Probing LHAASO Galactic PeVatrons through gamma-ray and neutrino correspondence

Abstract

Recently, Large High Altitude Air Shower Observatory (LHAASO) has detected several Galactic point sources of ultra high energy (UHE; $E_{\gamma }>100$ TeV) gamma-rays. These gamma-rays are possibly created in leptonic or hadronic interactions of cosmic rays (CRs) of PeV energies. In the hadronic channel ($p-p$ interaction), the gamma-rays are accompanied by neutrinos. The detection of neutrinos is therefore crucial in understanding CR acceleration in such objects. To estimate the neutrino flux, we adopt the two LHAASO sources (J2226+6057, J1908+0621) found to be spatially associated with the Supernova remnants (SNR G106.3+2.7, SNR G40.5-0.5). For these two sources, the detected TeV-PeV gamma-ray spectra are found to be unusually hard (with spectral index $\sim$ 1.8). We develop a model of gamma-ray and neutrino emission based on the above two prototypes. The neutrino fluxes from these two sources are found to be below the IceCube sensitivity, but are detectable in upcoming IceCube-Gen2 and KM3NeT experiments. We further estimate the neutrino fluxes from similar other 10 LHAASO PeVatron sources and most of them are found to be detectable in IceCube-Gen2 and KM3NeT. Finally, we explore our model parameters, in particular the spectral power law index and estimate the future potential of the neutrino detectors to probe CR acceleration in such Galactic sources.

8 pages, 4 figures

References in corpus (13)

• Detection of the Characteristic Pion-Decay Signature in Supernova Remnants
• Parametrization of gamma-ray production cross-sections for pp interactions in a broad proton energy range from the kinematic threshold to PeV energies
• All-sky search for time-integrated neutrino emission from astrophysical sources with 7 years of IceCube data
• TeV Gamma-Ray Sources from a Survey of the Galactic Plane with Milagro
• Measurement of the cosmic-ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite
• Searching for galactic cosmic ray pevatrons with multi-TeV gamma rays and neutrinos
• Potential PeVatron supernova remnant G106.3+2.7 seen in the highest-energy gamma rays
• The Hunt for Pevatrons: The Case of Supernova Remnants
• Point-source and diffuse high-energy neutrino emission from Type IIn supernovae
• Diffuse neutrinos from extragalactic supernova remnants: Dominating the 100 TeV IceCube flux
• Time Evolution of Gamma Rays from Supernova Remnants
• Multi-band Emission up to PeV Energy from the Crab Nebula in a Spatially Dependent Lepto-hadronic Model
• Ultra-high Energy Gamma-rays from Past Explosions in our Galaxy

Cited by in corpus (1)

• The LHAASO PeVatron bright sky: what we learned