Multi-TeV flaring from blazars: Markarian 421 as a case study

Journal Article · Mon Mar 07 04:00:00 UTC 2016 · European Physical Journal. C, Particles and Fields

DOI: https://doi.org/10.1140/epjc/s10052-016-3975-2 · OSTI ID:1411629

Sahu, Sarira ^[1]; Miranda, Luis Salvador ^[1]; Rajpoot, Subhash ^[2]

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1. Univ. Nacional Autonoma de Mexico (Mexico)
2. California State Univ., Long Beach, CA (United States)

The TeV blazar Markarian 421 underwent multi-TeV flaring during April 2004 and simultaneously observations in the X-ray and TeV energies were made. It was observed that the TeV outbursts had no counterparts in the lower energy range. One implication of this is that it might be an orphan flare. We show that Fermi-accelerated protons of energy ≤168 TeV can interact with the low energy tail of the background synchrotron self-Compton photons in the inner region of the blazar to produce the multi-TeV flare and our results fit very well with the observed spectrum. Based on our study, we predict that the blazars with a deep valley in between the end of the synchrotron spectrum and the beginning of the SSC spectrum are possible candidates for orphan flaring. Future possible candidates for this scenario are the HBLs Mrk 501 and PG 1553 + 113 objects.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: AC02-05CH11231
• OSTI ID: 1411629
• Journal Information: European Physical Journal. C, Particles and Fields, Journal Name: European Physical Journal. C, Particles and Fields Journal Issue: 3 Vol. 76; ISSN 1434-6044
• Publisher: SpringerCopyright Statement
• Country of Publication: United States
• Language: English