Please use this identifier to cite or link to this item:
http://hdl.handle.net/2289/8556| Title: | Fermi-large area telescope detection of very high energy (>100 GeV) emission from misaligned jetted active galactic nuclei |
| Authors: | Tomar, Gunjan Paliya, Vaidehi S. Saikia, D.J. Stalin, C.S. |
| Keywords: | Galaxies: active Methods: data analysis Galaxies: jets Gamma rays: general |
| Issue Date: | 1-Sep-2025 |
| Publisher: | Elsevier |
| Citation: | Journal of High Energy Astrophysics, 2025, Vol. 49, p100454 |
| Abstract: | The detection of very-high-energy (VHE; >100 GeV) 𝛾-ray radiation from misaligned jetted Active Galactic Nuclei (AGN) challenges the emission models that primarily explain VHE emissions from beamed AGN, i.e., blazars. Using over 16 years of Fermi-Large Area Telescope (Fermi-LAT) Pass 8 data in the energy range 0.1−2 TeV, we systematically explore the VHE emission from a recently published sample of 160 radio galaxies. We identify 12 sources detected at > 4𝜎 confidence level (test statistic or TS>16), including nine with TS>25 and two Fanaroff-Riley type II objects. This detected sample includes seven out of eight previously known VHE objects. Two radio galaxies are detected in the VHE band for the first time, and we identify three promising candidates with 16<TS<25. Additionally, 13 objects are identified as candidate VHE emitters with at least one VHE photon detected with the Fermi-LAT. These findings expand the sample of known VHE-emitting radio galaxies, whose multiwavelength follow-up observations can help provide insights into the emission mechanisms, jet physics, and the contribution of misaligned AGN to the extragalactic 𝛾-ray background. |
| Description: | Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations) |
| URI: | http://hdl.handle.net/2289/8556 |
| ISSN: | 2214-4048 |
| Alternative Location: | https://ui.adsabs.harvard.edu/abs/2026JHEAp..4900454T/abstract https://arxiv.org/abs/2508.15921 https://doi.org/10.1016/j.jheap.2025.100454 https://inspirehep.net/literature/2963380 |
| Copyright: | 2025 Elsevier B.V. |
| Appears in Collections: | Research Papers (A&A) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2025_JHEA_Vol.49_100454.pdf Restricted Access | Retricted Access | 1.72 MB | Adobe PDF | View/Open Request a copy |
Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.