PoS - Proceedings of Science
Volume 444 - 38th International Cosmic Ray Conference (ICRC2023) - Gamma-ray Astronomy (GA)
High energy gamma-ray emission detected by LHAASO from SNR G150.3+4.5
H. Zeng*, Y. Guo, H. Wu, Y. Su, S. Liu and Y. Zhang
Full text: pdf
Pre-published on: August 14, 2023
Published on:
Abstract
Recent observations and theories suggest that GeV cosmic-rays are dominated by SNRs interacting with molecular clouds while TeV cosmic-ray may have significant contributions from other sources, such as PWNes. Now LHAASO-WCDA have enough significance with E=1 TeV for SNR G150.3+4.5. Its spatial distribution and extension are consistent with that of the radio and the GeV band revealed by Fermi, and the extension of about 1.5 degrees. A source inside SNR G150.3+4.5 is detected by LHAASO-KM2A with a total significance of 9.4 sigma for E $>$ 25 TeV. The best-fit source location is (R.A., Dec.)= $(66.63^{\circ}\pm 0.11^{\circ}, 54.63^{\circ} \pm 0.05^{\circ})$, and the Gaussian extension is $0.32^{\circ} \pm 0.06^{\circ}$. It is spatially coincident with 4FGL J0426.5+5434, which has a soft GeV spectrum reminiscent of a pulsar. The broadband nonthermal emission can be interpreted as a contribution of a supernova remnant and a PWNe or high density molecular clouds interacting with high energy proton.
DOI: https://doi.org/10.22323/1.444.0606
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.