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          Institute: MPI für Kernphysik     Collection: Theoretical Astrophysics     Display Documents



ID: 43754.0, MPI für Kernphysik / Theoretical Astrophysics
Models of Tev Blazars
Authors:Mastichiadis, A.; Konopelko, A.; Kirk, J. G.; deJager, O. C.; Stecker, F. W.
Language:English
Publisher:IAU
Title of Proceedings:Quasar Cores and Jets, 25th meeting of the IAU, Joint Discussion 18, 23-24 July 2003, Sydney, Australia
Name of Conference/Meeting:Quasar Cores and Jets, 25th meeting of the IAU, Joint Discussion 18
Place of Conference/Meeting:Sydney
(Start) Date of Conference/Meeting
 (YYYY-MM-DD):
2003-07-23
End Date of Conference/Meeting 
 (YYYY-MM-DD):
2003-07-24
Review Status:not specified
Audience:Experts Only
Abstract / Description:The time-dependent one-zone model for blazar emission is reviewed. An application is made for the TeV gamma-ray spectra of two AGNs Mkn 501 and Mkn 421 that have almost the same redshifts: z=0.031 and z=0.034 respectively. The effect of intergalactic gamma-ray absorption is treated as an uncertainty in the measurement of the intrinsic spectrum. Although the objects differ we obtain satisfactory fits for both of them in a synchrotron self-Compton scenario. Compared to previous models our fits are characterised by higher values of the Doppler factor (>= 50) and an electron injection spectrum extending to higher energies (Gmax = 1.5x105). In the case of Mkn 421 the observed difference in spectral slope in X-rays and TeV gamma-rays between the high and low states can be explained as a variation of a single parameter - the maximum energy Gmax mc2 at which electrons are injected. These results are discussed with respect to recent particle acceleration theories in blazar jets.
External Publication Status:accepted
Document Type:Conference-Paper
Affiliations:MPI für Kernphysik/Group H. J. Völk/Theoretical Astrophysics (F. Aharonian, J. Kirk)
External Affiliations:University of Athens, Potchefstroom University), NASA/Goddard Space Flight Center
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