Computer Science
Scientific paper
Jul 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..921..220r&link_type=abstract
THE FIRST GLAST SYMPOSIUM. AIP Conference Proceedings, Volume 921, pp. 220-222 (2007).
Computer Science
Gamma-Ray Sources, Gamma-Ray Bursts, Stellar Clusters And Associations, Particle Acceleration, Hii Regions, Emission And Reflection Nebulae
Scientific paper
The detection of very-high-energy gamma-ray emission associated with the young stellar cluster Westerlund 2 in the HII complex RCW 49 by H.E.S.S. provides ample evidence that particle acceleration to extreme energies is associated with this region. The results from the H.E.S.S. observations towards Westerlund 2 are presented. A variety of potential emission scenarios has been laid out, ranging from high-energy gamma-ray production in the colliding wind zone of the massive Wolf-Rayet binary WR 20a, 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 recently detected VHE gamma-ray source HESS J1023-575, and conclusions on the validity of existing emission scenarios for high-energy gamma-ray production are drawn.
Hinton Jim
Hofmann Werner
Hoppe S.
Masterson C.
Raue Martin
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