Tsuji N, Takekawa S, Mori K, Mitchell A, Zhang S, Bangale P, DiKerby S, Ergin T, Woo J, Safi-Harb S, Kasuya S (2025)
Publication Type: Journal article
Publication year: 2025
Book Volume: 983
Article Number: 22
Journal Issue: 1
We report a new CO observation survey of LHAASO J0341+5258, using the Nobeyama Radio Observatory 45-m telescope. LHAASO J0341+5258 is one of the unidentified ultra-high-energy (UHE; E > 100 TeV) gamma-ray sources detected by LHAASO. Our CO observations were conducted in 2024 February and March, with a total observation time of 36 hr, covering the LHAASO source (∼0 . ° 3-0 . ° 5 in radius) and its surrounding area (1° × 1 . ° 5). Within the LHAASO source extent, we identified five compact (<2 pc) molecular clouds at nearby distances (<1-4 kpc). These clouds can serve as proton-proton collision targets, producing hadronic gamma rays via neutral pion decays. Based on the hydrogen densities (700-5000 cm−3) estimated from our CO observations and archived H i data from the Dominion Radio Astrophysical Observatory survey, we derive the total proton energy of W
APA:
Tsuji, N., Takekawa, S., Mori, K., Mitchell, A., Zhang, S., Bangale, P.,... Kasuya, S. (2025). Detection of Molecular Clouds in the PeVatron Candidate Source LHAASO J0341+5258 by the Nobeyama 45-m Radio Telescope. Astrophysical Journal, 983(1). https://doi.org/10.3847/1538-4357/adb7df
MLA:
Tsuji, Naomi, et al. "Detection of Molecular Clouds in the PeVatron Candidate Source LHAASO J0341+5258 by the Nobeyama 45-m Radio Telescope." Astrophysical Journal 983.1 (2025).
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