The young massive stellar cluster Westerlund 1 in gamma rays as seen with H.E.S.S.

Discussion timeslot (ZOOM-Meeting): 15. July 2021 - 18:00
ZOOM-Meeting URL: https://desy.zoom.us/j/98542982538
ZOOM-Meeting ID: 98542982538
ZOOM-Meeting Passcode: ICRC2021
Corresponding Session: https://icrc2021-venue.desy.de/channel/44-The-Origins-of-Galactic-Cosmic-Rays-GAD-GAI-CRD/125
Live-Stream URL: https://icrc2021-venue.desy.de/livestream/Discussion-04/5

Abstract:
'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.'

Authors: Lars Mohrmann | for the H.E.S.S. Collarboration
Co-Authors: Romed Rauth | Andreas Specovius | Christopher van Eldik | Stefan Ohm
Collaboration: H.E.S.S.

Indico-ID: 276
Proceeding URL: https://pos.sissa.it/395/789