1. The young massive stellar cluster Westerlund 1 in gamma rays as seen with H.E.S.S
- Author
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Lars Mohrmann, Hassan Abdalla, Felix Aharonian, Faical Ait-Benkhali, Oguzhan Anguener, Cornelia Arcaro, Celine Armand, Tom Armstrong, Halim Ashkar, Michael Backes, Vardan Baghmanyan, Victor Barbosa Martins, Anna Barnacka, Monica Barnard, Rowan William Batzofin, Yvonne Becherini, David Berge, Konrad Bernloehr, Baiyang Bi, Markus Böttcher, Catherine Boisson, Julien Bolmont, Mathieu Bony (de), Mischa Breuhaus, Robert Brose, Francois Brun, Tomasz Bulik, Thomas Bylund, Floriane Cangemi, Sami Caroff, Sabrina Casanova, Jaqueline Catalano, Pauline Chambery, Tej Bahadur Chand, Andrew Chen, Garret Cotter, Malgorzata Curlo, Hannah Dalgleish, Jean Damascene Mbarubucyeye, Isak Delberth Davids, James Davies, Justine Devin, Arache Djannati-Ataï, Anton Dmytriev, Axel Donath, Victor Doroshenko, Lente Dreyer, Louis Du Plessis, Connor Duffy, Kathrin Egberts, Sabrina Einecke, Jean-Pierre ERNENWEIN, Steven Fegan, Kirsty Feijen, Armand Fiasson, Gaëtan Fichet de Clairfontaine, Gerard Fontaine, Lott Frans, Matthias Fuessling, Stefan Funk, Stefano Gabici, Yves Gallant, Gianluca Giavitto, Luca Giunti, Dorit Glawion, Jean-Francois Glicenstein, Marie-Hélène Grondin, Sumari Hattingh, Maria Haupt, German HERMANN, Jim Hinton, Werner Hofmann, Clemens Hoischen, Tim Holch, Markus Holler, Dieter Horns, Zhi-Qiu Huang, David Huber, Mario Hörbe, Marek Jamrozy, Felix Jankowsky, Vikas Joshi, Ira JUNG, Eli Kasai, Krzysztof Katarzynski, Ulì Katz, Dmitry Khangulyan, Bruno Khelifi, Stefan Klepser, Wlodek Kluzniak, Nukri Komin, Ruslan Konno, Karl Kosack, Dmitriy Kostunin, Michael Kreter, Gašper Kukec Mezek, Anu Kundu, Giovanni Lamanna, Sebastien Le Stum, Anne Lemiere, Marianne Lemoine-Goumard, Jean-Philippe Lenain, Fabian Leuschner, Christelle Levy, Thomas Lohse, Anna Luashvili, Iryna Lypova, Jonathan Mackey, Jhilik Majumdar, Denys Malyshev, Dmitry Malyshev, Vincent Marandon, Paolo Marchegiani, Alexandre Marcowith, Arnaud Mares, Guillem Martí-Devesa, Ramin Marx, Gilles Maurin, Pieter Meintjes, Manuel Meyer, Alison Mitchell, Rafal Moderski, Alessandro Montanari, Chris Moore, Paul Morris, Emmanuel Moulin, Jacques Muller, Thomas Murach, Kaori Nakashima, Mathieu Naurois (de), Amid Nayerhoda, Hambeleleni Davids, Jacek Niemiec, Angel Noel, Paul O'Brien, Laenita Lorraine Oberholzer, Stefan Ohm, Laura Olivera-Nieto, Emma Ona-Wilhelmi (de), Michal Ostrowski, Sebastian Panny, Michael Panter, Dan Parsons, Giada Peron, Santiago Pita, Vincent Poireau, Dmitry A Prokhorov, Heike Prokoph, Gerd PUEHLHOFER, Michael Punch, Andreas Quirrenbach, Romed Rauth, Patrick Reichherzer, Anita Reimer, Olaf Reimer, Quentin Remy, Matthieu Renaud, Brian Reville, Frank Rieger, Carlo Romoli, Gavin P Rowell, Bronislaw Rudak, Hector Rueda Ricarte, Edna Ruiz Velasco, Vardan Sahakian, Simon Sailer, Heiko Salzmann, David Sanchez, Andrea Santangelo, Manami Sasaki, Johannes Schaefer, Hester Schutte, Ullrich Schwanke, Fabian Schüssler, Mohanraj Senniappan, Albert Seyffert, Jimmy N.S. Shapopi, Kleopas Shiningayamwe, Rachel Simoni, Atreyee Sinha, Helene Sol, Hugh Spackman, Andreas Specovius, Samuel Timothy Spencer, Marion Spir-Jacob, Lukasz Stawarz, Riaan Steenkamp, Christian Stegmann, Simon Steinmassl, Constantin Steppa, Lei Sun, Tadayuki Takahashi, Takaaki Tanaka, Thomas Tavernier, Andrew Taylor, Regis Terrier, Hannes Thiersen, Charles Thorpe-Morgan, Martin Tluczykont, Lenka Tomankova, Michelle Tsirou, Naomi Tsuji, Richard Tuffs, Yasunobu Uchiyama, Johann van der Walt, Christopher van Eldik, Carlo van Rensburg, Brian van Soelen, George Vasileiadis, Johannes Veh, Christo Venter, Pascal Vincent, Jacco Vink, Heinrich J. Völk, Stefan Wagner, Jason John Watson, Felix Werner, Richard White, Alicja Wierzcholska, Yu Wun Wong, Hend Mahmoud Yassin, Anke Yusafzai, Michael Zacharias, Roberta Zanin, Davit Zargaryan, Andrzej Zdziarski, Andreas Zech, Sylvia Zhu, Andreas Zmija, Samuel Zouari, Natalia Żywucka, Naurois , Mathieu, Ona-Wilhelmi , Emma, and Bony , Mathieu
- Subjects
Physics ,Milky Way ,Astrophysics::High Energy Astrophysical Phenomena ,Hadron ,Gamma ray ,Cosmic ray ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Likelihood analysis ,Energy spectrum ,Cluster (physics) ,ddc:530 ,Astrophysics - High Energy Astrophysical Phenomena ,Astrophysics::Galaxy Astrophysics - Abstract
37th International Cosmic Ray Conference, ICRC 2021, Berlin, online, Germany, 12 Jul 2021 - 23 Jul 2021; Proceedings of Science / International School for Advanced Studies (ICRC2021), 789 (2021). doi:10.22323/1.395.0789, 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, a 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 multi-wavelength observations., Published by SISSA, Trieste
- Published
- 2021
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