Acceleration of petaelectronvolt protons in the Galactic Centre

@article{Abramowski2016AccelerationOP,
  title={Acceleration of petaelectronvolt protons in the Galactic Centre},
  author={H.E.S.S. collaboration A. Abramowski and Felix Aharonian and Faical Ait Benkhali and A. G. Akhperjanian and E. O. Anguner and Michael Backes and Arnim Balzer and Y Becherini and Julia K. Becker Tjus and David Berge and Sabrina Bernhard and Konrad Bernlohr and Emrah Birsin and Rebecca Blackwell and Markus Bottcher and Catherine Boisson and Julien Bolmont and Pol Bordas and Johan Bregeon and F. Brun and P. Brun and Mark Bryan and T. Bulik and J. Jeffrey Carr and S. Casanova and Nachiketa Chakraborty and R. Chalme-Calvet and Ryan C. G. Chaves and A. M. Chen and M. Chr'etien and Sergio Colafrancesco and Gabriele Cologna and J. Conrad and C. Couturier and Y. Cui and I. D. Davids and B. Degrange and Christoph Deil and P. deWilt and Arache Djannati-Atai and Wilfried F. Domainko and Axel Donath and Luke O'c. Drury and Guillaume Dubus and Kathleen Dutson and Jarosław Dyks and Michal Dyrda and T. D. P. Edwards and Kathrin Egberts and Peter Eger and J-P. Ernenwein and P. Espigat and Christian Farnier and Stephen Fegan and Fabrice Feinstein and Milton Virg{\'i}lio Fernandes and Diane Fernandez and A. Fiasson and G. Fontaine and Andreas Forster and Matthias Fussling and Stefano Gabici and Michael Gajdus and Yves A. Gallant and Tania Garrigoux and G. Giavitto and Berrie Giebels and J. F. Glicenstein and Daniel Gottschall and Arti Goyal and M.-H. Grondin and Mira Grudzi'nska and D. Hadasch and S. Haffner and Joachim Hahn and Jarryd Hawkes and G{\"o}tz Heinzelmann and Gilles Henri and German Hermann and O. Hervet and Andreas Hillert and J. A. Hinton and W. Hofmann and Petter Hofverberg and C. Hoischen and Markus Holler and Dieter Horns and Alex Ivascenko and A. Jacholkowska and Marek Jamrozy and Mateusz Janiak and Felix Jankowsky and Ira Jung-Richardt and Max Anton Kastendieck and K. Katarzy'nski and Uli Katz and D. Kerszberg and Bruno Kh'elifi and M. Kieffer and S. Klepser and Dmitry Klochkov and Wlodek Klu'zniak and D. Kolitzus and Nu. Komin and K. Kosack and Steffen Krakau and Fabien Krayzel and Petrus Paulus Kruger and H'elene Laffon and Giovanni Lamanna and J. C. Lau and Julien Lefaucheur and V. Lefranc and A. Lemi'ere and M. Lemoine-Goumard and J.-P. Lenain and Thomas Lohse and Anatoli N. Lopatin and C.-C. Lu and R. Lui and V. Marandon and Alexandre Marcowith and Carolina Mariaud and R. Marx and Gilles Maurin and Nigel I. Maxted and M. Mayer and Petrus J. Meintjes and Ulf Menzler and Manuel Meyer and A M W Mitchell and Rafal Moderski and Mahmoud Mohamed and Knut Dundas Moraa and Emmanuel Moulin and T. Murach and Mathieu de Naurois and Jacek Niemiec and Louise Beth Oakes and Hirokazu Odaka and S. Ottl and S. Ohm and B. Opitz and Michał Ostrowski and Igor Oya and Mike Panter and R. D. Parsons and Manuel Paz Arribas and Nikki Pekeur and Guy B. Pelletier and P.-O. Petrucci and Bernard Peyaud and Santiago Pita and Helen Poon and Heike Prokoph and Gerd Puhlhofer and M. Punch and Andreas Quirrenbach and S. Raab and Ignasi Reichardt and A. Reimer and O. Reimer and Matthieu Renaud and Raquel de los Reyes and Frank M. Rieger and Carlo Romoli and S. Rosier-Lees and Gavin Rowell and B. Rudak and Cameron B Rulten and Vardan Sahakian and David {\vS}{\'a}lek and D. A. Sanchez and A. Santangelo and M. Sasaki and Reinhard Schlickeiser and Fabian Schussler and Alexander Schulz and U. Schwanke and Stefanie Schwemmer and Albertus S. Seyffert and Rachel Simoni and H'elene Sol and Felix Spanier and Gerrit Spengler and F. Spies and Lukasz Stawarz and Riaan Steenkamp and Christian M Stegmann and F. Stinzing and Kornelia Stycz and Iurii Sushch and J-P. Tavernet and Thomas Tavernier and Andrew M. Taylor and R. Terrier and Martin Tluczykont and Cyril Trichard and Richard. J. Tuffs and Kathrin Valerius and Johan van der Walt and Christopher van Eldik and Brian van Soelen and Georges Vasileiadis and Johannes Veh and C. Venter and Aion Viana and Pascal Vincent and Jacco Vink and Fabien Voisin and Heinrich J. Volk and Thomas Vuillaume and Stefan J. Wagner and P. Wagner and Robert M. Wagner and Matthias Weidinger and Quirin Weitzel and R. M. White and Alicja Wierzcholska and P A Willmann and A. Wornlein and Denis Wouters and R. Yang and V'ictor Zabalza and Dmitry Zaborov and Michael Zacharias and Andrzej A. Zdziarski and Andreas Zech and Floriana Zefi and Natalia Żywucka},
  journal={Nature},
  year={2016},
  volume={531},
  pages={476-479}
}
Galactic cosmic rays reach energies of at least a few petaelectronvolts (of the order of 1015 electronvolts). This implies that our Galaxy contains petaelectronvolt accelerators (‘PeVatrons’), but all proposed models of Galactic cosmic-ray accelerators encounter difficulties at exactly these energies. Dozens of Galactic accelerators capable of accelerating particles to energies of tens of teraelectronvolts (of the order of 1013 electronvolts) were inferred from recent γ-ray observations… Expand
The Galactic Center: A Petaelectronvolt Cosmic-ray Acceleration Factory
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References

SHOWING 1-10 OF 56 REFERENCES
Gamma rays from supernova remnants
Abstract The recent galactic plane surveys with space- and ground-based detectors revealed a number of high and very-high energy γ-ray sources associated with young and middle-aged supernova remnantsExpand
Discovery of very-high-energy γ-rays from the Galactic Centre ridge
The source of Galactic cosmic rays (with energies up to 1015 eV) remains unclear, although it is widely believed that they originate in the shock waves of expanding supernova remnants. At present theExpand
Obtaining Cosmic-Ray Propagation Parameters from Diffuse Very High Energy Gamma-Ray Emission from the Galactic Center Ridge
The recent discovery of diffuse, very high energy (VHE) γ-radiation from the Galactic center ridge by the HESS telescope allows for the first time the direct determination of the parameters ofExpand
Acceleration of cosmic rays and gamma-ray emission from supernova remnants in the Galaxy
Galactic cosmic rays are believed to be accelerated at supernova remnant shocks. Though very popular and robust, this conjecture still needs a conclusive proof. The strongest support to this idea isExpand
Cosmic Ray Origin: Lessons from Ultra-High-Energy Cosmic Rays and the Galactic/Extragalactic Transition
We examine the question of the origin of the Galactic cosmic-rays (GCRs) in the light of the data available at the highest energy end of the spectrum. We argue that the data of the Pierre AugerExpand
Very High Energy Cosmic Gamma Radiation: A Crucial Window on the Extreme Universe
Gamma ray astronomy, the branch of high energy astrophysics that studies the sky in energetic γ-ray photons, is destined to play a crucial role in the exploration of nonthermal phenomena in theExpand
On the origin of galactic cosmic rays
Abstract It is shown that the relativistic jet, emitted from the center of the Galaxy during its activity, possessed power and energy spectrum of accelerated protons sufficient to explain the currentExpand
TeV Emission from the Galactic Center Black Hole Plerion
The HESS (High Energy Stereoscopic System) collaboration recently reported highly significant detection of TeV γ-rays coincident with Sgr A*. In the context of other Galactic center (GC)Expand
Inverse Compton scenarios for the TeV gamma-ray emission of the Galactic center
The intense Compton cooling of ultrarelativistic electrons in the Klein-Nishina regime in radiation-dominated environments, such as that found in the Galactic center, may result in radicallyExpand
Very-high energy observations of the galactic center region by veritas in 2010-2012
The Galactic center is an interesting region for high-energy (0.1-100 GeV) and very-high-energy (E > 100 GeV) gamma-ray observations. Potential sources of GeV/TeV gamma-ray emission have beenExpand
...
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