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T: Fachverband Teilchenphysik
T 115: Gamma Astronomy V
T 115.5: Talk
Thursday, March 23, 2023, 16:50–17:05, POT/0151
Evidence of hadronic origin of the gamma-ray emission from the nova RS Oph by the MAGIC telescopes — •David Green1, Vandad Fallah Ramazani2, Francesco Leone3, Rubén López-Coto4, Alicia López-Oramas5, and Julian Sitarek6 for the MAGIC collaboration — 1Max Planck Institute for Physics, Munich, Germany — 2Astronomisches Institut (AIRUB) Ruhr-Universität Bochum, Bochum, Germany — 3National Institute for Astrophysics, Rome, Italy — 4IAA-CSIC, Granada, Spain — 5Instituto de Astrofísica de Canarias, Tenerife, Spain — 6University of Lodz, Faculty of Physics and Applied Informatics, Department of Astrophysics, Lodz, Poland
RS Ophiuchi (RS Oph) is a symbiotic recurrent nova that shows eruptive events roughly every 15 years. On August 8th, 2021, RS Oph erupted with its latest outburst. This event was detected by a wide range of multi-wavelength (MWL) instruments from radio up to very-high-energy (VHE) gamma rays. The MAGIC telescopes followed up on optical and high-energy triggers and initiated an observation campaign from August 9th till September 1st. RS Oph is the first nova detected in the VHE gamma-ray energy range. We report on the detection of VHE gamma rays at a significant level of 13.2σ during the first 4 days of RS Oph with the MAGIC telescopes. We combine the VHE emission detected by MAGIC with optical and high-energy observations and conclude RS Oph accelerated hadrons during its eruption. We will present the MWL modeling revealing this hadronic emission, and its further implications for Galactic cosmic-rays.