Abstract
This paper reports on the γ-ray properties of the 2018 Galactic nova V392 Per, spanning photon energies ∼0.1 GeV-100 TeV by combining observations from the Fermi Gamma-ray Space Telescope and the HAWC Observatory. As one of the most rapidly evolving γ-ray signals yet observed for a nova, GeV γ-rays with a power-law spectrum with an index Γ = 2.0 ± 0.1 were detected over 8 days following V392 Per's optical maximum. HAWC observations constrain the TeV γ-ray signal during this time and also before and after. We observe no statistically significant evidence of TeV γ-ray emission from V392 Per, but present flux limits. Tests disfavor the extension of the Fermi Large Area Telescope spectrum to energies above 5 TeV by 2 standard deviations (95%) or more. We fit V392 Per's GeV γ-rays with hadronic acceleration models, incorporating optical observations, and compare the calculations with HAWC limits.
Recommended Citation
A. Albert et al., "Γ-Ray Emission From Classical Nova V392 Per: Measurements From Fermi And HAWC," Astrophysical Journal, vol. 940, no. 2, article no. 141, American Astronomical Society; IOP Publishing, Dec 2022.
The definitive version is available at https://doi.org/10.3847/1538-4357/ac966a
Department(s)
Physics
Publication Status
Open Access
International Standard Serial Number (ISSN)
1538-4357; 0004-637X
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2025 The Authors, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
01 Dec 2022
Comments
National Science Foundation, Grant PRG1006