Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004head....8.3803b&link_type=abstract
American Astronomical Society, HEAD meeting #8, #38.03; Bulletin of the American Astronomical Society, Vol. 36, p.1203
Astronomy and Astrophysics
Astronomy
Scientific paper
Very-high-energy gamma-ray flares of TeV blazars are generally accompanied by simultaneous flaring activity in X-rays. The recent observations by the Whipple collaboration of an ``orphan'' TeV flare of 1ES 1959+650 (without simultaneous X-ray flare) is very hard to reconcile with standard leptonic SSC model routinely and usually very successfully employed to explain the SED and spectral variability of TeV blazars. In this paper, we suggest an alternative scenario in which the ``orphan'' TeV flare may originate from relativistic protons, interacting with an external photon field supplied by electron-synchrotron radiation reflected off a dilute ``synchrotron mirror'' located at a few pc from the central black hole. While the external photons will be virtually ``invisible'' to the co-moving ultrarelativistic electrons in the jet due to Klein-Nishina effects, their Doppler boosted energy is high enough to excite the Delta resonance from relativistic protons with Lorentz factors of 103 - 104. This model is capable of explaining the ``orphan'' TeV flare of 1ES 1959+650 with plausible parameters, thus constraining the number and characteristic energy of relativistic protons in the jet of this blazar.
Boettcher Markus
Postnikov Sergey
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