Event calendar file
- icrc2007@icrc2007.unam.mx
Support
HESSJ1023-575: Non-thermal particle acceleration associated with a young stellar cluster?
Speakers
- Mr. Martin RAUE
Primary authors
- Dr. Olaf REIMER (HEPL/KIPAC, Stanford University)
Co-authors
- Dr. Jim HINTON (School of Physics & Astronomy, University of Leeds, UK)
- Prof. Werner HOFMANN (Max-Planck-Institut für Kernphysik, Heidelberg, Germany)
- Mr. Stefan HOPPE (Max-Planck-Institut für Kernphysik, Heidelberg, Germany)
- Dr. Conor MASTERSON (School of Cosmic Physics, Dublin Institute for Advanced Studies, Ireland)
- Mr. Martin RAUE (Institut für Experimentalphysik, Universität Hamburg, Germany)
Files
Abstract content
The results from H.E.S.S. observations towards Westerlund 2 are presented. The detection of very-high-energy gamma-ray emission towards the young stellar cluster Westerlund 2 in the HII complex RCW49 by H.E.S.S. provides ample evidence that particle acceleration to extreme energies is associated with this region. A variety of possible emission scenarios will be reviewed, ranging from high-energy gamma-ray production in the colliding wind zone of the massive Wolf-Rayet binary WR20a, collective wind scenarios, diffusive shock acceleration at the boundaries of wind-blown bubbles in the stellar cluster, and outbreak phenomena from hot stellar winds into the interstellar medium. These scenarios are compared to the characteristics of the associated new VHE gamma-ray source HESSJ1023-575, and conclusions on the validity of existing emission scenarios for high-energy gamma-ray production are drawn.
If this papers is presented for a collaboration, please specify the collaboration
H.E.S.S. Collaboration
Reference
Proceedings of the 30th International Cosmic Ray Conference; Rogelio Caballero, Juan Carlos D'Olivo, Gustavo Medina-Tanco, Lukas Nellen, Federico A. Sánchez, José F. Valdés-Galicia (eds.); Universidad Nacional Autónoma de México, Mexico City, Mexico, 2008; Vol. 2 (OG part 1), pages 567-570
