Hamburg 2016 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 104: Gammaastronomie V
T 104.3: Vortrag
Donnerstag, 3. März 2016, 17:15–17:30, VMP9 SR 27
Implication of the detection of very hard spectra from the TeV blazar Mrk 501 — •Amit Shukla1, Karl Mannheim2, Varsha R. Chitnis3, Jayashree Roy4, Bannanje Sripathi Acharya4, Daniela Dorner2, Gareth Hughes1, and Adrian Biland1 — 1ETH Zurich, Institute for Particle Physics, Otto-Stern-Weg 5, 8093 Zurich, — 2Institute for Theoretical Physics and Astrophysics, Universität Würzburg, 97074 — 3Department of High Energy Physics, Tata Institute of Fundamental Research, Mumbai — 4Center for Excellence in Basic Sciences, UM-DAE Mumbai 400005, India
The emission from active galactic nuclei ranges from radio to TeV energies and shows high variability. The origin of the high energy emission is highly debated. The observed emission could be due to a complex superposition of emission from multiple zones. New evidence of the detection of very hard intrinsic gamma-ray spectra obtained from Fermi-LAT observations have challenged the theories about origin of VHE gamma-rays. We have used the 7 years of Fermi-LAT data to search for time intervals with unusually hard spectra from the nearby TeV blazar Mrk 501. In the presentation, we discuss a few possible explanations for the origin of these hard spectra within a leptonic scenario.