Unveiling extended gamma-ray emission around HESS J1813-178

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, Fontaine G, Füßling M, Funk S, Gabici S, Gallant YA, Ghafourizadeh S, Giavitto G, Glawion D, Glicenstein JF, Goswami P, Grolleron G, Grondin MH, Hinton JA, Hofmann W, Holch TL, Holler M, Jamrozy M, Jankowsky F, Joshi V, Jung-Richardt I, Katarzyński K, Khatoon R, Khélifi B, Klepser S, Kluźniak W, Komin N, Kosack K, Kostunin D, Kundu A, Guedes Lang R, Le Stum S, Leitl F, Lemière A, Lemoine-Goumard M, Lenain JP, Leuschner F, MacKey J, Malyshev D, Malyshev D, Marandon V, Marinos P, Martí-Devesa G, Marx R, Mehta A, Mitchell A, Moderski R, Mohrmann L, Montanari A, Moulin E, Murach T, De Naurois M, Niemiec J, Priyana Noel A, O'Brien P, Ohm S, Olivera-Nieto L, De Ona Wilhelmi E, Ostrowski M, Panny S, Panter M, Parsons RD, Prokhorov DA, Pühlhofer G, Punch M, Quirrenbach A, Regeard M, Reichherzer P, Reimer A, Reimer O, Ren H, Renaud M, Reville B, Rieger F, Roellinghoff G, Rudak B, Sahakian V, Salzmann H, Sasaki M, Schüssler F, Schutte HM, Shapopi JN, Specovius A, Spencer S, Steenkamp R, Steinmassl S, Steppa C, Sushch I, Suzuki H, Takahashi T, Tanaka T, Terrier R, Tluczykont M, Tsuji N, Unbehaun T, van Eldik C, Vecchi M, Veh J, Venter C, Vink J, Wach T, Wagner SJ, Wierzcholska A, Zacharias M, Zargaryan D, Zdziarski AA, Zouari S, Żywucka N (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Book Volume: 686

Article Number: A149

DOI: 10.1051/0004-6361/202348374

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.

Authors with CRIS profile

Involved external institutions

Deutsches Elektronen-Synchrotron DESY Germany (DE) Université Paris Cité France (FR) Noordwes-Universiteit / North-West University South Africa (ZA) Sorbonne Université France (FR) University of Savoy Mont Blanc / Université Savoie Mont Blanc France (FR) Universität Hamburg (UHH) Germany (DE) University of Groningen / Rijksuniversiteit Groningen Netherlands (NL) Max-Planck-Institut für Kernphysik (MPIK) / Max Planck Institute for Nuclear Physics Germany (DE) Institut national de physique nucléaire et de physique des particules (IN2P3) France (FR) Jagiellonian University / Uniwersytet Jagielloński (UJ) Poland (PL) Ruprecht-Karls-Universität Heidelberg Germany (DE) Humboldt-Universität zu Berlin Germany (DE) Nicolaus Copernicus Astronomical Centre of the Polish Academy of Sciences Poland (PL) Nicolaus Copernicus University (NCU) / Uniwersytet Mikołaja Kopernika w Toruniu (UMK) Poland (PL) Leopold-Franzens-Universität Innsbruck / University of Innsbruck Austria (AT) University of Western Sydney Australia (AU) Dublin Institute for Advanced Studies (DIAS) Ireland (IE) Laboratoire Leprince-Ringuet (LLR) France (FR) University of Warsaw / Uniwersytet Warszawski Poland (PL) Institute of Nuclear Physics Polish Academy of Sciences / Instytut Fizyki Jądrowej im. Henryka Niewodniczańskiego Polskiej Akademii Nauk Poland (PL) Université Paris-Saclay France (FR) University of Tokyo Japan (JP) University of Montpellier / Université Montpellier France (FR) Université de Bordeaux France (FR) University of Amsterdam Netherlands (NL) Institute of Research into the Fundamental Laws of the Universe / Institut de recherche sur les lois fondamentales de l'univers (IRFU) France (FR) University of the Witwatersrand (WITS) South Africa (ZA) University of Oxford United Kingdom (GB) Eberhard Karls Universität Tübingen Germany (DE) University of Adelaide Australia (AU) Konan University / 甲南大学 Japan (JP) University of Namibia (UNAM) Namibia (NA) University of Leicester United Kingdom (GB) Laboratoire Univers et Théories (LUTH) / Laboratory of the Universe and Theories France (FR) University of the Free State South Africa (ZA) Yerevan Physics Institute (YerPhI) / Երևանի Ֆիզիկայի Ինստիտուտ Armenia (AM) Universität Potsdam Germany (DE) Riken Institute of Physical and Chemical Research / 理化学研究所 Japan (JP)

How to cite

APA:

Aharonian, F., Ait Benkhali, F., Aschersleben, J., Ashkar, H., Backes, M., Baktash, A.,... Żywucka, N. (2024). Unveiling extended gamma-ray emission around HESS J1813-178. Astronomy & Astrophysics, 686. https://doi.org/10.1051/0004-6361/202348374

MLA:

Aharonian, F., et al. "Unveiling extended gamma-ray emission around HESS J1813-178." Astronomy & Astrophysics 686 (2024).

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