Phase-dependent changes in the wind lines in the HMXRBs SMC X-1 and 4U1700-37

Details Phase-dependent changes in the wind lines in the HMXRBs SMC X-1 and 4U1700-37 Phase-dependent changes in the wind lines in the HMXRBs SMC X-1 and 4U1700-37

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..348..263i&link_type=abstract

Astrophysics in the Far Ultraviolet: Five Years of Discovery with FUSE ASP Conference Series, Vol. 348, Proceedings of the Confe

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

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 Strömgren 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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