Classical novae are cataclysmic binary star systems in which the matter of a companion star is accreted on a white dwarf1,2. Accumulation of hydrogen in a layer eventually causes a thermonuclear explosion on the surface of the white dwarf3, brightening the white dwarf to ~105 solar luminosities and triggering ejection of the accumulated matter. Novae provide the extreme conditions required to accelerate particles, electrons or protons, to high energies. Here we present the detection of gamma rays by the MAGIC telescopes from the 2021 outburst of RS Ophiuchi, a recurrent nova with a red giant companion, which allowed us to accurately characterize the emission from a nova in the 60 GeV to 250 GeV energy range. The theoretical interpretation of the combined Fermi LAT and MAGIC data suggests that protons are accelerated to hundreds of gigaelectronvolts in the nova shock. Such protons should create bubbles of enhanced cosmic ray density, of the order of 10 pc, from the recurrent novae.

Acciari, V.A., Ansoldi, S., Antonelli, L.A., Arbet Engels, A., Artero, M., Asano, K., et al. (2022). Proton acceleration in thermonuclear nova explosions revealed by gamma rays. NATURE ASTRONOMY, 6(6), 689-697 [10.1038/s41550-022-01640-z].

Proton acceleration in thermonuclear nova explosions revealed by gamma rays

L. Bellizzi
Membro del Collaboration Group
;
G. Bonnoli
Investigation
;
P. Da Vela
Membro del Collaboration Group
;
A. De Angelis
Supervision
;
S. Menchiari
Membro del Collaboration Group
;
R. Paoletti
Membro del Collaboration Group
;
P. G. Prada Moroni
Membro del Collaboration Group
;
A. Rugliancich
Membro del Collaboration Group
;
A. Stamerra
Supervision
;
S. Truzzi
Membro del Collaboration Group
;
S. Ventura
Membro del Collaboration Group
;
C. Wunderlich
Membro del Collaboration Group
;
2022

Abstract

Classical novae are cataclysmic binary star systems in which the matter of a companion star is accreted on a white dwarf1,2. Accumulation of hydrogen in a layer eventually causes a thermonuclear explosion on the surface of the white dwarf3, brightening the white dwarf to ~105 solar luminosities and triggering ejection of the accumulated matter. Novae provide the extreme conditions required to accelerate particles, electrons or protons, to high energies. Here we present the detection of gamma rays by the MAGIC telescopes from the 2021 outburst of RS Ophiuchi, a recurrent nova with a red giant companion, which allowed us to accurately characterize the emission from a nova in the 60 GeV to 250 GeV energy range. The theoretical interpretation of the combined Fermi LAT and MAGIC data suggests that protons are accelerated to hundreds of gigaelectronvolts in the nova shock. Such protons should create bubbles of enhanced cosmic ray density, of the order of 10 pc, from the recurrent novae.
Acciari, V.A., Ansoldi, S., Antonelli, L.A., Arbet Engels, A., Artero, M., Asano, K., et al. (2022). Proton acceleration in thermonuclear nova explosions revealed by gamma rays. NATURE ASTRONOMY, 6(6), 689-697 [10.1038/s41550-022-01640-z].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1216955