Gamma-ray sources like V407 Cygni in symbiotic stars

Details Gamma-ray sources like V407 Cygni in symbiotic stars Gamma-ray sources like V407 Cygni in symbiotic stars

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011mnras.413l..11l&link_type=abstract

Monthly Notices of the Royal Astronomical Society: Letters, Volume 413, Issue 1, pp. L11-L14.

Astronomy and Astrophysics

Astronomy

3

Acceleration Of Particles, Binaries: Symbiotic, Stars: Individual: V407 Cygni, Gamma-Rays: General

Scientific paper

Using a simple accelerating model and an assumption that γ-rays originate from p-p collisions for a π0 model, we investigate γ-ray sources like V407 Cygni in symbiotic stars. The upper limit of their occurrence rate in the Galaxy is between 0.5 and 5 yr-1, indicating that they may be important sources of high-energy γ-rays. The maximum energies of the accelerated protons mainly distribute around 1011 eV, and barely reach 1015 eV. The novae occurring in D-type SSs with ONe white dwarfs and long orbital periods are good candidates for γ-ray sources. Due to a short orbital period which results in a short acceleration duration, the nova occurring in symbiotic star RS Oph cannot produce γ-ray emission like that in V407 Cygni.

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