Disentangling the High-Energy sources in the peculiar magnetic star HD191612

Details Disentangling the High-Energy sources in the peculiar magnetic star HD191612 Disentangling the High-Energy sources in the peculiar magnetic star HD191612

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006xmm..prop...18n&link_type=abstract

XMM-Newton Proposal ID #05006801

Computer Science

Stars, White Dwarfs, Solar System, Hd191612, Xmm-Newton Proposal 05006801

Scientific paper

The peculiar star HD191612 has been followed both in the visible and X-ray ranges. In the visible domain, this star displays spectacular line profile variations alternating between two different spectral states (O6-O8) with a period of ~538d. Observations with XMM over half this timescale have revealed an overluminosity compared to typical O-type stars and some variations, about 30% in flux. However, the origin of the X-rays is still unclear: since a recent study unveiled the binarity of the star (with an orbital period of 1540d), a colliding wind phenomenon might contribute to the bright emission. To assess the origin of the X-ray emission in this peculiar star, an additional observation with XMM-Newton is needed.

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