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$\gamma$-ray Emission from Classical Nova V392 Per: Measurements from Fermi and HAWC
- Source :
- Astroph. J. 940(2) (2022) 141
- Publication Year :
- 2022
-
Abstract
- This paper reports on the $\gamma$-ray properties of the 2018 Galactic nova V392 Per, spanning photon energies $\sim$0.1 GeV to 100 TeV by combining observations from the Fermi Gamma-ray Space Telescope and the HAWC Observatory. In one of the most rapidly evolving $\gamma$-ray signals yet observed for a nova, GeV $\gamma$ rays with a power law spectrum with index $\Gamma = 2.0 \pm 0.1$ were detected over eight days following V392 Per's optical maximum. HAWC observations constrain the TeV $\gamma$-ray signal during this time and also before and after. We observe no statistically significant evidence of TeV $\gamma$-ray emission from V392 Per, but present flux limits. Tests of the extension of the Fermi/LAT spectrum to energies above 5 TeV are disfavored by 2 standard deviations (95\%) or more. We fit V392 Per's GeV $\gamma$ rays with hadronic acceleration models, incorporating optical observations, and compare the calculations with HAWC limits.<br />Comment: 18 pages, 14 figures; revised for referee comments; section 5 revised
- Subjects :
- Astrophysics - High Energy Astrophysical Phenomena
Subjects
Details
- Database :
- arXiv
- Journal :
- Astroph. J. 940(2) (2022) 141
- Publication Type :
- Report
- Accession number :
- edsarx.2201.10644
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.3847/1538-4357/ac966a