Modelling the TeV gamma-ray spectra of two low redshift AGNs: Mkn 501 and Mkn 421

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dc.creatorKonopelko, Alexander K.
dc.creatorMastichiadis, Apostolos
dc.creatorKirk, John G.
dc.creatorde Jager, Ocker C.
dc.creatorStecker, Floyd W.
dc.date2003-02-04
dc.date.accessioned2026-07-07T11:29:04Z
dc.date.available2026-07-07T11:29:04Z
dc.descriptionWe discuss the results of modelling 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 = 1.5x10^5). 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 mc^2 at which electrons are injected.
dc.description28 pages, 7 figures, accepted for publication in The Astrophysical Journal
dc.identifierhttps://arxiv.org/abs/astro-ph/0302049
dc.identifierhttp://arxiv.org/abs/astro-ph/0302049
dc.identifierAstrophys.J.597:851-859,2003
dc.identifierdoi:10.1086/374593
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/196592
dc.subjectAstrophysics
dc.titleModelling the TeV gamma-ray spectra of two low redshift AGNs: Mkn 501 and Mkn 421
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