Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1248....9s&link_type=abstract
X-RAY ASTRONOMY 2009; PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES: Proceedings of the International Confer
Astronomy and Astrophysics
Astronomy
1
Stellar Winds, Binary Stars, X-Ray Spectroscopy, Plasma, Mass Loss And Stellar Winds, Astrometric And Interferometric Binaries, X-Ray, Magnetohydrodynamics And Plasmas
Scientific paper
We report the preliminary results of the Suzaku observations of the W-R binary WR 140 (WC7+O5I). We executed the observations at four different epochs around periastron passage in Jan. 2009 to understand the W-R stellar wind as well as the wind-wind collision shocks. The total exposure was 210 ksec. We detected hard X-ray excess in the HXD band (>10 keV) for the first time from a W-R binary. Another notable discovery was a soft component which is not absorbed even by the dense wind. The spectra can be fitted by three different components; one is for the stationary cool component with kT ~0.1 keV, one for a dominant high temperature component with kT ~3 keV, and one for the hardest power-low component with Γ~2. The column density at periastron is 30 times higher than that at pre-periastron, which can be explained as self-absorption by the W-R wind. The emission measure of the dominant, high temperature component is not inversely proportional to the distance between the two stars.
Hamaguchi Kenji
Maeda Yoshitomo
Sugawara Yasuharu
Tsuboi Yohko
No associations
LandOfFree
Suzaku monitoring of the Wolf-Rayet binary WR140 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Suzaku monitoring of the Wolf-Rayet binary WR140, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Suzaku monitoring of the Wolf-Rayet binary WR140 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1644123