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. 2014 Aug 1;345(6196):554-8.
doi: 10.1126/science.1253947.

Novae. Fermi Establishes Classical Novae as a Distinct Class of Gamma-Ray Sources

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Novae. Fermi Establishes Classical Novae as a Distinct Class of Gamma-Ray Sources

Fermi-LAT Collaboration. Science. .
Free article

Abstract

A classical nova results from runaway thermonuclear explosions on the surface of a white dwarf that accretes matter from a low-mass main-sequence stellar companion. In 2012 and 2013, three novae were detected in γ rays and stood in contrast to the first γ-ray-detected nova V407 Cygni 2010, which belongs to a rare class of symbiotic binary systems. Despite likely differences in the compositions and masses of their white dwarf progenitors, the three classical novae are similarly characterized as soft-spectrum transient γ-ray sources detected over 2- to 3-week durations. The γ-ray detections point to unexpected high-energy particle acceleration processes linked to the mass ejection from thermonuclear explosions in an unanticipated class of Galactic γ-ray sources.

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