Location of the TeV-emitting region in PKS 2155-304

Details Location of the TeV-emitting region in PKS 2155-304 Location of the TeV-emitting region in PKS 2155-304

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1085..652b&link_type=abstract

HIGH ENERGY GAMMA-RAY ASTRONOMY: Proceedings of the 4th International Meeting on High Energy Gamma-Ray Astronomy. AIP Conferenc

Astronomy and Astrophysics

Astronomy

Gamma-Ray, Galactic Nuclei, Circumnuclear Matter, And Bulges, Active And Peculiar Galaxies And Related Systems

Scientific paper

We consider the opacity of TeV gamma rays emitted by the blazar PKS 2155-304 resulting from pair production on soft photons emitted by the accretion disk. If the accretion disk emits radiation at anything like the flux implied by the standard Shakura-Sunyaev model then the gamma rays must have been emitted from of order 100 gravitational radii from the black hole. If the disk radiation is significantly suppressed as a result of gravitational power being channelled into a disk wind then it is possible that the TeV gamma rays could have been emitted from within a few gravitational radii of the black hole.

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