High energy emission of symbiotic recurrent novae: RS Ophiuchi and V407 Cygni

Details High energy emission of symbiotic recurrent novae: RS Ophiuchi and V407 Cygni High energy emission of symbiotic recurrent novae: RS Ophiuchi and V407 Cygni

2011-11-17

arxiv.org/abs/1111.4129v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

6 pages, 4 figures; to appear in the proceedings of the Asiago Workshop on Symbiotic Stars, A. Siviero and U. Munari eds., Bal

Scientific paper

Recurrent novae occurring in symbiotic binaries are candidate sources of high energy photons, reaching GeV energies. Such emission is a consequence of particle acceleration leading to pion production. The shock between matter ejected by the white dwarf, undergoing a nova explosion, and the wind from the red giant companion is responsible for such a process, which mimics a supernova remnant but with much smaller energetic output and much shorter time scales. Inverse Compton can also be responsible for high energy emission. Recent examples are V407 Cyg, detected by Fermi, and RS Oph, which unfortunately exploded in 2006, before Fermi was launched.

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