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GeV-TeV gamma-rays and neutrinos from the Nova V407 Cygni

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arxiv 1208.6200 v1 pith:XRNIZ2D3 submitted 2012-08-30 astro-ph.HE astro-ph.GA

classification astro-ph.HEastro-ph.GA
keywords gamma-raysneutrinosnovaradiationv407accelerationcygniduring
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The Fermi-LAT telescope has unexpectedly discovered GeV gamma-ray emission from the symbiotic Nova V407 Cygni. We investigate the radiation processes due to electrons and hadrons accelerated during the explosion of this Nova. We consider a scenario in which GeV gamma-ray emission observed by Fermi is produced by the electrons with energies of a few tens of GeV in the inverse Compton scattering of stellar radiation. On the other hand, the hadrons are expected to reach larger energies, due to the lack of radiation losses during acceleration process, producing TeV gamma-rays and neutrinos. We predict the fluxes of very high energy gamma-rays and neutrinos from Novae of the V407 type for two models of hadron acceleration and discuss their possible detectability by the present and future telescopes (e.g. IceCube, CTA)

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  1. An Optically Motivated Gamma-ray Study of Fermi-LAT Novae

    astro-ph.HE 2026-08 conditional novelty 6.0 of 10

    For 26 Fermi-LAT novae, the optical three-magnitude decay time is the most common time window that maximizes gamma-ray detection significance.

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