Actions for Gamma-Ray Emission Concurrent with the Nova in the Symbiotic Binary V407 Cygni [electronic resource].

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Gamma-Ray Emission Concurrent with the Nova in the Symbiotic Binary V407 Cygni [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2010.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
pages 817-821 : digital, PDF file
Additional Creators
United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Novae are thermonuclear explosions on a white dwarf surface fueled by mass accreted from a companion star. Current physical models posit that shocked expanding gas from the nova shell can produce x-ray emission, but emission at higher energies has not been widely expected. Here in this paper, we report the Fermi Large Area Telescope detection of variable γ-ray emission (0.1 to 10 billion electron volts) from the recently detected optical nova of the symbiotic star V407 Cygni. We propose that the material of the nova shell interacts with the dense ambient medium of the red giant primary and that particles can be accelerated effectively to produce π0 decay γ-rays from proton-proton interactions. Lastly, emission involving inverse Compton scattering of the red giant radiation is also considered and is not ruled out.
Report Numbers
E 1.99:1357543
Subject(s)
Note
Published through SciTech Connect.
08/13/2010.
Science 329 5993 ISSN 0036-8075 AM
Abdo, A.; Ackermann, M.; Ajello, M.; Atwood, W.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Bechtol, K.; Bellazzini, R.; Berenji, B.; Blandford, R.; Bloom, E.; Bonamente, E.; Borgland, A.; Bouvier, A.; Brandt, T.; Bregeon, J.; Brez, A.; Brigida, M.; Bruel, P.; Buehler, R.; Burnett, T.; Buson, S.; Caliandro, G.; et al.
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Funding Information
AC02-76SF00515
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