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. 2022 Apr;376(6588):77-80.
doi: 10.1126/science.abn0567. Epub 2022 Mar 10.

Time-resolved hadronic particle acceleration in the recurrent nova RS Ophiuchi

H.E.S.S. Collaboration*†F Aharonian  1   2   3 F Ait Benkhali  4 E O Angüner  5 H Ashkar  6 M Backes  7   8 V Baghmanyan  9 V Barbosa Martins  10 R Batzofin  11 Y Becherini  12   13 D Berge  10 K Bernlöhr  2 B Bi  14 M Böttcher  8 C Boisson  15 J Bolmont  16 M de Bony de Lavergne  17 M Breuhaus  2 R Brose  1 F Brun  18 S Caroff  16 S Casanova  9 M Cerruti  12 T Chand  8 A Chen  11 G Cotter  19 J Damascene Mbarubucyeye  10 A Djannati-Ataï  12 A Dmytriiev  15 V Doroshenko  14 C Duffy  19 K Egberts  20 J-P Ernenwein  5 S Fegan  6 K Feijen  21 A Fiasson  17 G Fichet de Clairfontaine  15 G Fontaine  6 M Füßling  10 S Funk  22 S Gabici  12 Y A Gallant  23 S Ghafourizadeh  4 G Giavitto  10 L Giunti  12   18 D Glawion  22 J F Glicenstein  18 M-H Grondin  24 G Hermann  2 J A Hinton  2 M Hörbe  19 W Hofmann  2 C Hoischen  20 T L Holch  10 M Holler  25 D Horns  26 Zhiqiu Huang  2 M Jamrozy  27 F Jankowsky  4 I Jung-Richardt  22 E Kasai  7 K Katarzyński  28 U Katz  22 D Khangulyan  29 B Khélifi  12 S Klepser  10 W Kluźniak  30 Nu Komin  11 R Konno  10 K Kosack  18 D Kostunin  10 S Le Stum  5 A Lemière  12 M Lemoine-Goumard  24 J-P Lenain  16 F Leuschner  14 T Lohse  31 A Luashvili  15 I Lypova  4 J Mackey  1 D Malyshev  14 D Malyshev  22 V Marandon  2 P Marchegiani  11 A Marcowith  23 G Martí-Devesa  25 R Marx  4 G Maurin  17 M Meyer  26 A Mitchell  2   22 R Moderski  30 L Mohrmann  2 A Montanari  18 E Moulin  18 J Muller  6 T Murach  10 K Nakashima  22 M de Naurois  6 A Nayerhoda  9 J Niemiec  9 A Priyana Noel  27 P O'Brien  32 S Ohm  10 L Olivera-Nieto  2 E de Ona Wilhelmi  10 M Ostrowski  27 S Panny  25 M Panter  2 R D Parsons  31 G Peron  2 S Pita  12 V Poireau  17 D A Prokhorov  33 H Prokoph  10 G Pühlhofer  14 M Punch  12   13 A Quirrenbach  4 P Reichherzer  18 A Reimer  25 O Reimer  25 M Renaud  23 B Reville  2 F Rieger  2 G Rowell  21 B Rudak  30 H Rueda Ricarte  18 E Ruiz-Velasco  2 V Sahakian  34 S Sailer  2 H Salzmann  14 D A Sanchez  17 A Santangelo  14 M Sasaki  22 J Schäfer  22 F Schüssler  18 H M Schutte  8 U Schwanke  31 M Senniappan  13 J N S Shapopi  7 R Simoni  33 A Sinha  23 H Sol  15 A Specovius  22 S Spencer  19 Ł Stawarz  27 S Steinmassl  2 C Steppa  20 T Takahashi  35 T Tanaka  36 A M Taylor  10 R Terrier  12 C Thorpe-Morgan  14 M Tsirou  2 N Tsuji  37 R Tuffs  2 Y Uchiyama  29 T Unbehaun  22 C van Eldik  22 B van Soelen  38 J Veh  22 C Venter  8 J Vink  33 S J Wagner  4 F Werner  2 R White  2 A Wierzcholska  9 Yu Wun Wong  22 A Yusafzai  22 M Zacharias  8   15 D Zargaryan  1   3 A A Zdziarski  30 A Zech  15 S J Zhu  10 S Zouari  12 N Żywucka  8
Affiliations

Time-resolved hadronic particle acceleration in the recurrent nova RS Ophiuchi

H.E.S.S. Collaboration*† et al. Science. 2022 Apr.

Abstract

Recurrent novae are repeating thermonuclear explosions in the outer layers of white dwarfs, due to the accretion of fresh material from a binary companion. The shock generated when ejected material slams into the companion star's wind can accelerate particles. We report very-high-energy (VHE; [Formula: see text]) gamma rays from the recurrent nova RS Ophiuchi, up to 1 month after its 2021 outburst, observed using the High Energy Stereoscopic System (H.E.S.S.). The temporal profile of VHE emission is similar to that of lower-energy giga-electron volt emission, indicating a common origin, with a 2-day delay in peak flux. These observations constrain models of time-dependent particle energization, favoring a hadronic emission scenario over the leptonic alternative. Shocks in dense winds provide favorable environments for efficient acceleration of cosmic rays to very high energies.

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  • In Science Journals.
    Vignieri S, Smith KT, Hurtley SM, Zahn LM, Gao W, Fogg CN, Lavine MS, Szuromi P, Stern P, Olingy C, Ferrarelli LK, Chemler SR. Vignieri S, et al. Science. 2022 Apr;376(6588):59-61. doi: 10.1126/science.abq2091. Epub 2022 Mar 31. Science. 2022. PMID: 35357916

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