha Persei Cluster

Published online by Cambridge University Press:  26 May 2016

John R. Stauffer ,
David Barrado y Navascués ,
Jerome Bouvier ,
Nicholas Lodieu  and
Mark McCaughrean
John R. Stauffer
Affiliation:
SIRTF Science Center, California Institute of Technology, Pasadena, CA 91125
David Barrado y Navascués
Affiliation:
LAEFF-INTA, Apdo. 50727, Madrid 28080 SPAIN
Jerome Bouvier
Affiliation:
Observatoire de Grenoble, Université J. Fourier, Grenoble Cedex 9, 38041 France
Nicholas Lodieu
Affiliation:
Astrophysikalisches Institut Potsdam, Potsdam, 14482 Germany
Mark McCaughrean
Affiliation:
Astrophysikalisches Institut Potsdam, Potsdam, 14482 Germany

Abstract

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We have obtained a new, deep, wide-field optical imaging survey of the young Alpha Persei cluster which reveals a well-populated lower main sequence extending into the substellar mass regime. Subsequent infrared photometry confirms that most of the candidate brown dwarfs are indeed likely to be cluster members, with a predicted minimum mass of order 0.035 solar masses. We have combined the new candidate list with previous member catalogs to derive an IMF for Alpha Per; the slope of the IMF at the low mass end is α ~ 0.66. The Alpha Per IMF slope is thus very similar to that found in the Pleiades.

Type
Part 4. Observations of Young Brown Dwarfs (age ≃ 50–200 Myr)
Information
Symposium - International Astronomical Union , Volume 211: Brown Dwarfs , 2003 , pp. 163 - 170
Copyright
Copyright © Astronomical Society of the Pacific 2001 

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