학술논문
Unveiling extended gamma-ray emission around HESS J1813-178
Document Type
Working Paper
Author
Aharonian, F.; Benkhali, F. Ait; Aschersleben, J.; Ashkar, H.; Backes, M.; Baktash, A.; Martins, V. Barbosa; Barnard, J.; Batzofin, R.; Becherini, Y.; Berge, D.; Bernlöhr, K.; Bi, B.; Böttcher, M.; Boisson, C.; Bolmont, J.; de Lavergne, M. de Bony; 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.; Mbarubucyeye, J. Damascene; Djannati-Ataï, A.; Dmytriiev, A.; Doroshenko, V.; Einecke, S.; Ernenwein, J. -P.; Feijen, K.; Filipovic, M.; Fontaine, G.; Füßling, M.; Funk, S.; Gabici, S.; Gallant, Y. A.; Ghafourizadeh, S.; Giavitt, G.; Glawion, D.; Glicenstein, J. F.; Goswami, P.; Grolleron, G.; Grondin, M. -H.; Hinton, J. A.; Hofmann, W.; Holch, T. L.; Holler, M.; Jamrozy, M.; Jankowsky, F.; Joshi, V.; Jung-Richardt, I.; Katarzyński, K.; Khatoon, R.; Khélifi, B.; Klepser, S.; Kluźniak, W.; Komin, Nu.; Kosack, K.; Kostunin, D.; Kundu, A.; Lang, R. G.; Stum, S. Le; Leitl, F.; Lemière, A.; Lemoine-Goumard, M.; Lenain, J. -P.; Leuschner, F.; Mackey, J.; 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.; Noel, A. Priyana; O'Brien, P.; Ohm, S.; Olivera-Nieto, L.; Wilhelmi, E. de Ona; Ostrowski, M.; Panny, S.; Panter, M.; Parsons, R. D.; Prokhorov, D. A.; 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, H. M.; Shapopi, J. N. S.; 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, S. J.; Wierzcholska, A.; Zacharias, M.; Zargaryan, D.; Zdziarski, A. A.; Zouari, S.; Żywucka, N.
Source
A&A 686, A149 (2024)
Subject
Language
Abstract
HESS J1813$-$178 is a very-high-energy $\gamma$-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 data set. Using data taken by the High Energy Stereoscopic System (H.E.S.S.) experiment and the Fermi-LAT, we aim to describe the $\gamma$-ray emission in the region with a consistent model, to provide insights into its origin. We performed a likelihood-based analysis on 32 hours of H.E.S.S. data and 12 years of Fermi-LAT data and fit a spectro-morphological model to the combined datasets. These results allowed us to develop a physical model for the origin of the observed $\gamma$-ray emission in the region. In addition to the compact very-high-energy $\gamma$-ray emission centered 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. This study suggests that HESS J1813$-$178 is associated with a $\gamma$-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.
Comment: 13+5 pages, 13+11 figures. Accepted for publication in A&A. Corresponding authors: T.Wach, A.Mitchell, V.Joshi, P.Chamb\'ery
Comment: 13+5 pages, 13+11 figures. Accepted for publication in A&A. Corresponding authors: T.Wach, A.Mitchell, V.Joshi, P.Chamb\'ery