A long-term modulation in XTE J1716−389: an SS433-like system |
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| Authors: | R Cornelisse P A Charles C Robertson |
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| Institution: | School of Physics &Astronomy, University of Southampton, Highfield Campus, Southampton SO17 1BJ;South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa |
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| Abstract: | We report on the properties of a 99.3-d periodic modulation in the X-ray transient XTE J1716?389. We associate this source with the transient KS J1716?389, first detected by the Mir /Kvant module in 1994. The spectral characteristics of XTE J1716?389, a high intrinsic absorption column, strong emission features and a power-law spectrum, make it very similar to the class of highly absorbed X-ray binaries detected by INTEGRAL . We associate the 99.3-d periodic behaviour with the geometrical obscuration that results from a precessing circumbinary disc that is moving in and out of the field of view, comparable to what has been proposed for SS 433. We therefore propose that XTE J1716?389 is a high-mass X-ray binary with a supergiant companion that is similar not only to SS 433, but also to the new class of highly obscured X-ray binaries, suggesting that SS 433 is a member of much wider population that is now being detected by INTEGRAL . |
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| Keywords: | accretion accretion discs stars: individual: XTE J1716?389 X-rays: binaries |
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