The Open UniversitySkip to content

SS433 and the nature of ultra-luminous X-ray sources

Clark, J. S. (2006). SS433 and the nature of ultra-luminous X-ray sources. Proceedings of the International Astronomical Union, 2(S238) pp. 219–224.

DOI (Digital Object Identifier) Link:
Google Scholar: Look up in Google Scholar


The prototypical micro-quasar, SS433, one of the most bizarre objects in the Galaxy, is a weak X-ray source, yet the kinetic energy of its relativistic, precessing jets is vastly greater. In spite of its importance as the nearest example of directly observable relativistic phenomena, we know remarkably little about the nature of this binary system. There are ongoing arguments not only about the mass of the compact object, but even as to whether it is a black hole or a neutron star, an argument that recent high resolution optical spectroscopy has contributed to.

Combined with the INTEGRAL discovery of a new class of highly obscured galactic high-mass X-ray binaries, one of which has been found to precess on a similar timescale to SS433, we suggest that these would indeed be seen by external observers as ULXs, once additional effects such as beaming (either relativistic or geometrical) are included.

Item Type: Journal Item
ISSN: 1743-9213
Keywords: Accretion, accretion disks – black hole physics – X-rays: binaries
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 15148
Depositing User: Astrid Peterkin
Date Deposited: 23 Mar 2009 13:51
Last Modified: 07 Dec 2018 09:20
Share this page:


Altmetrics from Altmetric

Citations from Dimensions

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU