The Fermi-LAT Collaboration's scientific contributions

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Publications (1)

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

August 2014

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31 Reads

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165 Citations

Science

The Fermi-LAT Collaboration

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 gamma rays and stood in contrast to the first gamma-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 gamma-ray sources detected over 2-3 week durations. The gamma-ray detections point to unexpected high-energy particle acceleration processes linked to the mass ejection from thermonuclear explosions in an unanticipated class of Galactic gamma-ray sources.

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Citations (1)

... Symbiotic novae have an evolved companion (e.g. red giant) with a dense wind as opposed to a main-sequence companion for classical novae (Ackermann et al. 2014). Current physical models suggest that shocked expanding gas from the symbiotic nova shell interacts with the dense wind of the red giant, and that particles can be accelerated effectively to produce π 0 decay γ-rays from proton-proton interactions (Franckowiak et al. 2018). ...

Reference:

A comprehensive analysis toward the Fermi-LAT source 4FGL J1846.9-0227 -- Jets of a proto-planetary nebula producing gamma-rays?
Fermi Establishes Classical Novae as a Distinct Class of Gamma-Ray Sources
  • Citing Article

  • August 2014

Science

The Fermi-LAT Collaboration