Charles, P. A; Barnes, A. D; Casares, J.; Clark, J. S.; Clarkson, W. I; Harlaftis, E. T; Hynes, R. I; Marsh, T. R and Steeghs, D.
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SS433 is the prototype microquasar in the Galaxy and may even be analogous to the ULX sources if the jets’ kinetic energy is taken into account. However, in spite of 20 years of study, our constraints on the nature of the binary system are extremely limited as a result of the difficulty of locating spectral features that can reveal the nature and motion of the mass donor. Newly acquired, high resolution blue spectra taken when the (precessing) disc is edge-on suggest that the binary is close to a common-envelope phase, and hence providing kinematic constraints is extremely difficult. Nevertheless, we do find evidence for a massive donor, as expected for the inferred very high mass transfer rate, and we compare SS433’s properties with those of Cyg X-3.
|Item Type:||Conference Item|
|Copyright Holders:||2004: IA, UNAM|
|Extra Information:||RevMexAA(SC) Vol 20
Proceedings Editors: Gaghik Tovmassian & Edward Sion
|Academic Unit/Department:||Science > Physical Sciences|
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)|
|Depositing User:||Users 9108 not found.|
|Date Deposited:||09 Dec 2009 10:28|
|Last Modified:||02 Dec 2010 20:42|
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