RT Journal Article
T1 Proton acceleration in thermonuclear nova explosions revealed by gamma rays
A1 Baquero Larriva, Orlando Andrés
A1 Barrio Uña, Juan Abel
A1 Contreras González, José Luis
A1 Fonseca González, María Victoria
A1 Hoang, Kim Dinh
A1 López Moya, Marcos
A1 Mas Aguilar, Alvaro
A1 Miener, Tjark
A1 Morcuende, D.
A1 Peñil Del Campo, Pablo
AB Classical novae are cataclysmic binary star systems in which the matter of a companion star is accreted on a white dwarf(1,2). Accumulation of hydrogen in a layer eventually causes a thermonuclear explosion on the surface of the white dwarf(3), brightening the white dwarf to similar to 10(5) 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.
PB Nature Publishing Group
SN 2397-3366
YR 2022
FD 2022
LK https://hdl.handle.net/20.500.14352/71450
UL https://hdl.handle.net/20.500.14352/71450
LA eng
NO Artículo escrito por 210 autores. We thank the Instituto de Astrofísica de Canarias for the excellent working conditions at the Observatorio del Roque de los Muchachos in La Palma. The financial support of the German BMBF, MPG and HGF; the Italian INFN and INAF; the Swiss National Fund SNF; the ERDF under the Spanish Ministerio de Ciencia e Innovacion (MICINN) (PID2019-104114RB-C31, PID2019-104114RB-C32, PID2019-104114RB-C33, PID2019-105510GB-C31,PID2019-107847RB-C41, PID2019-107847RB-C42, PID2019107847RB-C44, PID2019-107988GB-C22); the Indian Department of Atomic Energy; the Japanese ICRR, the University of Tokyo, JSPS and MEXT; the Bulgarian Ministry of Education and Science, National RI Roadmap Project DO1-400/18.12.2020, and the Academy of Finland grant number 320045 is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia Severo Ochoa (SEV-2016-0588, SEV2017-0709, CEX2019-000920-S), the Unidad de Excelencia Maria de Maeztu (CEX2019000918-M, MDM-2015-0509-18-2) and the CERCA programme of the Generalitat de Catalunya; by the Croatian Science Foundation (HrZZ) project IP-2016-06-9782 and the University of Rijeka Project uniri-prirod-18-48; by the DFG Collaborative Research Centres SFB823/C4 and SFB876/C3; by the Polish National Research Centre grant UMO2016/22/M/ST9/00382 and by the Brazilian MCTIC, CNPq and FAPERJ. The TJO of the Montsec Observatory (OdM) is owned by the Catalan Government and operated by the Institute for Space Studies of Catalonia (IEEC). We acknowledge with thanks the variable star observations from the AAVSO International Database contributed by observers worldwide and used in this research. We gratefully acknowledge the prompt response to the alert and the data provided by the CAOS Team. We acknowledge with thanks the ARAS database27 (https://aras-database.github.io/database/index.html).The observers who contributed worldwide data used in this research are O. Garde, V. Lecoq, L. Franco, F. Teyssier, O. Thizy, C. Boussin, P. A. Dubovsky and D. Boyd. We thank G. Principe for the advice in extending the Fermi LAT analysis below 100 MeV and F. D'Ammando for his comments on the manuscript. R.L.-C.'s work was financially supported by the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement 754496-FELLINI.
NO Unión Europea. Horizonte 2020
NO Ministerio de Ciencia e Innovación (MICINN)/FEDER
NO Centro de Excelencia Severo Ochoa
NO Unidad de Excelencia María de Maeztu
NO MPGMax Planck Society
NO HGF
NO Italian INFN Istituto Nazionale di Fisica Nucleare (INFN)
NO INAF Istituto Nazionale Astrofisica (INAF)
NO Swiss National Fund SNF Swiss National Science Foundation (SNSF)
NO Indian Department of Atomic Energy
NO Japanese ICRR
NO University of Tokyo
NO JSPS Ministry of Education, Culture, Sports, Science and Technology, Japan
NO MEXT Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)
NO Bulgarian Ministry of Education and Science, National RI Roadmap Project
NO Academy of Finland
NO CERCA programme of the Generalitat de Catalunya
NO Croatian Science Foundation (HrZZ)
NO University of Rijeka Project
NO DFG Collaborative Research Centres German Research Foundation (DFG)
NO Polish National Research Centre
NO Brazilian MCTIC
NO CNPq Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ)
NO FAPERJ Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio De Janeiro (FAPERJ)
NO Comisión Europea
DS Docta Complutense
RD 11 abr 2025