Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-01-28
Astronomy and Astrophysics
Astrophysics
15 pages including 3 figures, requires AAS Latex macros, accepted for publication in The Astrophysical Journal
Scientific paper
10.1086/304227
The beaming pattern of thermal annihilation radiation is broader than the beaming pattern produced by isotropic nonthermal electrons and positrons in the jets of radio-emitting active galactic nuclei which Compton scatter photons from an external isotropic radiation field. Thus blueshifted thermal annihilation radiation can provide the dominant contribution to the high-energy radiation spectrum at observing angles theta > 1/Gamma, where Gamma is the bulk Lorentz factor of the outflowing plasma. This effect may account for the spectral features of MeV blazars discovered with the Compton Telescope on the Compton Gamma Ray Observatory. Coordinated gamma-ray observations of annihilation line radiation to infer Doppler factors and VLBI radio observations to measure transverse angular speeds of outflowing plasma blobs can be used to determine the Hubble constant.
Dermer Carles D.
Schlickeiser Reinhard
Skibo Jeffery G.
No associations
LandOfFree
The Beaming Pattern of Doppler Boosted Thermal Annihilation Radiation: Application to MeV Blazars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Beaming Pattern of Doppler Boosted Thermal Annihilation Radiation: Application to MeV Blazars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Beaming Pattern of Doppler Boosted Thermal Annihilation Radiation: Application to MeV Blazars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-597037