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

  • Anandmayee Tej (a1), Kailash C. Sahu (a2), T. Chandrasekhar (a3) and N. M. Ashok (a3)

Abstract

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%.

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References

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Tej, A., Sahu, K.C., Chandrasekhar, T. and Ashok, N.M. 2002 ApJ (in press) (astro-ph/0206325)

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

  • Anandmayee Tej (a1), Kailash C. Sahu (a2), T. Chandrasekhar (a3) and N. M. Ashok (a3)

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