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Spectroscopy of Brown Dwarf Candidates in the NGC 1333 Molecular Cloud

Published online by Cambridge University Press:  26 May 2016

Bruce Wilking ,
Ayman Mikhail ,
Glenn Carlson ,
Michael R. Meyer  and
Thomas Greene
Bruce Wilking
Affiliation:
Department of Physics and Astronomy, University of Missouri-St. Louis, 8001 Natural Bridge Road, St. Louis, MO 63121
Ayman Mikhail
Affiliation:
Department of Physics and Astronomy, University of Missouri-St. Louis, 8001 Natural Bridge Road, St. Louis, MO 63121
Glenn Carlson
Affiliation:
Department of Physics and Astronomy, University of Missouri-St. Louis, 8001 Natural Bridge Road, St. Louis, MO 63121
Michael R. Meyer
Affiliation:
Steward Observatory, The University of Arizona, Tucson, AZ 85721
Thomas Greene
Affiliation:
NASA/Ames Research Center, M.S. 245–6, Moffett Field, CA 94035

Abstract

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We present an analysis of low-resolution infrared spectra for 25 brown dwarf candidates in the NGC 1333 molecular cloud. Candidates were chosen on the basis of their association with the high column density cloud core, and near-infrared fluxes and colors. We compare the depths of water vapor absorption bands in our candidate objects with a grid of dwarf, subgiant, and giant standards to determine spectral types which are independent of reddening. These data are used to derive effective temperatures and bolometric luminosities which, when combined with theoretical tracks and isochrones for pre-main sequence objects, enable us to estimate masses and ages. Depending on the models considered, a total of 9 to 20 brown dwarfs are identified with a median of age of <1 Myr.

Type
Part 2. Observations of Recently Born Substellar Objects
Information
Symposium - International Astronomical Union , Volume 211: Brown Dwarfs , 2003 , pp. 97 - 102
Copyright
Copyright © Astronomical Society of the Pacific 2001 

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