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On the reprocessing of gamma-rays produced by jets

Published online by Cambridge University Press:  24 February 2011

M. Orellana ,
L. J. Pellizza  and
G. E. Romero
M. Orellana
Affiliation:
Facultad de Cs. Astronómicas y Geofísicas - Universidad Nacional de La Plata, Argentina Departamento de Física y Astronomía, Universidad de Valparaíso, Chile email: [email protected]
L. J. Pellizza
Affiliation:
Instituto de Astronomía y Física del Espacio, UBA - CONICET, Argentina email: [email protected]
G. E. Romero
Affiliation:
Facultad de Cs. Astronómicas y Geofísicas - Universidad Nacional de La Plata, Argentina Instituto Argentino de Radioastronomía (IAR), CCT La Plata - CONICET, Argentina email: [email protected]
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Abstract

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Systems of two very different sizescales are known to produce very high-energy (VHE) radiation in their jets: AGNs and microquasars. The produced VHE photons (Eγ ~ 1 TeV) can be absorbed by the intense environmental soft photon fields, coming from the companion star (in high mass binaries) or from the accreting material (disk+corona in AGNs), as these are the dominant sources at energies around ~(mec2)2/Eγ. Energetic pairs are created by the photon-photon annihilation, and, depending on how efficient are the competing cooling channels, the absorption can lead to a reprocessing by Inverse Compton pair-cascade development. A self-consistent modeling of these systems as gamma-ray sources should then include, along with the emission and absorption processes, a thorough treatment of the pair cascades. We discuss here on this issue, focusing on our (preliminary) results of numerical simulations devoted to a study case similar to the high-mass microquasar candidate LS 5039.

Keywords

radiation mechanisms: nonthermalgamma rays: theory
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S275: Jets at all Scales , September 2010 , pp. 98 - 99
Copyright
Copyright © International Astronomical Union 2011

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