SNR G54.1+0.3, a PeVatron candidate unveiled by LHAASO

Abstract

Recently, the LHAASO Collaboration reported the first very-high-energy gamma-ray catalog, containing 90 TeV sources. Among these sources, 1LHAASO J1929+1846u is located 0.3${}^{\circ }$ west of SNR G54.1+0.3 and also lies within a $+53{\text{km s}}^{-1}$ cloud (the Western Cloud). Moreover, one of the IceCube track-type high-energy starting events is found around 1.3${}^{\circ }$ north of 1LHAASO J1929+1846u, which may serve as strong evidence for the hadronic origin of this TeV source. SNR G54.1+0.3 is a young supernova remnant (SNR), with a powerful pulsar wind nebula (PWN) inside. Its X-ray radiation from the PWN and the SNR Shell can be clearly identified. The radio emission from the PWN region is also given. However, given the angular resolution of gamma-ray experiments, the entire SNR region is viewed as a point source by Fermi-LAT, H.E.S.S. and VERITAS. In this work, we explore a hybrid scenario where SNR G54.1+0.3 is indeed associated with the Western Cloud, and we derive the multi-wavelength emissions from the PWN, the SNR Shell, and the Western Cloud, separately. Our model can explain the observations well, indicating that SNR G54.1+0.3 might be an excellent candidate of Galactic PeVatron and neutrino source.

14 pages, 7 figures, accepted by APJ

References in corpus (15)

• Trigonometric Parallaxes Of High-Mass Star Forming Regions: Our View Of The Milky Way
• Evidence for neutrino emission from the nearby active galaxy NGC 1068
• Observation of high-energy neutrinos from the Galactic plane
• Energy spectra of gamma-rays, electrons and neutrinos produced at interactions of relativistic protons with low energy radiation
• The First LHAASO Catalog of Gamma-Ray Sources
• The Pacific Ocean Neutrino Experiment
• Diffusive Shock Acceleration with Magnetic Amplification by Non-resonant Streaming Instability in SNRs
• Potential PeVatron supernova remnant G106.3+2.7 seen in the highest-energy gamma rays
• A Massive Shell of Supernova-formed Dust in SNR G54.1+0.3
• Distance Determination to the Crab-like PWN G54.1+0.3 and Search for its Supernova Remnant Shell
• Where are Milky Way's Hadronic PeVatrons?
• Is Supernova Remnant Cassiopeia A a PeVatron?
• Galactic center gamma-ray production by cosmic rays from stellar winds and Sgr A East
• Probing LHAASO Galactic PeVatrons through gamma-ray and neutrino correspondence
• Search for joint multimessenger signals from potential galactic cosmic-ray accelerators with HAWC and IceCube

Cited by in corpus (1)

• Fermi-LAT View on Three Ultra-high-energy 1LHAASO Sources in the $52^{\circ }<l<55^{\circ }$ Region