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

Acciari, V. A.; Ansoldi, S.; Antonelli, L. A.; Engels, A. Arbet; Asano, K.; Baack, D.; Babic, A.; Banerjee, B.; Baquero, A.; Barres de Almeida, U.; Barrio, J. A.; Becerra Gonzalez, J.; Bednarek, W.; Bellizzi, L.; Bernardini, E.; Bernardos, M.; Berti, A.; Besenrieder, J.; Bhattacharyya, W.; Bigongiari, C.; Biland, A.; Blanch, O.; Bonnoli, G.; Bosnjak, Z.; Busetto, G.; Carosi, R.; Ceribella, G.; Cerruti, M.; Chai, Y.; Chilingarian, A.; Cikota, S.; Colak, S. M.; Colombo, E.; Contreras, J. L.; Cortina, J.; Covino, S.; D'Amico, G.; D'Elia, V; Da Vela, P.; Dazzi, F.; De Angelis, A.; De Lotto, B.; Delfino, M.; Delgado, J.; Delgado Mendez, C.; Depaoli, D.; Di Girolamo, T.; Di Pierro, F.; Di Venere, L.; Do Souto Espineira, E.; Prester, D. Dominis; Donini, A.; Dorner, D.; Doro, M.; Elsaesser, D.; Ramazani, V. Fallah; Fattorini, A.; Ferrara, G.; Foffano, L.; Fonseca, M., V; Font, L.; Fruck, C.; Fukami, S.; Garcia Lopez, R. J.; Garczarczyk, M.; Gasparyan, S.; Gaug, M.; Giglietto, N.; Giordano, F.; Gliwny, P.; Godinovic, N.; Green, D.; Hadasch, D.; Hahn, A.; Heckmann, L.; Herrera, J.; Hoang, J.; Hrupec, D.; Huetten, M.; Inada, T.; Inoue, S.; Ishio, K.; Iwamura, Y.; Jouvin, L.; Kajiwara, Y.; Karjalainen, M.; Kerszberg, D.; Kobayashi, Y.; Kubo, H.; Kushida, J.; Lamastra, A.; Lelas, D.; Leone, F.; Lindfors, E.; Lombardi, S.; Longo, F.; Lopez, M.; Lopez-Coto, R.; Lopez-Oramas, A.; Loporchio, S.; Machado de Oliveira Fraga, B.; Maggio, C.; Majumdar, P.; Makariev, M.; Mallamaci, M.; Maneva, G.; Manganaro, M.; Mannheim, K.; Maraschi, L.; Mariotti, M.; Martinez, M.; Mazin, D.; Mender, S.; Micanovic, S.; Miceli, D.; Miener, T.; Minev, M.; Miranda, J. M.; Mirzoyan, R.; Molina, E.; Moralejo, A.; Morcuende, D.; Moreno, V; Moretti, E.; Munar-Adrover, P.; Neustroev, V; Nigro, C.; Nilsson, K.; Ninci, D.; Nishijima, K.; Noda, K.; Nozaki, S.; Ohtani, Y.; Oka, T.; Otero-Santos, J.; Palatiello, M.; Paneque, D.; Paoletti, R.; Paredes, J. M.; Pavletic, L.; Penil, P.; Perennes, C.; Persic, M.; Moroni, P. G. Prada; Prandini, E.; Priyadarshi, C.; Puljak, I; Rhode, W.; Ribo, M.; Rico, J.; Righi, C.; Rugliancich, A.; Saha, L.; Sahakyan, N.; Saito, T.; Sakurai, S.; Satalecka, K.; Schleicher, B.; Schmidt, K.; Schweizer, T.; Sitarek, J.; Snidaric, I; Sobczynska, D.; Spolon, A.; Stamerra, A.; Strom, D.; Strzys, M.; Suda, Y.; Suric, T.; Takahashi, M.; Tavecchio, F.; Temnikov, P.; Terzic, T.; Teshima, M.; Torres-Alba, N.; Tosti, L.; Truzzi, S.; van Scherpenberg, J.; Vanzo, G.; Vazquez Acosta, M.; Ventura, S.; Verguilov, V.; Vigorito, C. F.; Vitale, V.; Vovk, I; Will, M.; Zaric, D. (2020-07-24)
 
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URL:
https://doi.org/10.1093/mnras/staa2135

Acciari, V. A.
Ansoldi, S.
Antonelli, L. A.
Engels, A. Arbet
Asano, K.
Baack, D.
Babic, A.
Banerjee, B.
Baquero, A.
Barres de Almeida, U.
Barrio, J. A.
Becerra Gonzalez, J.
Bednarek, W.
Bellizzi, L.
Bernardini, E.
Bernardos, M.
Berti, A.
Besenrieder, J.
Bhattacharyya, W.
Bigongiari, C.
Biland, A.
Blanch, O.
Bonnoli, G.
Bosnjak, Z.
Busetto, G.
Carosi, R.
Ceribella, G.
Cerruti, M.
Chai, Y.
Chilingarian, A.
Cikota, S.
Colak, S. M.
Colombo, E.
Contreras, J. L.
Cortina, J.
Covino, S.
D'Amico, G.
D'Elia, V
Da Vela, P.
Dazzi, F.
De Angelis, A.
De Lotto, B.
Delfino, M.
Delgado, J.
Delgado Mendez, C.
Depaoli, D.
Di Girolamo, T.
Di Pierro, F.
Di Venere, L.
Do Souto Espineira, E.
Prester, D. Dominis
Donini, A.
Dorner, D.
Doro, M.
Elsaesser, D.
Ramazani, V. Fallah
Fattorini, A.
Ferrara, G.
Foffano, L.
Fonseca, M., V
Font, L.
Fruck, C.
Fukami, S.
Garcia Lopez, R. J.
Garczarczyk, M.
Gasparyan, S.
Gaug, M.
Giglietto, N.
Giordano, F.
Gliwny, P.
Godinovic, N.
Green, D.
Hadasch, D.
Hahn, A.
Heckmann, L.
Herrera, J.
Hoang, J.
Hrupec, D.
Huetten, M.
Inada, T.
Inoue, S.
Ishio, K.
Iwamura, Y.
Jouvin, L.
Kajiwara, Y.
Karjalainen, M.
Kerszberg, D.
Kobayashi, Y.
Kubo, H.
Kushida, J.
Lamastra, A.
Lelas, D.
Leone, F.
Lindfors, E.
Lombardi, S.
Longo, F.
Lopez, M.
Lopez-Coto, R.
Lopez-Oramas, A.
Loporchio, S.
Machado de Oliveira Fraga, B.
Maggio, C.
Majumdar, P.
Makariev, M.
Mallamaci, M.
Maneva, G.
Manganaro, M.
Mannheim, K.
Maraschi, L.
Mariotti, M.
Martinez, M.
Mazin, D.
Mender, S.
Micanovic, S.
Miceli, D.
Miener, T.
Minev, M.
Miranda, J. M.
Mirzoyan, R.
Molina, E.
Moralejo, A.
Morcuende, D.
Moreno, V
Moretti, E.
Munar-Adrover, P.
Neustroev, V
Nigro, C.
Nilsson, K.
Ninci, D.
Nishijima, K.
Noda, K.
Nozaki, S.
Ohtani, Y.
Oka, T.
Otero-Santos, J.
Palatiello, M.
Paneque, D.
Paoletti, R.
Paredes, J. M.
Pavletic, L.
Penil, P.
Perennes, C.
Persic, M.
Moroni, P. G. Prada
Prandini, E.
Priyadarshi, C.
Puljak, I
Rhode, W.
Ribo, M.
Rico, J.
Righi, C.
Rugliancich, A.
Saha, L.
Sahakyan, N.
Saito, T.
Sakurai, S.
Satalecka, K.
Schleicher, B.
Schmidt, K.
Schweizer, T.
Sitarek, J.
Snidaric, I
Sobczynska, D.
Spolon, A.
Stamerra, A.
Strom, D.
Strzys, M.
Suda, Y.
Suric, T.
Takahashi, M.
Tavecchio, F.
Temnikov, P.
Terzic, T.
Teshima, M.
Torres-Alba, N.
Tosti, L.
Truzzi, S.
van Scherpenberg, J.
Vanzo, G.
Vazquez Acosta, M.
Ventura, S.
Verguilov, V.
Vigorito, C. F.
Vitale, V.
Vovk, I
Will, M.
Zaric, D.
Oxford University Press
24.07.2020

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

https://rightsstatements.org/vocab/InC/1.0/
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.
https://rightsstatements.org/vocab/InC/1.0/
doi:https://doi.org/10.1093/mnras/staa2135
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https://urn.fi/URN:NBN:fi-fe2020111089833
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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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