Unveiling the molecular environment of the enigmatic PeVatron candidate LHAASO J2108+5157
Paper in proceeding, 2024
We summarize the results of previous works in which we analyzed the molecular environment around the PeVatron candidate LHAASO J2108+5157, using 12,13CO observations. As specific case, we present evidence that the observed sub-PeV emission is produced in two molecular clouds as cosmic-ray targets ([FKT-MC]2022 and [FTK-MC]) with two different LSR velocities but with the same distances. We recalculate the distance of [FKT-MC]2022, obtaining the value of 1.6 kpc. We suggest that both clouds are part of the same structure, where [FTK-MC] is blueshifted with respect to [FKT-MC]2022 favoring gravitational collapse and star formation.
Molecular lines: CO
PeVatrons
Individual: LHAASO J2108+5157
Author
I. Toledano–Juárez
University of Guadalajara
Eduardo De La Fuente
University of Guadalajara
K. Kawata
University of Tokyo
Daniel Tafoya
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Miguel A. Trinidad
Universidad de Guanajuato
Mitsuyoshi Yamagishi
University of Tokyo
S. Takekawa
Kanagawa University
M. Ohnishi
University of Tokyo
A. Nishimura
National Astronomical Observatory of Japan
Toshikazu Onishi
Osaka Metropolitan University
S. Kato
University of Guadalajara
T. Sako
University of Guadalajara
M. Takita
University of Guadalajara
H. Sano
Gifu University
R. K. Yadav
National Astronomical Research Institute of Thailand
Proceedings of Science
18248039 (eISSN)
Vol. 444 809
38th International Cosmic Ray Conference, ICRC 2023
Nagoya, Japan,
Nagoya, Japan,
Subject Categories (SSIF 2025)
Astronomy, Astrophysics, and Cosmology
DOI
10.22323/1.444.0809