| Issue |
EAS Publications Series
Volume 10, 2003
JENAM 2002, Galactic & Stellar Dynamics
|
|
|---|---|---|
| Page(s) | 163 - 163 | |
| DOI | https://doi.org/10.1051/eas:2003142 | |
| Published online | 22 December 2003 | |
C. Boily, P. Patsis, S. Portegies Zwart, R. Spurzem and C. Theis (eds)
EAS Publications Series, 10 (2003) 163
Mass Segregation in the Open Cluster NGC 2422
1
Dipartimento di Scienze Fisiche ed Astronomiche,
Università di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy
2
INAF - Osservatorio Astronomico di Palermo,
Piazza del Parlamento 1, 90134 Palermo, Italy
3
Astrophysics Division - Space Science Department
of ESA, ESTEC, Postbus 299, 2200 AG Noordwijk, The Netherlands
UBVRI photometry of the open cluster NGC2422 (age ~108 yr) down to a limiting magnitude V ≃ 19 is used to study the cluster spatial distribution and the luminosity and mass functions. From the Color-Magnitude Diagram (CMD), we obtained a list of candidate cluster members based on a photometric criterion. Using a comparison field region and an iterative procedure, a correction for contaminating field stars has been inferred in order to obtain the luminosity and the mass functions in the M=0.4-3.5 M⊙ range. By analyzing the spatial distribution, we infer that a non-negligible number of cluster stars lie outside our investigated region. We estimate a correction to the mass function of the cluster in order to take into account the complete stellar population. The Present Day Mass Function of NGC2422 can be represented by a power-law of index α = 3.07 ± 0.08 (rms) in the mass range 0.9 ≤ M/M⊙ ≤ 2.5. The index α and the total mass of the cluster are very similar to those of the Pleiades.
© EAS, EDP Sciences, 2003