https://doi.org/10.1051/epjconf/202531905003
Gamma ray emission from embedded young massive star clusters unveiled by Fermi-LAT
1 INAF Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi, 5, 50125, Forence, Italy
2 Instituto de Astrofìsica de Andalucìa, CSIC, 18080 Granada, Spain
* e-mail: giada.peron@inaf.it
Published online: 6 March 2025
Massive star clusters (SCs) have been proposed as additional contributors to Galactic Cosmic rays (CRs), to overcome the limitations of supernova remnants (SNR) to reach the highest energy end of the Galactic CR spectrum. Thanks to fast mass losses through collective stellar winds, the environment around SCs is potentially suitable for particle acceleration up to PeV energies. A handful of star clusters has been detected in gamma-rays confirming the idea that particle acceleration is taking place in these environments. Here we present a new anal- ysis of Fermi-LAT data collected towards a few massive young star clusters and estimate the contribution of these types of sources to the bulk of CRs. We then briefly discuss the observational prospects for ASTRI and CTAO.
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
