6–9 Sept 2022
Physics Department, University "La Sapienza", Roma, Italy
Europe/Rome timezone

Revealing time-resolved hadronic particle acceleration in the recurrent nova RS Ophuichi with H.E.S.S.

8 Sept 2022, 16:54
18m
Aula Conversi (Physics Department, University "La Sapienza", Roma, Italy)

Aula Conversi

Physics Department, University "La Sapienza", Roma, Italy

Speaker

Alison Mitchell

Description

Recurrent Novae (RNe) are known to experience multiple eruptions in the form of thermonuclear explosions, due to the accumulation of material accreted by a white dwarf from a binary companion star.
The well known RN RS Ophiuchi (RS Oph) underwent its latest eruption in 2021 and triggered numerous follow-up observations world wide, including with the High Energy Stereoscopic System (H.E.S.S.), an array of Imaging Atmospheric Cherenkov Telescopes.
Non-thermal emission up to TeV energies is observed coincident with the Nova eruption within the first days and up to a month after the optical peak, establishing novae as Galactic transients reaching TeV energies.
Analysis and interpretation of the data identifies time-resolved acceleration of cosmic-rays, constraining models of particle energisation.
Combining the data taken by H.E.S.S. with concurrent observations taken by the Fermi-LAT, a similar temporal profile is observed, favouring a common origin to the emission.
In this talk, the detection of the non-thermal VHE emission from the RN RS Oph by H.E.S.S. will be presented and plausible models for the VHE emission discussed.

Primary author

Alison Mitchell

Presentation materials