Suzaku observations of the massive twin star HD159176

Details Suzaku observations of the massive twin star HD159176 Suzaku observations of the massive twin star HD159176

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010fym..confp..36y&link_type=abstract

"The First Year of MAXI: Monitoring Variable X-ray Sources", Poster Presentations, 4th International MAXI Workshop held November

Computer Science

Scientific paper

HD159176 is a close binary system which is composed with O7V+O7V type stars. The system is in the young open cluster NGC6383 with a distance of about 1.5 kpc. With almost the same masses, the two stars orbit circularly with a separation of two stellar radii with an orbital period of 3.367 days (Pachoulakis 1995, MNRAS, 280, 153). On this target, one report exists which treated the results of an XMM-Newton observation which was executed in 2004. To investigate the long-term variability, we observed the binary on Feb. 19th 2010 with Suzaku satellite. The Suzaku data showed spectral hardening above 2 keV and showed brighter flux by twice than that of XMM-Newton. We will discuss the origin of the spectral changes in the poster.

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