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Gamma-rays and neutrinos from RX J1713–3946 in a lepto–hadronic scenario
- Source :
- Mon.Not.Roy.Astron.Soc., Mon.Not.Roy.Astron.Soc., 2021, 508 (2), pp.2204-2209. ⟨10.1093/mnras/stab2380⟩
- Publication Year :
- 2021
- Publisher :
- Oxford University Press (OUP), 2021.
-
Abstract
- The gamma-ray emission of RX J1713–3946, despite being extensively studied in the GeV and TeV domains, remains poorly understood. This is mostly because, in this range, two competing mechanisms can efficiently produce gamma-rays: the inverse Compton scattering of accelerated electrons, and interactions of accelerated protons with the nuclei of the interstellar medium (ISM). In addition to the acceleration of particles from the thermal pool, the re-acceleration of pre-existing cosmic rays is often overlooked, and has in fact also been taken into account. Especially, because of the distance to the SNR (∼1 kpc), and the low density in which the shock is currently expanding (∼10−2 cm−3), the re-acceleration of cosmic-ray electrons pre-existing in the ISM can account for a significant fraction of the observed gamma-ray emission, and contribute to the shaping of the spectrum in the GeV–TeV range. Remarkably, this emission of leptonic origin is found to be close to the level of the gamma-ray signal in the TeV range, provided that the spectrum of pre-exisiting cosmic-ray electrons is similar to that observed in the local ISM. The overall gamma-ray spectrum of RX J1713–3946 is naturally produced as the sum of leptonic emission from re-accelerated cosmic-ray electrons, and a subdominant hadronic emission from accelerated protons. We also argue that neutrino observations with next-generation detectors might lead to a detection even in the case of a lepto–hadronic origin of the gamma-ray emission.
- Subjects :
- Astrophysics::High Energy Astrophysical Phenomena
Hadron
Cosmic ray
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Electron
GeV
gamma ray: energy spectrum
p: acceleration
01 natural sciences
thermal
cosmic rays
0103 physical sciences
TeV
stars: general
010303 astronomy & astrophysics
Astrophysics::Galaxy Astrophysics
Physics
Range (particle radiation)
lepton hadron
010308 nuclear & particles physics
nucleus
density: low
electron: cosmic radiation
Gamma ray
Compton scattering
Astronomy and Astrophysics
gamma-rays: general
Interstellar medium
gamma ray: emission
Compton scattering: inverse
Space and Planetary Science
High Energy Physics::Experiment
Neutrino
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Subjects
Details
- ISSN :
- 13652966 and 00358711
- Volume :
- 508
- Database :
- OpenAIRE
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Accession number :
- edsair.doi.dedup.....ae6c33a86a88c32a14e7457a1f78b16f
- Full Text :
- https://doi.org/10.1093/mnras/stab2380