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We characterize the stellar population of the poorly explored young stellarcluster NGC 3293 at the northwestern periphery of the Carina Nebula Complex, inorder to evaluate the cluster age and the mass function, and to test claims ofan abnormal IMF and a deficit of M <= 2.5 M_sun stars. We performed a deep (70ksec) X-ray observation of NGC 3293 with Chandra and detected 1026 individualX-ray point sources. We identify counterparts for 74% of the X-ray sources indeep near-infrared images. Our data clearly show that NGC 3293 hosts a largepopulation of solar-mass stars, refuting claims of a lack of M <= 2.5 M_sunstars. The analysis of the color magnitude diagram suggests an age of ~8-10 Myrfor the low-mass population of the cluster. There are at least 511 X-raydetected stars with color magnitude positions that are consistent with youngstellar members within 7 arcmin of the cluster center. The number ratio ofX-ray detected stars in the 1-2 M_sun range versus the M >= 5 M_sun stars(known from optical spectroscopy) is consistent with the expectation from anormal field initial mass function. Most of the early B-type stars and 20% ofthe later B-type stars are detected as X-ray sources. Our data shows that NGC3293 is one of the most populous stellar clusters in the entire Carina NebulaComplex. The cluster probably harbored several O-type stars, whose supernovaexplosions may have had an important impact on the early evolution of theCarina Nebula Complex.

Chandra X-ray observation of the young stellar cluster NGC 3293 in the Carina Nebula Complex