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Journal Articles Astronomy and Astrophysics - A&A Year : 2020

An extreme particle accelerator in the Galactic plane: HESS J1826−130

H. Abdalla , R. Adam (1) , F. Aharonian , F. Ait Benkhali , E.O. Angüner (2) , C. Arcaro , C. Armand (3) , 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 (4) , J. Bolmont (1) , M. de Bony de Lavergne (3) , P. Bordas , M. Breuhaus , F. Brun , P. Brun , M. Bryan , M. Büchele , T. Bulik , T. Bylund , S. Caroff (1) , A. Carosi (3) , S. Casanova , T. Chand , S. Chandra , A. Chen , G. Cotter , M. Curyło , J. Damascene Mbarubucyeye , I. Davids , J. Davies , C. Deil , J. Devin (5) , P. Dewilt , L. Dirson , A. Djannati-Ataï (6) , A. Dmytriiev (4) , A. Donath , V. Doroshenko , C. Duffy , J. Dyks , K. Egberts , F. Eichhorn , S. Einecke , G. Emery (1) , J.-P. Ernenwein (2) , K. Feijen , S. Fegan (1) , A. Fiasson (3) , G. Fichet de Clairfontaine (4) , G. Fontaine (1) , S. Funk , M. Füssling , S. Gabici (6) , Y. Gallant (7) , G. Giavitto , L. Giunti , D. Glawion , J. Glicenstein , D. Gottschall , M.-H. Grondin (5) , J. Hahn , M. Haupt , G. Hermann , J. Hinton , W. Hofmann , C. Hoischen , T. 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. Kastendieck , K. Katarzyński , U. Katz , D. Khangulyan , B. Khélifi (6) , S. Klepser , W. Kluźniak , Nu. Komin , R. Konno , K. Kosack , D. Kostunin , M. Kreter , G. Lamanna (3) , A. Lemière (6) , M. Lemoine-Goumard (5) , J.-P. Lenain (1) , C. Levy (1) , T. Lohse , I. Lypova , J. Mackey , J. Majumdar , D. Malyshev , V. Marandon , ¶. Marchegiani , Alexandre Marcowith (7) , A. Mares (5) , G. Martí-Devesa , R. Marx , G. Maurin (3) , P. Meintjes , M. Meyer , A. Mitchell , R. Moderski , M. Mohamed , L. Mohrmann , A. Montanari , C. Moore , P. Morris , E. Moulin , J. Muller (1) , T. Murach , K. Nakashima , A. Nayerhoda , M. de Naurois (1) , H. Ndiyavala , F. Niederwanger , J. Niemiec , L. Oakes , P. O’brien , H. Odaka , S. Ohm , L. Olivera-Nieto , E. de Ona Wilhelmi , M. Ostrowski , I. Oya , M. Panter , S. Panny , R. Parsons , G. Peron , B. Peyaud , Q. Piel (3) , S. Pita (6) , V. Poireau (3) , A. Priyana Noel , D. Prokhorov , H. Prokoph , G. Pühlhofer , M. Punch (6) , A. Quirrenbach , S. Raab , R. Rauth , P. Reichherzer , A. Reimer , O. Reimer , Q. Remy , Matthieu Renaud (7) , F. Rieger , L. Rinchiuso , C. Romoli , G. Rowell , B. Rudak , E. Ruiz-Velasco , V. Sahakian , S. Sailer , D. Sanchez (3) , A. Santangelo , M. Sasaki , M. Scalici , F. Schüssler , H. Schutte , U. Schwanke , S. Schwemmer , M. Seglar-Arroyo , M. Senniappan , A. Seyffert , N. Shafi , K. Shiningayamwe , R. Simoni , A. Sinha (6) , H. Sol (4) , A. Specovius , S. Spencer , M. Spir-Jacob (6) , Ł. Stawarz , L. Sun , R. Steenkamp , C. Stegmann , S. Steinmassl , C. Steppa , T. Takahashi , T. Tavernier , A. Taylor , R. Terrier (6) , D. Tiziani , M. Tluczykont , L. Tomankova , C. Trichard (1) , M. Tsirou (7) , R. Tuffs , Y. Uchiyama , D. van Der Walt , C. van Eldik , C. van Rensburg , B. van Soelen , George Vasileiadis (7) , J. Veh , C. Venter , P. Vincent (1) , J. Vink , H. Völk , T. Vuillaume (3) , Z. Wadiasingh , S. Wagner , J. Watson , F. Werner , R. White , A. Wierzcholska , Yu Wun Wong , A. Yusafzai , M. Zacharias (4) , R. Zanin , D. Zargaryan , A. Zdziarski , A. Zech (4) , S. Zhu , A. Ziegler , J. Zorn , S. Zouari (6) , N. Żywucka
H. Abdalla
  • Function : Author
F. Aharonian
F. Ait Benkhali
  • Function : Author
C. Arcaro
T. Armstrong
H. Ashkar
M. Backes
V. Baghmanyan
V. Barbosa Martins
A. Barnacka
  • Function : Author
M. Barnard
Y. Becherini
D. Berge
K. Bernlöhr
B. Bi
  • Function : Author
M. Böttcher
C. Boisson
P. Bordas
  • Function : Author
M. Breuhaus
F. Brun
P. Brun
M. Bryan
  • Function : Author
M. Büchele
  • Function : Author
T. Bulik
  • Function : Author
T. Bylund
S. Casanova
T. Chand
S. Chandra
A. Chen
  • Function : Author
G. Cotter
M. Curyło
  • Function : Author
J. Damascene Mbarubucyeye
I. Davids
J. Davies
C. Deil
  • Function : Author
P. Dewilt
  • Function : Author
L. Dirson
  • Function : Author
A. Donath
V. Doroshenko
C. Duffy
  • Function : Author
J. Dyks
  • Function : Author
K. Egberts
  • Function : Author
F. Eichhorn
  • Function : Author
S. Einecke
K. Feijen
  • Function : Author
S. Funk
  • Function : Author
M. Füssling
  • Function : Author
G. Giavitto
L. Giunti
  • Function : Author
D. Glawion
J. Glicenstein
D. Gottschall
  • Function : Author
M.-H. Grondin
J. Hahn
  • Function : Author
M. Haupt
  • Function : Author
G. Hermann
  • Function : Author
J. Hinton
W. Hofmann
  • Function : Author
C. Hoischen
T. Holch
M. Holler
  • Function : Author
M. Hörbe
  • Function : Author
D. Horns
D. Huber
  • Function : Author
M. Jamrozy
D. Jankowsky
  • Function : Author
F. Jankowsky
  • Function : Author
A. Jardin-Blicq
V. Joshi
I. Jung-Richardt
  • Function : Author
E. Kasai
  • Function : Author
M. Kastendieck
  • Function : Author
K. Katarzyński
  • Function : Author
U. Katz
D. Khangulyan
B. Khélifi
S. Klepser
W. Kluźniak
  • Function : Author
Nu. Komin
R. Konno
K. Kosack
D. Kostunin
M. Kreter
T. Lohse
I. Lypova
  • Function : Author
J. Mackey
J. Majumdar
  • Function : Author
D. Malyshev
V. Marandon
¶. Marchegiani
  • Function : Author
G. Martí-Devesa
R. Marx
P. Meintjes
  • Function : Author
M. Meyer
  • Function : Author
A. Mitchell
R. Moderski
  • Function : Author
M. Mohamed
  • Function : Author
L. Mohrmann
A. Montanari
C. Moore
P. Morris
E. Moulin
T. Murach
K. Nakashima
  • Function : Author
A. Nayerhoda
H. Ndiyavala
F. Niederwanger
  • Function : Author
J. Niemiec
L. Oakes
  • Function : Author
P. O’brien
  • Function : Author
H. Odaka
  • Function : Author
S. Ohm
L. Olivera-Nieto
E. de Ona Wilhelmi
  • Function : Author
M. Ostrowski
I. Oya
  • Function : Author
M. Panter
  • Function : Author
S. Panny
R. Parsons
G. Peron
B. Peyaud
  • Function : Author
A. Priyana Noel
  • Function : Author
D. Prokhorov
  • Function : Author
H. Prokoph
  • Function : Author
G. Pühlhofer
  • Function : Author
M. Punch
A. Quirrenbach
  • Function : Author
S. Raab
  • Function : Author
R. Rauth
P. Reichherzer
  • Function : Author
A. Reimer
O. Reimer
  • Function : Author
Q. Remy
  • Function : Author
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
E. Ruiz-Velasco
V. Sahakian
  • Function : Author
S. Sailer
A. Santangelo
M. Sasaki
M. Scalici
  • Function : Author
F. Schüssler
H. Schutte
U. Schwanke
S. Schwemmer
  • Function : Author
M. Seglar-Arroyo
M. Senniappan
A. Seyffert
  • Function : Author
N. Shafi
  • Function : Author
K. Shiningayamwe
  • Function : Author
R. Simoni
  • Function : Author
A. Specovius
  • Function : Author
S. Spencer
Ł. Stawarz
  • Function : Author
L. Sun
  • Function : Author
R. Steenkamp
  • Function : Author
C. Stegmann
  • Function : Author
S. Steinmassl
C. Steppa
T. Takahashi
  • Function : Author
T. Tavernier
  • Function : Author
A. Taylor
D. Tiziani
  • Function : Author
M. Tluczykont
  • Function : Author
L. Tomankova
  • Function : Author
R. Tuffs
  • Function : Author
Y. Uchiyama
  • Function : Author
D. van Der Walt
  • Function : Author
C. van Eldik
C. van Rensburg
  • Function : Author
B. van Soelen
J. Veh
  • Function : Author
C. Venter
J. Vink
H. Völk
Z. Wadiasingh
S. Wagner
J. Watson
F. Werner
R. White
  • Function : Author
A. Wierzcholska
Yu Wun Wong
  • Function : Author
A. Yusafzai
  • Function : Author
M. Zacharias
R. Zanin
D. Zargaryan
A. Zdziarski
A. Zech
S. Zhu
A. Ziegler
  • Function : Author
J. Zorn
S. Zouari
N. Żywucka

Abstract

The unidentified very-high-energy (VHE; E > 0.1 TeV) γ -ray source, HESS J1826−130, was discovered with the High Energy Stereoscopic System (HESS) in the Galactic plane. The analysis of 215 h of HESS data has revealed a steady γ -ray flux from HESS J1826−130, which appears extended with a half-width of 0.21° ± 0.02 stat ° ± 0.05 sys °. The source spectrum is best fit with either a power-law function with a spectral index Γ = 1.78 ± 0.10 stat ± 0.20 sys and an exponential cut-off at 15.2 −3.2 +5.5 TeV, or a broken power-law with Γ 1 = 1.96 ± 0.06 stat ± 0.20 sys , Γ 2 = 3.59 ± 0.69 stat ± 0.20 sys for energies below and above E br = 11.2 ± 2.7 TeV, respectively. The VHE flux from HESS J1826−130 is contaminated by the extended emission of the bright, nearby pulsar wind nebula, HESS J1825−137, particularly at the low end of the energy spectrum. Leptonic scenarios for the origin of HESS J1826−130 VHE emission related to PSR J1826−1256 are confronted by our spectral and morphological analysis. In a hadronic framework, taking into account the properties of dense gas regions surrounding HESS J1826−130, the source spectrum would imply an astrophysical object capable of accelerating the parent particle population up to ≳200 TeV. Our results are also discussed in a multiwavelength context, accounting for both the presence of nearby supernova remnants, molecular clouds, and counterparts detected in radio, X-rays, and TeV energies.
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Dates and versions

hal-03371639 , version 1 (08-10-2021)

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H. Abdalla, R. Adam, F. Aharonian, F. Ait Benkhali, E.O. Angüner, et al.. An extreme particle accelerator in the Galactic plane: HESS J1826−130. Astronomy and Astrophysics - A&A, 2020, 644, pp.A112. ⟨10.1051/0004-6361/202038851⟩. ⟨hal-03371639⟩
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