Speaker
Description
Massive stellar clusters have recently been hypothesised as candidates for the acceleration of hadronic cosmic rays up to PeV energies. Previously, the H.E.S.S. Collaboration has reported about very extended gamma-ray emission around Westerlund 1, the most massive young stellar cluster in the Milky Way. In this contribution we present an updated analysis that employs a new analysis technique and is based on a much larger data set, allowing us to constrain better the morphology and the energy spectrum of the emission. The analysis technique used is a three-dimensional likelihood analysis, which is especially well suited for largely extended sources. The origin of the gamma-ray emission will be discussed in light of recent multi-wavelength observations.
Keywords
HESS; stellar cluster; PeVatron; Gammapy
| Subcategory | Experimental Results |
|---|---|
| Collaboration | H.E.S.S. |
