PreprintCC BY 4.0arXiv
Diffuse gamma-ray emission in the vicinity of open cluster Berkeley 87
Abstract
Young massive stellar clusters have been recognized as a significant population of cosmic ray accelerators and gamma-ray sources. We report the detection of extended gamma-ray emission toward the young massive star cluster Berkeley 87 using 18 years of Fermi-LAT data. The hadronic scenario is favored given the dense gas and the cluster's strong stellar winds. The cluster can supply sufficient energy to power the observed gamma-ray emission. A nearby pulsar, PSR J2021+3651, associated with the Dragonfly pulsar wind nebula and the 4HWC source 4HWC J2021+3650, lies in the same field of view. We also discuss the maximum accelerated proton energy and electron energy density of this pulsar.
Versions
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BibTeX
@misc{ou2026diffuse,
title = {{Diffuse gamma-ray emission in the vicinity of open cluster Berkeley 87}},
author = {Ziwei Ou and Xiaolong Yang},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2605.17636},
eprint = {2605.17636},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2605.17636},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Diffuse gamma-ray emission in the vicinity of open cluster Berkeley 87
AU - Ziwei Ou
AU - Xiaolong Yang
PY - 2026
DA - 2026/09/22
PB - arXiv
DO - 10.48550/arxiv.2605.17636
UR - https://arxiv.org/abs/2605.17636
AB - Young massive stellar clusters have been recognized as a significant population of cosmic ray accelerators and gamma-ray sources. We report the detection of extended gamma-ray emission toward the young massive star cluster Berkeley 87 using 18 years of Fermi-LAT data. The hadronic scenario is favored given the dense gas and the cluster's strong stellar winds. The cluster can supply sufficient energy to power the observed gamma-ray emission. A nearby pulsar, PSR J2021+3651, associated with the Dragonfly pulsar wind nebula and the 4HWC source 4HWC J2021+3650, lies in the same field of view. We also discuss the maximum accelerated proton energy and electron energy density of this pulsar.
ER -