Discovery of very-high-energy γ-rays from the Galactic Centre ridge

@article{Aharonian2006DiscoveryOV,
  title={Discovery of very-high-energy $\gamma$-rays from the Galactic Centre ridge},
  author={Felix Aharonian and A. G. Akhperjanian and A. R. Bazer-Bachi and Matthias Beilicke and Wystan Benbow and David Berge and Konrad Bernl{\"o}hr and Catherine Boisson and O. Bolz and V. Borrel and Ilana M. Braun and Frank Breitling and A. M. Brown and Paula M Chadwick and L. M. Chounet and R. Cornils and L Costamante and B. Degrange and Hugh J. Dickinson and Arache Djannati-Ata{\"i} and Luke O'c. Drury and Guillaume Dubus and D. Emmanoulopoulos and P. Espigat and Fabrice Feinstein and Gilles Fontaine and Yael Fuchs and Stefan Funk and Yves A. Gallant and Berrie Giebels and Stefan Gillessen and J. F. Glicenstein and Philippe Goret and C. Hadjichristidis and Dominik Hauser and Marcus Hauser and G{\"o}tz Heinzelmann and Gilles Henri and German Hermann and J. A. Hinton and W. Hofmann and M. Holleran and Dieter Horns and A. Jacholkowska and Ocker C. de Jager and B. Kh{\'e}lifi and Stephanie Klages and Nu. Komin and Alexander K. Konopelko and I. J. Latham and Roland Le Gallou and Anne Lemi{\`e}re and Marianne Lemoine-Goumard and Nicolas Leroy and Thomas Lohse and Alexandre Marcowith and J. M. Martin and Olivier Martineau-Huynh and Conor Masterson and T. J. L. Mccomb and Mathieu de Naurois and S. J. Nolan and Aristeidis Noutsos and K. J. Orford and J. L. Osborne and Mohamed Ouchrif and Mike Panter and Guy Pelletier and Santiago Pita and Gerd P{\"u}hlhofer and M. Punch and B. C. Raubenheimer and Martin Raue and Julie Raux and Stephen Mark Rayner and Anita Reimer and O. Reimer and Joachim Ripken and L. Rob and Lo{\"i}c Rolland and Gavin Rowell and Vardan Sahakian and Ludovic Sauge and Stefan Schlenker and Reinhard Schlickeiser and C. U. Schuster and U. Schwanke and Mark Siewert and H'elene Sol and D. Spangler and Riaan Steenkamp and Christian M. Stegmann and J-P. Tavernet and R. Terrier and Claude G. Th{\'e}oret and Martin Tluczykont and Christopher van Eldik and Georges Vasileiadis and Christo Venter and Pascal Vincent and H. J. V{\"o}lk and S. J. Wagner},
  journal={Nature},
  year={2006},
  volume={439},
  pages={695-698}
}
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 the best way to investigate their acceleration and propagation is by observing the γ-rays produced when cosmic rays interact with interstellar gas. Here we report observations of an extended region of very-high-energy (> 1011 eV) γ-ray emission correlated spatially with a complex of giant molecular… 
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The diffuse gamma radiation arising from the interaction of cosmic-ray particles with matter and radiation in the Galaxy is one of the few probes available to study the origin of the cosmic rays.
INTERACTING COSMIC RAYS WITH MOLECULAR CLOUDS: A BREMSSTRAHLUNG ORIGIN OF DIFFUSE HIGH-ENERGY EMISSION FROM THE INNER 2°×1° OF THE GALACTIC CENTER
The high-energy activity in the inner few degrees of the Galactic center is traced by diffuse radio, X-ray, and γ-ray emission. The physical relationship between different components of diffuse gas
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