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

I. Pillitteri·G. Micela·S. Sciortino·F. Damiani·F. R. Harnden Jr
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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.

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I. Pillitteri, G. Micela, S. Sciortino, F. Damiani, F. R. Harnden Jr. 2004-03-12. XMM-Newton observation of the young open cluster Blanco 1. I. X-ray spectroscopy and photometry. https://doi.org/10.1051/0004-6361%3A20035869

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