Hostname: page-component-745bb68f8f-b95js Total loading time: 0 Render date: 2025-02-03T09:23:10.159Z Has data issue: false hasContentIssue false
  • English
  • Français

Determination of Substellar Mass Function of Young Open Clusters Using 2MASS and GSC Data

Published online by Cambridge University Press:  26 May 2016

Anandmayee Tej ,
Kailash C. Sahu ,
T. Chandrasekhar  and
N. M. Ashok
Anandmayee Tej
Affiliation:
Observatoire Astronomique de Strasbourg, 67000 Strasbourg, France
Kailash C. Sahu
Affiliation:
Space Telescope Science Institute, Baltimore, MD 21218, USA
T. Chandrasekhar
Affiliation:
Physical Research Laboratory, Navrangpura, Ahmedabad – 380009, India
N. M. Ashok
Affiliation:
Physical Research Laboratory, Navrangpura, Ahmedabad – 380009, India

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We present a statistical method to derive the mass functions of open clusters using sky survey data such as the 2 Micron All Sky Survey (2MASS) and the Guide Star Catalogue (GSC). We have used this method to derive the mass functions in the stellar/substellar regime of three young, nearby open clusters, namely IC 348, σ Orionis and Pleiades. The mass function in the low mass range (M< 0.50M⊙) is appreciably flatter than the stellar Salpeter function for all three open clusters. The contribution of objects below 0.5 M⊙ to the total mass of the cluster is ~40% and the contribution of objects below 0.08 M⊙ to the total is ~4%.

Type
Part 4. Observations of Young Brown Dwarfs (age ≃ 50–200 Myr)
Information
Symposium - International Astronomical Union , Volume 211: Brown Dwarfs , 2003 , pp. 175 - 178
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

Baraffe, I., Chabrier, G., Allard, F., & Hauschildt, P.H. 1998, A&A, 337, 403 Google Scholar
Béjar, V.J.S., Martín, E.L., Zapatero Osorio, M.R., et al. 2001, ApJ, 556, 830 CrossRefGoogle Scholar
Chabrier, G., Baraffe, I., Allard, F., & Hauschildt, P.H. 2000, ApJ, 542, 464 CrossRefGoogle Scholar
Leggett, S.K. 1992, ApJS, 82, 351 Google Scholar
Luhman, K. L. 1999, ApJ, 525, 466 Google Scholar
Tej, A., Sahu, K.C., Chandrasekhar, T. and Ashok, N.M. 2002 ApJ (in press) (astro-ph/0206325) Google Scholar