Gamma-ray emission concurrent with the nova in the symbiotic binary V407 cygni
2010 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 329, no 5993, 817-821 p.Article in journal (Refereed) Published
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, 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. Emission involving inverse Compton scattering of the red giant radiation is also considered and is not ruled out.
Place, publisher, year, edition, pages
2010. Vol. 329, no 5993, 817-821 p.
proton, gamma ray radiation, numerical model, X-ray, ambient air, article, astronomy, controlled study, electric potential, electron, field emission, gamma radiation, gas, light scattering, molecular interaction, particle size, priority journal, radiation energy, symbiosis
IdentifiersURN: urn:nbn:se:kth:diva-149612DOI: 10.1126/science.1192537ISI: 000280809900044ScopusID: 2-s2.0-77955628305OAI: oai:DiVA.org:kth-149612DiVA: diva2:745460
FunderKnut and Alice Wallenberg FoundationSwedish Research Council
QC 201409102014-09-102014-08-252014-09-10Bibliographically approved