Scientific Seminars

Powering black hole X-ray binary jets

Elena Gallo
Univ. of Michigan (USA)

2012-05-04    11:00    Brera - Saletta corridoio Strumenti

After briefly reviewing the radio and X-ray properties of black hole X-ray binaries, I will critically assess the paradigm of the dependency of jet power on black hole spin in these systems. Recent works have shown that the luminosity of steady, compact jets does not correlate with reported black hole spin measurements, arguing against extraction of spin energy as the main driver mechanisms. While undergoing state transitions, however, black hole X-ray binaries are known to power transient, large scale jets with high relativistic velocities. It has been argued that, for a handful of sources, the power in those jets positive correlates with the spin parameter as measured from thermal X-ray continuum fitting methods. In this talk, I will revisit those claims, showing that no correlation is found in all cases.