|Authors||L. Prisinzano (1), G. Micela (2), S. Sciortino (2), F. Favata (3)|
|Affiliation||1 Dipartimento di Scienze Fisiche ed Astronomiche, UniversitÓ di Palermo, Piazza del Parlamento 1, I-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
|Accepted by||Astronomy & Astrophysics|
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 M=0.4-3.5 Mo 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 NGC 2422 can be represented by a power-law of index alpha = 3.07 ± 0.08 (rms) - the Salpeter Mass Function in this notation has index alpha = 2.35 - in the mass range 0.9 < M/Mo < 2.5. The index alpha and the total mass of the cluster are very similar to those of the Pleiades.