Unveiling extended gamma-ray emission around HESS J1813-178

H.E.S.S. Collaboration; F. Aharonian; F. Ait Benkhali; J. Aschersleben; H. Ashkar; M. Backes; A. Baktash; V. Barbosa Martins; J. Barnard; R. Batzofin; Y. Becherini; D. Berge; K. Bernlöhr; B. Bi; M. Böttcher; C. Boisson; J. Bolmont; M. De Bony De Lavergne; J. Borowska; M. Bouyahiaoui; M. Breuhaus; R. Brose; F. Brun; B. Bruno; T. Bulik; C. Burger-Scheidlin; S. Caroff; S. Casanova; R. Cecil; J. Celic; M. Cerruti; P. Chambery; T. Chand; A. Chen; J. Chibueze; O. Chibueze; G. Cotter; J. Damascene Mbarubucyeye; A. Djannati-Ataï; A. Dmytriiev; V. Doroshenko; S. Einecke; J. P. Ernenwein; K. Feijen; M. Filipovic; A. Mehta; H. Ren; H. M. Schutte; T. Tanaka; M. Vecchi; J. Vink

doi:10.1051/0004-6361/202348374

Unveiling extended gamma-ray emission around HESS J1813-178

H.E.S.S. Collaboration, F. Aharonian, F. Ait Benkhali, J. Aschersleben, H. Ashkar, M. Backes, A. Baktash, V. Barbosa Martins, J. Barnard, R. Batzofin, Y. Becherini, D. Berge, K. Bernlöhr, B. Bi, M. Böttcher, C. Boisson, J. Bolmont, M. De Bony De Lavergne, J. Borowska, M. BouyahiaouiM. Breuhaus, R. Brose, F. Brun, B. Bruno, T. Bulik, C. Burger-Scheidlin, S. Caroff, S. Casanova, R. Cecil, J. Celic, M. Cerruti, P. Chambery^*, T. Chand, A. Chen, J. Chibueze, O. Chibueze, G. Cotter, J. Damascene Mbarubucyeye, A. Djannati-Ataï, A. Dmytriiev, V. Doroshenko, S. Einecke, J. P. Ernenwein, K. Feijen, M. Filipovic, A. Mehta, H. Ren, H. M. Schutte, T. Tanaka, M. Vecchi, J. Vink

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Abstract

Context. HESS J1813-178 is a very-high-energy γ-ray source spatially coincident with the young and energetic pulsar PSR J1813-1749 and thought to be associated with its pulsar wind nebula (PWN). Recently, evidence for extended high-energy emission in the vicinity of the pulsar has been revealed in the Fermi Large Area Telescope (LAT) data. This motivates revisiting the HESS J1813-178 region, taking advantage of improved analysis methods and an extended dataset. Aims. Using data taken by the High Energy Stereoscopic System (H.E.S.S.) experiment and the Fermi-LAT, we aim to describe the γ-ray emission in the region with a consistent model, to provide insights into its origin. Methods. We performed a likelihood-based analysis on 32 hours of H.E.S.S. data and 12 yr of Fermi-LAT data and we fitted a spectro-morphological model to the combined datasets. These results allowed us to develop a physical model for the origin of the observed γ-ray emission in the region. Results. In addition to the compact very-high-energy γ-ray emission centred on the pulsar, we find a significant yet previously undetected component along the Galactic plane. With Fermi-LAT data, we confirm extended high-energy emission consistent with the position and elongation of the extended emission observed with H.E.S.S. These results establish a consistent description of the emission in the region from GeV energies to several tens of TeV. Conclusions. This study suggests that HESS J1813-178 is associated with a γ-ray PWN powered by PSR J1813-1749. A possible origin of the extended emission component is inverse Compton emission from electrons and positrons that have escaped the confines of the pulsar and form a halo around the PWN.

Original language	English
Article number	A149
Number of pages	17
Journal	Astronomy and Astrophysics
Volume	686
DOIs	https://doi.org/10.1051/0004-6361/202348374
Publication status	Published - 1-Jun-2024

Keywords

Gamma rays: general
Gamma rays: ISM
Pulsars: individual: PSR J1813-1749

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H.E.S.S. Collaboration, Aharonian, F., Ait Benkhali, F., Aschersleben, J., Ashkar, H., Backes, M., Baktash, A., Barbosa Martins, V., Barnard, J., Batzofin, R., Becherini, Y., Berge, D., Bernlöhr, K., Bi, B., Böttcher, M., Boisson, C., Bolmont, J., De Bony De Lavergne, M., Borowska, J., ... Vink, J. (2024). Unveiling extended gamma-ray emission around HESS J1813-178. Astronomy and Astrophysics, 686, Article A149. https://doi.org/10.1051/0004-6361/202348374

@article{4d8c86db86714c488fb93898bdf180be,

title = "Unveiling extended gamma-ray emission around HESS J1813-178",

abstract = "Context. HESS J1813-178 is a very-high-energy γ-ray source spatially coincident with the young and energetic pulsar PSR J1813-1749 and thought to be associated with its pulsar wind nebula (PWN). Recently, evidence for extended high-energy emission in the vicinity of the pulsar has been revealed in the Fermi Large Area Telescope (LAT) data. This motivates revisiting the HESS J1813-178 region, taking advantage of improved analysis methods and an extended dataset. Aims. Using data taken by the High Energy Stereoscopic System (H.E.S.S.) experiment and the Fermi-LAT, we aim to describe the γ-ray emission in the region with a consistent model, to provide insights into its origin. Methods. We performed a likelihood-based analysis on 32 hours of H.E.S.S. data and 12 yr of Fermi-LAT data and we fitted a spectro-morphological model to the combined datasets. These results allowed us to develop a physical model for the origin of the observed γ-ray emission in the region. Results. In addition to the compact very-high-energy γ-ray emission centred on the pulsar, we find a significant yet previously undetected component along the Galactic plane. With Fermi-LAT data, we confirm extended high-energy emission consistent with the position and elongation of the extended emission observed with H.E.S.S. These results establish a consistent description of the emission in the region from GeV energies to several tens of TeV. Conclusions. This study suggests that HESS J1813-178 is associated with a γ-ray PWN powered by PSR J1813-1749. A possible origin of the extended emission component is inverse Compton emission from electrons and positrons that have escaped the confines of the pulsar and form a halo around the PWN.",

keywords = "Gamma rays: general, Gamma rays: ISM, Pulsars: individual: PSR J1813-1749",

author = "{H.E.S.S. Collaboration} and F. Aharonian and {Ait Benkhali}, F. and J. Aschersleben and H. Ashkar and M. Backes and A. Baktash and {Barbosa Martins}, V. and J. Barnard and R. Batzofin and Y. Becherini and D. Berge and K. Bernl{\"o}hr and B. Bi and M. B{\"o}ttcher and C. Boisson and J. Bolmont and {De Bony De Lavergne}, M. and J. Borowska and M. Bouyahiaoui and M. Breuhaus and R. Brose and F. Brun and B. Bruno and T. Bulik and C. Burger-Scheidlin and S. Caroff and S. Casanova and R. Cecil and J. Celic and M. Cerruti and P. Chambery and T. Chand and A. Chen and J. Chibueze and O. Chibueze and G. Cotter and {Damascene Mbarubucyeye}, J. and A. Djannati-Ata{\"i} and A. Dmytriiev and V. Doroshenko and S. Einecke and Ernenwein, {J. P.} and K. Feijen and M. Filipovic and A. Mehta and H. Ren and Schutte, {H. M.} and T. Tanaka and M. Vecchi and J. Vink",

note = "Publisher Copyright: {\textcopyright} 2024 The Authors.",

year = "2024",

month = jun,

day = "1",

doi = "10.1051/0004-6361/202348374",

language = "English",

volume = "686",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = " EDP Sciences",

}

H.E.S.S. Collaboration, Aharonian, F, Ait Benkhali, F, Aschersleben, J, Ashkar, H, Backes, M, Baktash, A, Barbosa Martins, V, Barnard, J, Batzofin, R, Becherini, Y, Berge, D, Bernlöhr, K, Bi, B, Böttcher, M, Boisson, C, Bolmont, J, De Bony De Lavergne, M, Borowska, J, Bouyahiaoui, M, Breuhaus, M, Brose, R, Brun, F, Bruno, B, Bulik, T, Burger-Scheidlin, C, Caroff, S, Casanova, S, Cecil, R, Celic, J, Cerruti, M, Chambery, P, Chand, T, Chen, A, Chibueze, J, Chibueze, O, Cotter, G, Damascene Mbarubucyeye, J, Djannati-Ataï, A, Dmytriiev, A, Doroshenko, V, Einecke, S, Ernenwein, JP, Feijen, K, Filipovic, M, Mehta, A, Ren, H, Schutte, HM, Tanaka, T, Vecchi, M & Vink, J 2024, 'Unveiling extended gamma-ray emission around HESS J1813-178', Astronomy and Astrophysics, vol. 686, A149. https://doi.org/10.1051/0004-6361/202348374

TY - JOUR

T1 - Unveiling extended gamma-ray emission around HESS J1813-178

AU - H.E.S.S. Collaboration

AU - Aharonian, F.

AU - Ait Benkhali, F.

AU - Aschersleben, J.

AU - Ashkar, H.

AU - Backes, M.

AU - Baktash, A.

AU - Barbosa Martins, V.

AU - Barnard, J.

AU - Batzofin, R.

AU - Becherini, Y.

AU - Berge, D.

AU - Bernlöhr, K.

AU - Bi, B.

AU - Böttcher, M.

AU - Boisson, C.

AU - Bolmont, J.

AU - De Bony De Lavergne, M.

AU - Borowska, J.

AU - Bouyahiaoui, M.

AU - Breuhaus, M.

AU - Brose, R.

AU - Brun, F.

AU - Bruno, B.

AU - Bulik, T.

AU - Burger-Scheidlin, C.

AU - Caroff, S.

AU - Casanova, S.

AU - Cecil, R.

AU - Celic, J.

AU - Cerruti, M.

AU - Chambery, P.

AU - Chand, T.

AU - Chen, A.

AU - Chibueze, J.

AU - Chibueze, O.

AU - Cotter, G.

AU - Damascene Mbarubucyeye, J.

AU - Djannati-Ataï, A.

AU - Dmytriiev, A.

AU - Doroshenko, V.

AU - Einecke, S.

AU - Ernenwein, J. P.

AU - Feijen, K.

AU - Filipovic, M.

AU - Mehta, A.

AU - Ren, H.

AU - Schutte, H. M.

AU - Tanaka, T.

AU - Vecchi, M.

AU - Vink, J.

PY - 2024/6/1

Y1 - 2024/6/1

N2 - Context. HESS J1813-178 is a very-high-energy γ-ray source spatially coincident with the young and energetic pulsar PSR J1813-1749 and thought to be associated with its pulsar wind nebula (PWN). Recently, evidence for extended high-energy emission in the vicinity of the pulsar has been revealed in the Fermi Large Area Telescope (LAT) data. This motivates revisiting the HESS J1813-178 region, taking advantage of improved analysis methods and an extended dataset. Aims. Using data taken by the High Energy Stereoscopic System (H.E.S.S.) experiment and the Fermi-LAT, we aim to describe the γ-ray emission in the region with a consistent model, to provide insights into its origin. Methods. We performed a likelihood-based analysis on 32 hours of H.E.S.S. data and 12 yr of Fermi-LAT data and we fitted a spectro-morphological model to the combined datasets. These results allowed us to develop a physical model for the origin of the observed γ-ray emission in the region. Results. In addition to the compact very-high-energy γ-ray emission centred on the pulsar, we find a significant yet previously undetected component along the Galactic plane. With Fermi-LAT data, we confirm extended high-energy emission consistent with the position and elongation of the extended emission observed with H.E.S.S. These results establish a consistent description of the emission in the region from GeV energies to several tens of TeV. Conclusions. This study suggests that HESS J1813-178 is associated with a γ-ray PWN powered by PSR J1813-1749. A possible origin of the extended emission component is inverse Compton emission from electrons and positrons that have escaped the confines of the pulsar and form a halo around the PWN.

AB - Context. HESS J1813-178 is a very-high-energy γ-ray source spatially coincident with the young and energetic pulsar PSR J1813-1749 and thought to be associated with its pulsar wind nebula (PWN). Recently, evidence for extended high-energy emission in the vicinity of the pulsar has been revealed in the Fermi Large Area Telescope (LAT) data. This motivates revisiting the HESS J1813-178 region, taking advantage of improved analysis methods and an extended dataset. Aims. Using data taken by the High Energy Stereoscopic System (H.E.S.S.) experiment and the Fermi-LAT, we aim to describe the γ-ray emission in the region with a consistent model, to provide insights into its origin. Methods. We performed a likelihood-based analysis on 32 hours of H.E.S.S. data and 12 yr of Fermi-LAT data and we fitted a spectro-morphological model to the combined datasets. These results allowed us to develop a physical model for the origin of the observed γ-ray emission in the region. Results. In addition to the compact very-high-energy γ-ray emission centred on the pulsar, we find a significant yet previously undetected component along the Galactic plane. With Fermi-LAT data, we confirm extended high-energy emission consistent with the position and elongation of the extended emission observed with H.E.S.S. These results establish a consistent description of the emission in the region from GeV energies to several tens of TeV. Conclusions. This study suggests that HESS J1813-178 is associated with a γ-ray PWN powered by PSR J1813-1749. A possible origin of the extended emission component is inverse Compton emission from electrons and positrons that have escaped the confines of the pulsar and form a halo around the PWN.

KW - Gamma rays: general

KW - Gamma rays: ISM

KW - Pulsars: individual: PSR J1813-1749

UR - http://www.scopus.com/inward/record.url?scp=85195817727&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/202348374

DO - 10.1051/0004-6361/202348374

M3 - Article

AN - SCOPUS:85195817727

SN - 0004-6361

VL - 686

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A149

ER -

Unveiling extended gamma-ray emission around HESS J1813-178

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