Multi-TeV flaring from high energy blazars: An evidence of the photohadronic process. (arXiv:1909.10634v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Sahu_S/0/1/0/all/0/1">Sarira Sahu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Fortin_C/0/1/0/all/0/1">Carlos E. Lopez Fortin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nagataki_S/0/1/0/all/0/1">Shigehiro Nagataki</a>
The high energy peaked blazars are known to undergo episodes of flaring in
GeV-TeV gamma-rays involving different time scales and the flaring mechanism is
not well understood despite long term simultaneous multiwavelength
observations. These gamma-rays en route to Earth undergo attenuation by the
extra galactic background light. Using the photohadronic model, where the seed
photons follow a power-law spectrum and a template extragalactic background
light model, we derive a simple relation between the observed multi-TeV
gamma-ray flux and the intrinsic flux with a single parameter. We study 42
flaring epochs of 23 blazars and excellent fit to most of the observed spectra
are obtained, strengthening the photohadronic origin of multi-TeV gamma-rays.
We can also constrain the power spectrum of the seed photons during the flaring
period. The blazars of unknown redshifts, whose multi-TeV flaring spectra are
known, stringent bounds on the former can be placed using the photohadronic
model.
The high energy peaked blazars are known to undergo episodes of flaring in
GeV-TeV gamma-rays involving different time scales and the flaring mechanism is
not well understood despite long term simultaneous multiwavelength
observations. These gamma-rays en route to Earth undergo attenuation by the
extra galactic background light. Using the photohadronic model, where the seed
photons follow a power-law spectrum and a template extragalactic background
light model, we derive a simple relation between the observed multi-TeV
gamma-ray flux and the intrinsic flux with a single parameter. We study 42
flaring epochs of 23 blazars and excellent fit to most of the observed spectra
are obtained, strengthening the photohadronic origin of multi-TeV gamma-rays.
We can also constrain the power spectrum of the seed photons during the flaring
period. The blazars of unknown redshifts, whose multi-TeV flaring spectra are
known, stringent bounds on the former can be placed using the photohadronic
model.
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