Multi-TeV flaring in nearby High Energy Blazars: A photohadronic scenario. (arXiv:1907.01174v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Sahu_S/0/1/0/all/0/1">Sarira Sahu</a>
Blazars are a subclass of AGN and flaring in multi-TeV gamma-ray seems to be
the major activity in high energy blazars a subgrup of blazars. Flaring is also
unpredictable and switches between quiescent and active states involving
different time scales and fluxes. While in some high energy blazars a strong
temporal correlation between X-ray and multi-TeV gamma-ray has been observed,
outbursts in some other have no low energy counterparts and explanation of such
extreme activity needs to be addressed through different mechanisms as it is
not understood well. The extragalactic background light (EBL) plays an
important role in the observation of these high energy gamma-rays as it
attenuates through pair production of electron-positron and also changes the
spectral shape of the high energy photons. In the context of the photohadronic
model and taking EBL correction into account, flaring can be explained very
well. In a series of papers we have developed this model to explain multi-TeV
flaring events form many blazars. Here in this review, the photohadronic model
is discussed and applied to explain the multi-TeV flaring from nearby high
energy blazars: Markarian 421, Markarian 501 and 1ES1959+650.
Blazars are a subclass of AGN and flaring in multi-TeV gamma-ray seems to be
the major activity in high energy blazars a subgrup of blazars. Flaring is also
unpredictable and switches between quiescent and active states involving
different time scales and fluxes. While in some high energy blazars a strong
temporal correlation between X-ray and multi-TeV gamma-ray has been observed,
outbursts in some other have no low energy counterparts and explanation of such
extreme activity needs to be addressed through different mechanisms as it is
not understood well. The extragalactic background light (EBL) plays an
important role in the observation of these high energy gamma-rays as it
attenuates through pair production of electron-positron and also changes the
spectral shape of the high energy photons. In the context of the photohadronic
model and taking EBL correction into account, flaring can be explained very
well. In a series of papers we have developed this model to explain multi-TeV
flaring events form many blazars. Here in this review, the photohadronic model
is discussed and applied to explain the multi-TeV flaring from nearby high
energy blazars: Markarian 421, Markarian 501 and 1ES1959+650.
http://arxiv.org/icons/sfx.gif
