SCYON Abstract

Received on March 12 2004

XMM-Newton observation of the young open cluster Blanco 1.
I. X-ray spectroscopy and photometry

AuthorsI. Pillitteri (1), G. Micela (2), S. Sciortino (2), F. Damiani (2), F. R. Harnden Jr. (3)
Affiliation 1 Università di Palermo
2 INAF- Oss. Astronomico di Palermo
3 Harvard-Smithsonian Center for Astrophysics
Accepted byAstronomy & Astrophysics
Contactpilli@astropa.unipa.it
URL
Links Blanco 1

Abstract

We present an X-ray study of the high metallicity young open cluster Blanco 1 based on XMM--Newton data. X-ray spectroscopy of cluster members is presented for the first time as well as new X-ray distribution functions of late-type stars. We detected all known dF and dG stars in the EPIC field and 80% and 90% of dK and dM stars, respectively. The X-ray spectral analysis of the X-ray brightest cluster stars and X-ray color analysis of a larger sample show that a model with two temperatures (at about 0.3 and 1 keV) explains the quiescent activity phase spectra. We discuss also the nature of unidentified X-ray sources in the observed region and their X-ray spectral properties.