University of Oulu

MAGIC Collaboration, V A Acciari, S Ansoldi, L A Antonelli, A Arbet Engels, K Asano, D Baack, A Babić, B Banerjee, A Baquero, U Barres de Almeida, J A Barrio, J Becerra González, W Bednarek, L Bellizzi, E Bernardini, M Bernardos, A Berti, J Besenrieder, W Bhattacharyya, C Bigongiari, A Biland, O Blanch, G Bonnoli, Ž Bošnjak, G Busetto, R Carosi, G Ceribella, M Cerruti, Y Chai, A Chilingarian, S Cikota, S M Colak, E Colombo, J L Contreras, J Cortina, S Covino, G D’Amico, V D’Elia, P Da Vela, F Dazzi, A De Angelis, B De Lotto, M Delfino, J Delgado, C Delgado Mendez, D Depaoli, T Di Girolamo, F Di Pierro, L Di Venere, E Do Souto Espiñeira, D Dominis Prester, A Donini, D Dorner, M Doro, D Elsaesser, V Fallah Ramazani, A Fattorini, G Ferrara, L Foffano, M V Fonseca, L Font, C Fruck, S Fukami, R J García López, M Garczarczyk, S Gasparyan, M Gaug, N Giglietto, F Giordano, P Gliwny, N Godinović, D Green, D Hadasch, A Hahn, L Heckmann, J Herrera, J Hoang, D Hrupec, M Hütten, T Inada, S Inoue, K Ishio, Y Iwamura, L Jouvin, Y Kajiwara, M Karjalainen, D Kerszberg, Y Kobayashi, H Kubo, J Kushida, A Lamastra, D Lelas, F Leone, E Lindfors, S Lombardi, F Longo, M López, R López-Coto, A López-Oramas, S Loporchio, B Machado de Oliveira Fraga, C Maggio, P Majumdar, M Makariev, M Mallamaci, G Maneva, M Manganaro, K Mannheim, L Maraschi, M Mariotti, M Martínez, D Mazin, S Mender, S Mićanović, D Miceli, T Miener, M Minev, J M Miranda, R Mirzoyan, E Molina, A Moralejo, D Morcuende, V Moreno, E Moretti, P Munar-Adrover, V Neustroev, C Nigro, K Nilsson, D Ninci, K Nishijima, K Noda, S Nozaki, Y Ohtani, T Oka, J Otero-Santos, M Palatiello, D Paneque, R Paoletti, J M Paredes, L Pavletić, P Peñil, C Perennes, M Persic, P G Prada Moroni, E Prandini, C Priyadarshi, I Puljak, W Rhode, M Ribó, J Rico, C Righi, A Rugliancich, L Saha, N Sahakyan, T Saito, S Sakurai, K Satalecka, B Schleicher, K Schmidt, T Schweizer, J Sitarek, I Šnidarić, D Sobczynska, A Spolon, A Stamerra, D Strom, M Strzys, Y Suda, T Surić, M Takahashi, F Tavecchio, P Temnikov, T Terzić, M Teshima, N Torres-Albà, L Tosti, S Truzzi, J van Scherpenberg, G Vanzo, M Vazquez Acosta, S Ventura, V Verguilov, C F Vigorito, V Vitale, I Vovk, M Will, D Zarić, Studying the nature of the unidentified gamma-ray source HESS J1841−055 with the MAGIC telescopes, Monthly Notices of the Royal Astronomical Society, Volume 497, Issue 3, September 2020, Pages 3734–3745, https://doi.org/10.1093/mnras/staa2135

Studying the nature of the unidentified gamma-ray source HESS J1841−055 with the MAGIC telescopes

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Author: Acciari, V. A.1; Ansoldi, S.2,3; Antonelli, L. A.4;
Engels, A. Arbet5; Asano, K.6; Baack, D.7; Babic, A.8; Banerjee, B.9; Baquero, A.10,11; Barres de Almeida, U.12; Barrio, J. A.10,11; Becerra Gonzalez, J.1,13; Bednarek, W.14; Bellizzi, L.15,16; Bernardini, E.17; Bernardos, M.18; Berti, A.19; Besenrieder, J.20; Bhattacharyya, W.17; Bigongiari, C.4; Biland, A.5; Blanch, O.21; Bonnoli, G.15,16; Bosnjak, Z.8; Busetto, G.22,23; Carosi, R.24,25; Ceribella, G.20; Cerruti, M.26; Chai, Y.20; Chilingarian, A.27; Cikota, S.8; Colak, S. M.21; Colombo, E.1; Contreras, J. L.10,11; Cortina, J.18; Covino, S.4; D'Amico, G.20; D'Elia, V4; Da Vela, P.24,25; Dazzi, F.4; De Angelis, A.22,23; De Lotto, B.2,3; Delfino, M.21,28; Delgado, J.21,28; Delgado Mendez, C.18; Depaoli, D.19; Di Girolamo, T.19; Di Pierro, F.19; Di Venere, L.19; Do Souto Espineira, E.21; Prester, D. Dominis29; Donini, A.2,3; Dorner, D.30; Doro, M.22,23; Elsaesser, D.7; Ramazani, V. Fallah31; Fattorini, A.7; Ferrara, G.4; Foffano, L.22,23; Fonseca, M., V10,11; Font, L.32,33; Fruck, C.20; Fukami, S.6; Garcia Lopez, R. J.1,13; Garczarczyk, M.17; Gasparyan, S.27; Gaug, M.32,33; Giglietto, N.19; Giordano, F.19; Gliwny, P.14; Godinovic, N.34; Green, D.20; Hadasch, D.6; Hahn, A.20; Heckmann, L.20; Herrera, J.1,13; Hoang, J.10,11; Hrupec, D.35; Huetten, M.20; Inada, T.6; Inoue, S.6; Ishio, K.20; Iwamura, Y.6; Jouvin, L.21; Kajiwara, Y.36; Karjalainen, M.1; Kerszberg, D.21; Kobayashi, Y.6; Kubo, H.36; Kushida, J.37; Lamastra, A.4; Lelas, D.34; Leone, F.4; Lindfors, E.31; Lombardi, S.4; Longo, F.2,3,38; Lopez, M.10,11; Lopez-Coto, R.22,23; Lopez-Oramas, A.1,13; Loporchio, S.19; Machado de Oliveira Fraga, B.12; Maggio, C.32,33; Majumdar, P.9; Makariev, M.39; Mallamaci, M.22,23; Maneva, G.39; Manganaro, M.29; Mannheim, K.30; Maraschi, L.4; Mariotti, M.22,23; Martinez, M.21; Mazin, D.6; Mender, S.7; Micanovic, S.29; Miceli, D.2,3; Miener, T.10,11; Minev, M.39; Miranda, J. M.15,16; Mirzoyan, R.20; Molina, E.26; Moralejo, A.21; Morcuende, D.10,11; Moreno, V32,33; Moretti, E.21; Munar-Adrover, P.32,33; Neustroev, V40; Nigro, C.21; Nilsson, K.31; Ninci, D.21; Nishijima, K.37; Noda, K.6; Nozaki, S.36; Ohtani, Y.6; Oka, T.36; Otero-Santos, J.1,13; Palatiello, M.2,3; Paneque, D.20; Paoletti, R.15,16; Paredes, J. M.26; Pavletic, L.29; Penil, P.10,11; Perennes, C.22,23; Persic, M.2,3,41,42; Moroni, P. G. Prada24,25; Prandini, E.22,23; Priyadarshi, C.21; Puljak, I34; Rhode, W.7; Ribo, M.26; Rico, J.21; Righi, C.4; Rugliancich, A.24,25; Saha, L.10,11; Sahakyan, N.27; Saito, T.6; Sakurai, S.6; Satalecka, K.17; Schleicher, B.30; Schmidt, K.7; Schweizer, T.20; Sitarek, J.14; Snidaric, I43; Sobczynska, D.14; Spolon, A.22,23; Stamerra, A.4; Strom, D.20; Strzys, M.6; Suda, Y.20; Suric, T.43; Takahashi, M.6; Tavecchio, F.4; Temnikov, P.39; Terzic, T.29; Teshima, M.20; Torres-Alba, N.26; Tosti, L.19; Truzzi, S.15,16; van Scherpenberg, J.20; Vanzo, G.1,13; Vazquez Acosta, M.1,13; Ventura, S.15,16; Verguilov, V.39; Vigorito, C. F.19; Vitale, V.19; Vovk, I6; Will, M.20; Zaric, D.34
Organizations: 1Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain.
2Univ Udine, I-33100 Udine, Italy.
3INFN Trieste, I-33100 Udine, Italy.
4Natl Inst Astrophys INAF, I-00136 Rome, Italy.
5Swiss Fed Inst Technol, CH-8093 Zurich, Switzerland.
6Univ Tokyo, Japanese MAGIC Grp ICRR, Kashiwa, Chiba 2778582, Japan.
7Tech Univ Dortmund, D-44221 Dortmund, Germany.
8Univ Zagreb, Fac Elect Engn & Comp FER, Croatian MAGIC Grp, Zagreb 10000, Croatia.
9HBNI, Saha Inst Nucl Phys, 1-AF Bidhannagar Salt Lake,Sect 1, Kolkata 700064, India.
10Univ Complutense Madrid, IPARCOS Inst, E-28040 Madrid, Spain.
11Univ Complutense Madrid, EMFTEL Dept, E-28040 Madrid, Spain.
12URCA, Ctr Brasileiro Pesquisas Fis CBPF, BR-22290180 Rio De Janeiro, Brazil.
13Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain.
14Univ Lodz, Fac Phys & Appl Informat, Dept Astrophys, PL-90236 Lodz, Poland.
15Univ Siena, I-53100 Siena, Italy.
16INFN Pisa, I-53100 Siena, Italy.
17Deutsch Elektronen Synchrotron DESY, D-15738 Zeuthen, Germany.
18Ctr Invest Energet Meioambientales & Tecnol, E-28040 Madrid, Spain.
19Ist Nazl Fis Nucl INFN, I-00044 Rome, Italy.
20Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
21Barcelona Inst Sci & Technol BIST, Inst Fis Altes Energies IFAE, E-08193 Bellaterra, Barcelona, Spain.
22Univ Padua, I-35131 Padua, Italy.
23Ist Nazl Fis Nucl, I-35131 Padua, Italy.
24Univ Pisa, I-56126 Pisa, Italy.
25INFN Pisa, I-56126 Pisa, Italy.
26Univ Barcelona, IEEC UB, ICCUB, E-08028 Barcelona, Spain.
27NAS RA, Armenian Mag Grp, ICRANet Armenia, Yerevan 0019, Armenia.
28Port Informacio Cient, E-08193 Bellaterra, Barcelona, Spain.
29Univ Rijeka, Dept Phys, Croatian MAGIC Grp, Rijeka 51000, Croatia.
30Univ Wurzburg, D-97074 Wurzburg, Germany.
31Univ Turku, ESO, Finnish Ctr Astron, Finnish MAGIC Grp, FI-20014 Turku, Finland.
32Univ Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, Spain.
33Univ Autonoma Barcelona, CERES IEEC, E-08193 Bellaterra, Spain.
34Univ Split, Fac Elect Engn Mech Engn & Naval Architecture FES, Croatian MAGIC Grp, Split 21000, Croatia.
35Univ Osijek, Croatian MAGIC Grp, Osijek 31000, Croatia.
36Kyoto Univ, Dept Phys, Japanese MAGIC Grp, Kyoto 6068502, Japan.
37Tokai Univ, Dept Phys, Japanese MAGIC Grp, Hiratsuka, Kanagawa 2591292, Japan.
38Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
39Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, BG-1784 Sofia, Bulgaria.
40Univ Oulu, Astron Res Unit, Finnish MAGIC Grp, FI-90014 Oulu, Finland.
41Univ Bologna, INAF Trieste, Bologna, Italy.
42Univ Bologna, Dept Phys & Astron, Bologna, Italy.
43Rudjer Boskovic Inst, Croatian MAGIC Grp, Zagreb 10000, Croatia.
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.3 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2020111089833
Language: English
Published: Oxford University Press, 2020
Publish Date: 2020-11-10
Description:

Abstract

We investigate the physical nature and origin of the gamma-ray emission from the extended source HESS J1841−055 observed at TeV and GeV energies. We observed HESS J1841−055 at TeV energies for a total effective time of 43 h with the MAGIC telescopes, in 2012 and 2013. Additionally, we analysed the GeV counterpart making use of about 10 yr of Fermi-LAT data. Using both Fermi-LAT and MAGIC, we study both the spectral and energy-dependent morphology of the source for almost four decades of energy. The origin of the gamma-ray emission from this region is investigated using multiwaveband information on sources present in this region, suggested to be associated with this unidentified gamma-ray source. We find that the extended emission at GeV–TeV energies is best described by more than one source model. We also perform the first energy-dependent analysis of the HESS J1841−055 region at GeV–TeV. We find that the emission at lower energies comes from a diffuse or extended component, while the major contribution of gamma rays above 1 TeV arises from the southern part of the source. Moreover, we find that a significant curvature is present in the combined observed spectrum of MAGIC and Fermi-LAT. The first multiwavelength spectral energy distribution of this unidentified source shows that the emission at GeV–TeV energies can be well explained with both leptonic and hadronic models. For the leptonic scenario, bremsstrahlung is the dominant emission compared to inverse Compton. On the other hand, for the hadronic model, gamma-ray resulting from the decay of neutral pions (π⁰) can explain the observed spectrum. The presence of dense molecular clouds overlapping with HESS J1841−055 makes both bremsstrahlung and π⁰-decay processes the dominant emission mechanisms for the source.

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Series: Monthly notices of the Royal Astronomical Society
ISSN: 0035-8711
ISSN-E: 1365-8711
ISSN-L: 0035-8711
Volume: 497
Issue: 3
Pages: 3734 - 3745
DOI: 10.1093/mnras/staa2135
OADOI: https://oadoi.org/10.1093/mnras/staa2135
Type of Publication: A1 Journal article – refereed
Field of Science: 115 Astronomy and space science
Subjects:
Funding: The financial support by the German BMBF and MPG; the Italian INFN and INAF; the Swiss National Fund SNF; the ERDF under the Spanish MINECO (FPA2015-69818-P, FPA2012-36668, FPA2015-68378-P, FPA2015-69210-C6-2-R, FPA2015-69210-C6-4-R, FPA2015-69210-C6-6-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2015-71662-C2-2-P, and FPA2017-90566-REDC); the Indian Department of Atomic Energy; and the Japanese JSPS and MEXT; the Bulgarian Ministry of Education and Science, National RI Roadmap Project DO1-153/28.08.2018 and the Academy of Finland grant nr. 320045 is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia ‘Severo Ochoa’ SEV-2012-0234 and SEV-2015-0548, and Unidad de Excelencia ‘Maria de Maeztu’ MDM-2014-0369, by the Croatian Science Foundation (HrZZ) Project 09/176 and the University of Rijeka Project 13.12.1.3.02, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, and by the Polish National Research Centre grant UMO-2016/22/M/ST9/00382 and by the Brazilian MCTIC, CNPq and FAPERJ. This publication makes use of molecular line data from the Boston University-FCRAO Galactic Ring Survey (GRS). The GRS is a joint project of Boston University and Five College Radio Astronomy Observatory, funded by the National Science Foundation under grants AST-9800334, AST-0098562, AST-0100793, AST-0228993, and AST-0507657.
Copyright information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2020 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.