High-energy γ-ray detection of supernova remnants in the Large Magellanic Cloud
Abstract
We present the results of a cluster search in the γ-ray sky images of the Large Magellanic Cloud (LMC) region by means of the Minimum Spanning Tree (MST) and DBSCAN algorithms, at energies higher than 6 and 10 GeV, using 12 yr of Fermi-LAT data. Several significant clusters were found, the majority of which associated with previously known γ-ray sources. We confirm our previous detection of the supernova remnants N 49B and N 63A and found new significant clusters associated with the SNRs N 49, N 186D, and N 44. These sources are among the brightest X-ray remnants in the LMC and corresponds to core-collapse supernovae interacting with dense H II regions, indicating that a hadronic origin of high-energy photons is the most likely process.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- September 2022
- DOI:
- 10.1093/mnras/stac1875
- arXiv:
- arXiv:2207.01272
- Bibcode:
- 2022MNRAS.515.1676C
- Keywords:
-
- ISM: supernova remnants;
- Magellanic Clouds;
- gamma-rays: galaxies;
- gamma-rays: general;
- Astrophysics - High Energy Astrophysical Phenomena;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- 14 pages, 4 figures. Accepted for publication in MNRAS