Evidence of 100 TeV $\gamma$-ray emission from HESS J1702-420: A new PeVatron candidate

H. Abdalla; F. Aharonian; F. Ait Benkhali; E.O. Angüner; C. Arcaro; C. Armand; T. Armstrong; H. Ashkar; M. Backes; V. Baghmanyan; V. Barbosa Martins; A. Barnacka; M. Barnard; Y. Becherini; D. Berge; K. Bernlöhr; B. Bi; M. Böttcher; C. Boisson; J. Bolmont; M. de Bony de Lavergne; M. Breuhaus; F. Brun; P. Brun; M. Bryan; M. Büchele; T. Bulik; T. Bylund; S. Caroff; A. Carosi; S. Casanova; T. Chand; S. Chandra; A. Chen; G. Cotter; M. Curyło; J. Damascene Mbarubucyeye; I.D. Davids; J. Davies; C. Deil; J. Devin; L. Dirson; A. Djannati-Ataï; A. Dmytriiev; A. Donath; V. Doroshenko; L. Dreyer; C. Duffy; J. Dyks; K. Egberts; F. Eichhorn; S. Einecke; G. Emery; J.-P. Ernenwein; K. Feijen; S. Fegan; A. Fiasson; G. Fichet de Clairfontaine; G. Fontaine; S. Funk; M. Füssling; S. Gabici; Y.A. Gallant; G. Giavitto; L. Giunti; D. Glawion; J.F. Glicenstein; M.-H. Grondin; J. Hahn; M. Haupt; G. Hermann; J.A. Hinton; W. Hofmann; C. Hoischen; T.L. Holch; M. Holler; M. Hörbe; D. Horns; D. Huber; M. Jamrozy; D. Jankowsky; F. Jankowsky; A. Jardin-Blicq; V. Joshi; I. Jung-Richardt; E. Kasai; M.A. Kastendieck; K. Katarzyński; U. Katz; D. Khangulyan; B. Khélifi; S. Klepser; W. Kluźniak; Nu. Komin; R. Konno; K. Kosack; D. Kostunin; M. Kreter; G. Lamanna; A. Lemière; M. Lemoine-Goumard; J.-P. Lenain; F. Leuschner; C. Levy; T. Lohse; I. Lypova; J. Mackey; J. Majumdar; D. Malyshev; V. Marandon; P. Marchegiani; Alexandre Marcowith; A. Mares; G. Martí-Devesa; R. Marx; G. Maurin; P.J. Meintjes; M. Meyer; A. Mitchell; R. Moderski; L. Mohrmann; A. Montanari; C. Moore; P. Morris; E. Moulin; J. Muller; T. Murach; K. Nakashima; A. Nayerhoda; M. de Naurois; H. Ndiyavala; J. Niemiec; L. Oakes; P. O'Brien; H. Odaka; S. Ohm; L. Olivera-Nieto; E. de Ona Wilhelmi; M. Ostrowski; S. Panny; M. Panter; R.D. Parsons; G. Peron; B. Peyaud; Q. Piel; S. Pita; V. Poireau; A. Priyana Noel; D.A. Prokhorov; H. Prokoph; G. Pühlhofer; M. Punch; A. Quirrenbach; S. Raab; R. Rauth; P. Reichherzer; A. Reimer; O. Reimer; Q. Remy; Matthieu Renaud; F. Rieger; L. Rinchiuso; C. Romoli; G. Rowell; B. Rudak; E. Ruiz-Velasco; V. Sahakian; S. Sailer; H. Salzmann; D.A. Sanchez; A. Santangelo; M. Sasaki; M. Scalici; J. Schäfer; F. Schüssler; H.M. Schutte; U. Schwanke; M. Seglar-Arroyo; M. Senniappan; A.S. Seyffert; N. Shafi; J.N.S. Shapopi; K. Shiningayamwe; R. Simoni; A. Sinha; H. Sol; A. Specovius; S. Spencer; M. Spir-Jacob; L. Stawarz; L. Sun; R. Steenkamp; C. Stegmann; S. Steinmassl; C. Steppa; T. Takahashi; T. Tavernier; A.M. Taylor; R. Terrier; J.H.E. Thiersen; D. Tiziani; M. Tluczykont; L. Tomankova; C. Trichard; M. Tsirou; R. Tuffs; Y. Uchiyama; D.J. van Der Walt; C. van Eldik; C. van Rensburg; B. van Soelen; George Vasileiadis; J. Veh; C. Venter; P. Vincent; J. Vink; H.J. Völk; Z. Wadiasingh; S.J. Wagner; J. Watson; Felix Werner; R. White; A. Wierzcholska; Yu Wun Wong; A. Yusafzai; M. Zacharias; R. Zanin; D. Zargaryan; A.A. Zdziarski; A. Zech; S.J. Zhu; J. Zorn; S. Zouari; N. Żywucka; F. Acero

doi:10.1051/0004-6361/202140962

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$Evidence of 100 TeV $\gamma$-ray emission from HESS J1702-420: A new PeVatron candidate$

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Evidence of 100 TeV $\gamma$-ray emission from HESS J1702-420: A new PeVatron candidate

H. Abdalla, F. Aharonian, F. Ait Benkhali, E.O. Angüner, C. Arcaro, C. Armand, T. Armstrong, H. Ashkar, M. Backes, V. Baghmanyan, …

Astron.Astrophys, Vol.653

2021

DOI: https://doi.org/10.1051/0004-6361/202140962

Abstract

cosmic radiation: spectrum

energy: high

p: energy

cosmic radiation: UHE

gamma ray: energy spectrum

dimension: 3

HESS

TeV

GLAST

acceleration

curvature

spectral

solids

galaxy

site

5/3

GeV

The identification of PeVatrons, hadronic particle accelerators reaching the knee of the cosmic ray spectrum (few $10^{15}$ eV), is crucial to understand the origin of cosmic rays in the Galaxy. We provide an update on the unidentified source HESS J1702-420, a promising PeVatron candidate. We present new observations of HESS J1702-420 made with the High Energy Stereoscopic System (H.E.S.S.), and processed using improved analysis techniques. The analysis configuration was optimized to enhance the collection area at the highest energies. We applied a three-dimensional (3D) likelihood analysis to model the source region and adjust non thermal radiative spectral models to the $\gamma$-ray data. We also analyzed archival data from the Fermi Large Area Telescope (LAT) to constrain the source spectrum at $\gamma$-ray energies >10 GeV. We report the detection of a new source component called HESS J1702-420A, that was separated from the bulk of TeV emission at a $5.4\sigma$ confidence level. The power law $\gamma$-ray spectrum of HESS J1702-420A extends with an index of $\Gamma=1.53\pm0.19_\text{stat}\pm0.20_\text{sys}$ and without curvature up to the energy band 64-113 TeV, in which it was detected by H.E.S.S. at a $4.0\sigma$ confidence level. This brings evidence for the source emission up to $100\,\text{TeV}$, which makes HESS J1702-420A a compelling candidate site for the presence of extremely high energy cosmic rays. Remarkably, in a hadronic scenario, the cut-off energy of the proton distribution powering HESS J1702-420A is found to be higher than 0.5 PeV at a 95% confidence level. HESS J1702-420A becomes therefore one of the most solid PeVatron candidates detected so far in H.E.S.S. data, altough a leptonic origin of its emission could not be ruled out either.

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Title: Evidence of 100 TeV $\gamma$-ray emission from HESS J1702-420: A new PeVatron candidate
Creators - without role: H. Abdalla - University of Namibia
F. Aharonian - Max Planck Institute for Nuclear Physics
F. Ait Benkhali - Max Planck Institute for Nuclear Physics
E.O. Angüner - Centre National de la Recherche Scientifique
C. Arcaro - North-West University
C. Armand - Laboratoire d’Annecy de Physique des Particules
T. Armstrong - University of Oxford
H. Ashkar - Institut de Recherche sur les Lois Fondamentales de l'Univers
M. Backes - University of Namibia
V. Baghmanyan - Institute of Nuclear Physics, Polish Academy of Sciences
V. Barbosa Martins
A. Barnacka - Jagiellonian University
M. Barnard - North-West University
Y. Becherini - Linnaeus University
D. Berge
K. Bernlöhr - Max Planck Institute for Nuclear Physics
B. Bi - University of Tübingen
M. Böttcher - North-West University
C. Boisson - Laboratoire Univers et Théories
J. Bolmont - Laboratoire de Physique Nucléaire et de Hautes Énergies
M. de Bony de Lavergne - Centre National de la Recherche Scientifique
M. Breuhaus - Max Planck Institute for Nuclear Physics
F. Brun - Institut de Recherche sur les Lois Fondamentales de l'Univers
P. Brun - Université Paris-Saclay
M. Bryan - University of Amsterdam
M. Büchele - Friedrich-Alexander-Universität Erlangen-Nürnberg
T. Bulik - University of Warsaw
T. Bylund - Linnaeus University
S. Caroff - Université Grenoble Alpes
A. Carosi - Université Grenoble Alpes
S. Casanova - Max Planck Institute for Nuclear Physics
T. Chand - North-West University
S. Chandra - North-West University
A. Chen - University of the Witwatersrand
G. Cotter - University of Oxford
M. Curyło - University of Warsaw
J. Damascene Mbarubucyeye
I.D. Davids - University of Namibia
J. Davies - University of Oxford
C. Deil - Max Planck Institute for Nuclear Physics
J. Devin - Université Paris Cité
L. Dirson - Universität Hamburg
A. Djannati-Ataï - AstroParticule et Cosmologie
A. Dmytriiev - Université Paris Sciences et Lettres
A. Donath - Max Planck Institute for Nuclear Physics
V. Doroshenko - University of Tübingen
L. Dreyer - North-West University
C. Duffy - University of Leicester
J. Dyks - Polish Academy of Sciences
K. Egberts - University of Potsdam
F. Eichhorn - Friedrich-Alexander-Universität Erlangen-Nürnberg
S. Einecke - University of Adelaide
G. Emery - Laboratoire de Physique Nucléaire et de Hautes Énergies
J.-P. Ernenwein - Aix-Marseille Université
K. Feijen - University of Adelaide
S. Fegan - Laboratoire Leprince-Ringuet
A. Fiasson - Laboratoire d’Annecy de Physique des Particules
G. Fichet de Clairfontaine - Laboratoire Univers et Théories
G. Fontaine - Laboratoire Leprince-Ringuet
S. Funk - Friedrich-Alexander-Universität Erlangen-Nürnberg
M. Füssling
S. Gabici - Université Paris Cité
Y.A. Gallant - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
G. Giavitto
L. Giunti - Institut de Recherche sur les Lois Fondamentales de l'Univers
D. Glawion - Friedrich-Alexander-Universität Erlangen-Nürnberg
J.F. Glicenstein - CEA Paris-Saclay
M.-H. Grondin - Institut National de Physique Nucléaire et de Physique des Particules
J. Hahn - Max Planck Institute for Nuclear Physics
M. Haupt
G. Hermann - Max Planck Institute for Nuclear Physics
J.A. Hinton - Max Planck Institute for Nuclear Physics
W. Hofmann - Max Planck Institute for Nuclear Physics
C. Hoischen - University of Potsdam
T.L. Holch
M. Holler - Universität Innsbruck
M. Hörbe - University of Oxford
D. Horns - Universität Hamburg
D. Huber - Universität Innsbruck
M. Jamrozy - Jagiellonian University
D. Jankowsky - Friedrich-Alexander-Universität Erlangen-Nürnberg
F. Jankowsky - Heidelberg University
A. Jardin-Blicq - Max Planck Institute for Nuclear Physics
V. Joshi - Friedrich-Alexander-Universität Erlangen-Nürnberg
I. Jung-Richardt - Friedrich-Alexander-Universität Erlangen-Nürnberg
E. Kasai - University of Namibia
M.A. Kastendieck - Universität Hamburg
K. Katarzyński - Nicolaus Copernicus University
U. Katz - Friedrich-Alexander-Universität Erlangen-Nürnberg
D. Khangulyan - Rikkyo University
B. Khélifi - Laboratoire AstroParticule et Cosmologie
S. Klepser
W. Kluźniak - Nicolaus Copernicus Astronomical Center
Nu. Komin - University of the Witwatersrand
R. Konno
K. Kosack - Université Paris-Saclay
D. Kostunin
M. Kreter - North-West University
G. Lamanna - Centre National de la Recherche Scientifique
A. Lemière - Laboratoire AstroParticule et Cosmologie
M. Lemoine-Goumard - Institut National de Physique Nucléaire et de Physique des Particules
J.-P. Lenain - Sorbonne Université
F. Leuschner - University of Tübingen
C. Levy - Sorbonne Paris Cité
T. Lohse - Humboldt-Universität zu Berlin
I. Lypova
J. Mackey - Dublin Institute For Advanced Studies
J. Majumdar
D. Malyshev - University of Tübingen
V. Marandon - Max Planck Institute for Nuclear Physics
P. Marchegiani
Alexandre Marcowith - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
A. Mares - Centre National de la Recherche Scientifique
G. Martí-Devesa - Universität Innsbruck
R. Marx - Friedrich-Alexander-Universität Erlangen-Nürnberg
G. Maurin - Centre National de la Recherche Scientifique
P.J. Meintjes - University of the Free State
M. Meyer - Friedrich-Alexander-Universität Erlangen-Nürnberg
A. Mitchell - Max Planck Institute for Nuclear Physics
R. Moderski - Polish Academy of Sciences
L. Mohrmann - Friedrich-Alexander-Universität Erlangen-Nürnberg
A. Montanari - Institut de Recherche sur les Lois Fondamentales de l'Univers
C. Moore - University of Leicester
P. Morris - University of Oxford
E. Moulin - Université Paris-Saclay
J. Muller - École Polytechnique
T. Murach
K. Nakashima - Friedrich-Alexander-Universität Erlangen-Nürnberg
A. Nayerhoda - Institute of Nuclear Physics, Polish Academy of Sciences
M. de Naurois - École Polytechnique
H. Ndiyavala - North-West University
J. Niemiec - Institute of Nuclear Physics, Polish Academy of Sciences
L. Oakes - Humboldt-Universität zu Berlin
P. O'Brien
H. Odaka - The University of Tokyo
S. Ohm
L. Olivera-Nieto - Max Planck Institute for Nuclear Physics
E. de Ona Wilhelmi
M. Ostrowski - Jagiellonian University
S. Panny - Universität Innsbruck
M. Panter - Max Planck Institute for Nuclear Physics
R.D. Parsons - Humboldt-Universität zu Berlin
G. Peron - Max Planck Institute for Nuclear Physics
B. Peyaud - Université Paris-Saclay
Q. Piel - Laboratoire d’Annecy de Physique des Particules
S. Pita - Centre National de la Recherche Scientifique
V. Poireau - Laboratoire d’Annecy de Physique des Particules
A. Priyana Noel - Jagiellonian University
D.A. Prokhorov - University of Amsterdam
H. Prokoph
G. Pühlhofer - University of Tübingen
M. Punch - Linnaeus University
A. Quirrenbach - Heidelberg University
S. Raab - Friedrich-Alexander-Universität Erlangen-Nürnberg
R. Rauth - Universität Innsbruck
P. Reichherzer - Université Paris-Saclay
A. Reimer - Universität Innsbruck
O. Reimer - Universität Innsbruck
Q. Remy - Max Planck Institute for Nuclear Physics
Matthieu Renaud - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
F. Rieger - Max Planck Institute for Nuclear Physics
L. Rinchiuso - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
C. Romoli - Max Planck Institute for Nuclear Physics
G. Rowell - University of Adelaide
B. Rudak - Nicolaus Copernicus Astronomical Center
E. Ruiz-Velasco - Max Planck Institute for Nuclear Physics
V. Sahakian - A. Alikhanyan National Laboratory
S. Sailer - Max Planck Institute for Nuclear Physics
H. Salzmann - University of Tübingen
D.A. Sanchez - Laboratoire d’Annecy de Physique des Particules
A. Santangelo - University of Tübingen
M. Sasaki - Friedrich-Alexander-Universität Erlangen-Nürnberg
M. Scalici - University of Tübingen
J. Schäfer - Friedrich-Alexander-Universität Erlangen-Nürnberg
F. Schüssler - Institut de Recherches sur les lois Fondamentales de l'Univers
H.M. Schutte - North-West University
U. Schwanke - Humboldt-Universität zu Berlin
M. Seglar-Arroyo - CEA Paris-Saclay
M. Senniappan - Linnaeus University
A.S. Seyffert - North-West University
N. Shafi - University of the Witwatersrand
J.N.S. Shapopi - University of Namibia
K. Shiningayamwe - University of Namibia
R. Simoni - University of Amsterdam
A. Sinha - Université Paris Cité
H. Sol - Université Paris Cité
A. Specovius - Friedrich-Alexander-Universität Erlangen-Nürnberg
S. Spencer - University of Oxford
M. Spir-Jacob - Laboratoire AstroParticule et Cosmologie
L. Stawarz
L. Sun - University of Amsterdam
R. Steenkamp - University of Namibia
C. Stegmann - University of Potsdam
S. Steinmassl - Max Planck Institute for Nuclear Physics
C. Steppa - University of Potsdam
T. Takahashi - The University of Tokyo
T. Tavernier - Université Paris-Saclay
A.M. Taylor
R. Terrier - Centre National de la Recherche Scientifique
J.H.E. Thiersen - North-West University
D. Tiziani - Friedrich-Alexander-Universität Erlangen-Nürnberg
M. Tluczykont - Universität Hamburg
L. Tomankova - Friedrich-Alexander-Universität Erlangen-Nürnberg
C. Trichard - École Polytechnique
M. Tsirou - Max Planck Institute for Nuclear Physics
R. Tuffs - Max Planck Institute for Nuclear Physics
Y. Uchiyama - Rikkyo University
D.J. van Der Walt - North-West University
C. van Eldik - Friedrich-Alexander-Universität Erlangen-Nürnberg
C. van Rensburg - University of Namibia
B. van Soelen - University of the Free State
George Vasileiadis - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
J. Veh - Friedrich-Alexander-Universität Erlangen-Nürnberg
C. Venter - North-West University
P. Vincent - Centre National de la Recherche Scientifique
J. Vink - University of Amsterdam
H.J. Völk - Max Planck Institute for Nuclear Physics
Z. Wadiasingh - North-West University
S.J. Wagner - Heidelberg University
J. Watson - University of Oxford
Felix Werner - Max Planck Institute for Nuclear Physics
R. White - Max Planck Institute for Nuclear Physics
A. Wierzcholska - Institute of Nuclear Physics, Polish Academy of Sciences
Yu Wun Wong - Friedrich-Alexander-Universität Erlangen-Nürnberg
A. Yusafzai - Friedrich-Alexander-Universität Erlangen-Nürnberg
M. Zacharias - North-West University
R. Zanin - Max Planck Institute for Nuclear Physics
D. Zargaryan - Dublin Institute For Advanced Studies
A.A. Zdziarski - Polish Academy of Sciences
A. Zech - Université Paris Cité
S.J. Zhu
J. Zorn - Max Planck Institute for Nuclear Physics
S. Zouari - Laboratoire AstroParticule et Cosmologie
N. Żywucka - North-West University
F. Acero - Université Paris-Saclay
Publication Details: Astron.Astrophys, Vol.653
Identifiers: 9940432009311
Academic Unit: Laboratoire Univers et Particules de Montpellier - LUPM
Language: English
Resource Type: Journal article
Local Fields: hal-03263207