Abdalla H, Abramowski A, Aharonian F, Benkhali FA, Akhperjanian AG, Andersson T, Anguener O, Arrieta M, Aubert P, Backes M, Balzer A, Barnard M, Becherini Y, Tjus JB, Berge D, Bernhard S, Bernloehr K, Blackwell R, Boettcher M, Boisson C, Bolmont J, Bordas P, Bregeon J, Brun F, Brun P, Bryan M, Bulik T, Capasso M, Carr J, Casanova S, Cerruti M, Chakraborty N, Chalme-Calvet R, Chaves RCG, Chen A, Chevalier J, Chretien M, Colafrancesco S, Cologna G, Condon B, Conrad J, Cui Y, Davids ID, Decock J, Degrange B, Deil C, Devin J, Dewilt P, Dirson L, Djannati-Atai A, Domainko W, Donath A, Drury LO, Dubus G, Dutson K, Dyks J, Edwards T, Egberts K, Eger P, Ernenwein JP, Eschbach S, Farnier C, Fegan S, Fernandes MV, Fiasson A, Fontaine G, Foerster A, Funk S, Fuessling M, Gabici S, Gajdus M, Gallant YA, Garrigoux T, Giavitto G, Giebels B, Glicenstein JF, Gottschall D, Goyal A, Grondin MH, Hadasch D, Hahn J, Haupt M, Hawkes J, Heinzelmann G, Henri G, Hermann G, Hervet O, Hinton JA, Hofmann W, Hoischen C, Holler M, Horns D, Ivascenko A, Jacholkowska A, Jamrozy M, Janiak M, Jankowsky D, Jankowsky F, Jingo M, Jogler T, Jouvin L, Jung-Richardt I, Kastendieck MA, Katarzynski K, Katz U, Kerszberg D, Khelifi B, Kieffer M, King J, Klepser S, Klochkov D, Kluzniak W, Kolitzus D, Komin N, Kosack K, Krakau S, Kraus M, Krayzel F, Krueger PP, Laffon H, Lamanna G, Lau J, Lees JP, Lefaucheur J, Lefranc V, Lemiere A, Lemoine-Goumard M, Lenain JP, Leser E, Lohse T, Lorentz M, Liu R, Lopez-Coto R, Lypova I, Marandon V, Marcowith A, Mariaud C, Marx R, Maurin G, Maxted N, Mayer M, Meintjes PJ, Meyer M, Mitchell AMW, Moderski R, Mohamed M, Mohrmann L, Mora K, Moulin E, Murach T, De Naurois M, Niederwanger F, Niemiec J, Oakes L, O'Brien P, Odaka H, Oettl S, Ohm S, Ostrowski M, Oya I, Padovani M, Panter M, Parsons RD, Pekeur NW, Pelletier G, Perennes C, Petrucci PO, Peyaud B, Piel Q, Pita S, Poon H, Prokhorov D, Prokoph H, Puehlhofer G, Punch M, Quirrenbach A, Raab S, Reimer A, Reimer O, Renaud M, De Los Reyes R, Rieger F, Romoli C, Rosier-Lees S, Rowell G, Rudak B, Rulten CB, Sahakian V, Salek D, Sanchez DA, Santangelo A, Sasaki M, Schlickeiser R, Schuessler F, Schulz A, Schwanke U, Schwemmer S, Settimo M, Seyffert AS, Shafi N, Shilon I, Simoni R, Sol H, Spanier F, Spengler G, Spies F, Stawarz L, Steenkamp R, Stegmann C, Stinzing F, Stycz K, Sushch I, Tavernet JP, Tavernier T, Taylor AM, Terrier R, Tibaldo L, Tiziani D, Tluczykont M, Trichard C, Tuffs R, Uchiyama Y, Van Der Walt DJ, van Eldik C, Van Rensburg C, Van Soelen B, Vasileiadis G, Veh J, Venter C, Viana A, Vincent P, Vink J, Voisin F, Voelk HJ, Vuillaume T, Wadiasingh Z, Wagner SJ, Wagner P, Wagner RM, White R, Wierzcholska A, Willmann P, Wörnlein A, Wouters D, Yang R, Zabalza V, Zaborov D, Zacharias M, Zdziarski AA, Zech A, Zefi F, Ziegler A, Zywucka N, Katsuta J (2018)
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2018
Publisher: EDP SCIENCES S A
Book Volume: 612
Article Number: A5
DOI: 10.1051/0004-6361/201527843
The supernova remnant (SNR) W49B originated from a core-collapse supernova that occurred between one and four thousand years ago, and subsequently evolved into a mixed-morphology remnant, which is interacting with molecular clouds (MC). Gamma-ray observations of SNR-MC associations are a powerful tool to constrain the origin of Galactic cosmic rays, as they can probe the acceleration of hadrons through their interaction with the surrounding medium and subsequent emission of non-thermal photons. We report the detection of a gamma-ray source coincident with W49B at very high energies (VHE; E > 100 GeV) with the H.E.S.S. Cherenkov telescopes together with a study of the source with five years of Fermi-LAT high-energy gamma-ray (0.06-300 GeV) data. The smoothly connected, combined source spectrum, measured from 60 MeV to multi-TeV energies, shows two significant spectral breaks at 304 +/- 20 MeV and 8.4(-2.5)(+2.5) GeV; the latter is constrained by the joint fit from the two instruments. The detected spectral features are similar to those observed in several other SNR-MC associations and are found to be indicative of gamma-ray emission produced through neutral-pion decay.
APA:
Abdalla, H., Abramowski, A., Aharonian, F., Benkhali, F.A., Akhperjanian, A.G., Andersson, T.,... Katsuta, J. (2018). The supernova remnant W49B as seen with HESS and Fermi-LAT. Astronomy & Astrophysics, 612. https://dx.doi.org/10.1051/0004-6361/201527843
MLA:
Abdalla, H., et al. "The supernova remnant W49B as seen with HESS and Fermi-LAT." Astronomy & Astrophysics 612 (2018).
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