The Initial Mass Functions of Four Embedded Stellar Clusters

Details The Initial Mass Functions of Four Embedded Stellar Clusters The Initial Mass Functions of Four Embedded Stellar Clusters

2006-01-04

arxiv.org/abs/astro-ph/0601083v1

Astron.J.131:2571-2589,2006

Astronomy and Astrophysics

Astrophysics

21 pages, 16 figures, accepted to AJ

Scientific paper

10.1086/500641

We present near-infrared $J$, $H$, and $K$ images of four embedded stellar clusters in the Galaxy. We find a significant fraction of pre-main-sequence stars present in at least one of the clusters. For the clusters dominated by main-sequence stars, we determine the initial mass function (IMF) both by using the $K$ luminosity function and a global extinction correction and by deriving individual extinction corrections for each star based on their placement in the $K$ vs. $H-K$ color-magnitude diagram. Based on our IMFs we find a significant discrepancy between the mean IMF derived via the different methods, suggesting that taking individual extinctions into account is necessary to correctly derive the IMF for an embedded cluster.

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