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Type: Conference paper
Title: H.E.S.S. observations of massive stellar clusters
Author: Ohm, S.
Horns, D.
Reimer, O.
Hinton, J.
Rowell, G.
de Ona Wilhelmi, E.
Fernandes, M.
Acero, F.
Marcowith, A.
Citation: Proceedings of High Energy Phenomena in Massive Stars, held in Jaén, Spain 2-5 Feb 2009, 2010 / J. Martí, P. Luque-Escamilla and J. Combi (eds.): pp.265-275
Publisher: ASP
Issue Date: 2010
Series/Report no.: ASP Conference Proceedings Series ; 422
ISBN: 9781583817247
Conference Name: High Energy Phenomena in Massive Stars Conference (2009 : Jaén, Spain)
Statement of
Stefan Ohm, Dieter Horns, Olaf Reimer, Jim Hinton, Gavin Rowell, Emma de Ona Wilhelmi, Milton Virgilio Fernandes, Fabio Acero, and Alexandre Marcowith
Abstract: Stellar clusters are potential acceleration sites of very-high-energy (VHE, E> 100GeV) particles since they host supernova remnants (SNRs) and pulsar wind nebulae (PWNe). Additionally, in stellar clusters, particles can also be accelerated e.g. at the boundaries of wind-blown bubbles, in colliding wind zones in massive binary systems or in the framework of collective wind or wind/supernova(SN) ejecta scenarios. Motivated by the detection of VHE-ray emission towards Westerlund 2 and assuming similar particle acceleration mechanisms at work, Westerlund 1 is an even more promising target for VHE -ray observations given that massive star content and distance are more favourable for detectable VHE -ray emission compared to Westerlund 2. Here, H.E.S.S. observations of massive stellar clusters in general with special emphasis on the most massive stellar cluster in the galaxy, Westerlund 1 are summarized.
Rights: Copyright 2010 by Astronomical Society of the Pacific ASP Conference Series All rights reserved.
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