Luminosity and mass function of the galactic open cluster ngc 2422
Apr, 200312 pages
Published in:
- Astron.Astrophys. 404 (2003) 927-938
e-Print:
- astro-ph/0304321 [astro-ph]
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Abstract: (arXiv)
We present UBVRI photometry of the open cluster NGC 2422 (age yr) down to a limiting magnitude . These data are used to derive the Luminosity and Mass Functions and to study the cluster spatial distribution. By considering the color-magnitude diagram data and adopting a representative cluster main sequence, we obtained a list of candidate cluster members based on a photometric criterion. Using a reference field region and an iterative procedure, a correction for contaminating field stars has been derived in order to obtain the Luminosity and the Mass Functions in the range. By fitting the spatial distribution, we infer that a non-negligible number of cluster stars lies outside our investigated region. We have estimated a correction to the Mass Function of the cluster in order to take into account the missing cluster stars. The Present Day Mass Function of \ngc2422 can be represented by a power-law of index (rms) -- the Salpeter Mass Function in this notation has index -- in the mass range . The index and the total mass of the cluster are very similar to those of the Pleiades.References(28)
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