Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21710806w&link_type=abstract
American Astronomical Society, AAS Meeting #217, #108.06; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
We report the Fermi-LAT discovery of variable >100 MeV gamma-ray emission from the optical nova of the symbiotic star V407 Cygni in March 2010, the first detection of gamma-rays in the GeV band from any nova. The spectrum and light curve of the gamma-ray emission can be understood broadly as consequences of shock acceleration in the nova shell as it interacts with the dense ambient medium of the red giant companion. Viable gamma-ray production mechanisms via pi-0 decay from proton-proton interactions and inverse Compton scattering of the radiation from the red giant are outlined.
Cheung Charlotte
Hill Adam B.
Jean Pierre
Razzaque Soebur
Wood Kent S.
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