The Jet And X-ray Corona Of Cygnus X-1

Details The Jet And X-ray Corona Of Cygnus X-1 The Jet And X-ray Corona Of Cygnus X-1

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.1106m&link_type=abstract

American Astronomical Society, HEAD meeting #11, #11.06; Bulletin of the American Astronomical Society, Vol. 41, p.672

Astronomy and Astrophysics

Astronomy

Scientific paper

We investigate the energetics of the jet and X-ray corona of Cyg X-1. We show that the current estimates of the jet power obtained from Hα and [OIII] measurements of the optical nebula surrounding the X-ray source allow one to constrain the bulk velocity of the jet. It is definitely relativistic (v > 0.1c) and most probably in the range (0.3-0.8)c. The exact value of the velocity depends on the accretion efficiency which appears to be comparable in both spectral states. We then show that the X-ray emission does not originate in the jet. Indeed, the energy budget does not allow the corona to be ejected to infinity at relativistic speed. Rather, either a small fraction of the corona escapes to infinity or the ejection velocity of the corona is vanishingly low.

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