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- W2022896710 abstract "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." @default.
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- W2022896710 date "2010-01-01" @default.
- W2022896710 modified "2023-09-26" @default.
- W2022896710 title "Suzaku monitoring of the Wolf-Rayet binary WR140" @default.
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- W2022896710 doi "https://doi.org/10.1063/1.3475366" @default.
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