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| Paper: |
Phase-dependent changes in the wind lines in the HMXRBs SMC X-1 and 4U1700-37 |
| Volume: |
348, Astrophysics in the Far Ultraviolet: Five Years of Discovery with FUSE |
| Page: |
263 |
| Authors: |
Iping, R.C.; Sonneborn, G.; Kaper, L.; Hammerschlag-Hensberge, G. |
| Abstract: |
The High Mass X-ray Binaries (HMXRB's) SMC X-1 and 4U1700- 37 have been observed with FUSE to study the effect of the X-ray source on the stellar wind of the primary. In both systems phase dependent changes in the wind lines have been observed, indicating the creation of a X-ray ionization zone in the stellar wind. The high X-ray luminosity of SMC X-1 ionizes much of the wind and leaves a Stroemgren zone. This disrupts the resonance-line acceleration of the wind in portions of the orbit, quencing the wind and disrupting the mass flow. A similar but less dramatic effect was found for the first time in 4U1700-37. This so-called Hatchett-McCray (HM) effect had been predicted for 4U1700-37, but was not previously detected. |
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