Fermi Gamma-ray Space Telescope

A Systematic Search of Gamma-ray Emission from Black Hole X-ray Binaries

A. K. H. Kong
on behalf of the Fermi Asian Network

Abstract:

Black hole X-ray binaries are known to be strong X-ray sources and some of them also emit MeV gamma-rays. It is generally believed that outflow and corona play important roles in the soft gamma-ray emission mechanisms of accreting black hole systems. In GeV gamma-ray, however, no convincing detection has been reported for confirmed black hole binaries. In theory, GeV gamma-rays from accreting black hole binaries are expected via synchrotron radiation or inverse Compton scattering from relativistic jets/outflows. More recently, it has been suggested that the rotational energy of a black hole can be efficiently converted into gamma-rays by applying the pulsar outer-gap model to the black hole magnetosphere. In this presentation, we report our preliminary results of a systematic search for gamma-ray emission of a sample of black hole X-ray binaries by using the PASS8 data.