HAWC J2227+610 and its association with G106.3+2.7, a new potential Galactic PeVatron

Abstract

We present the detection of VHE gamma-ray emission above 100 TeV from HAWC J2227+610 with the HAWC observatory. Combining our observations with previously published results by VERITAS, we interpret the gamma-ray emission from HAWC J2227+610 as emission from protons with a lower limit in their cutoff energy of 800 TeV. The most likely source of the protons is the associated supernova remnant G106.3+2.7, making it a good candidate for a Galactic PeVatron. However, a purely leptonic origin of the observed emission cannot be excluded at this time.

Accepted for publication by ApJL

References in corpus (4)

• Detection of the Characteristic Pion-Decay Signature in Supernova Remnants
• TeV Gamma-Ray Sources from a Survey of the Galactic Plane with Milagro
• Milagro Observations of Multi-TeV Emission from Galactic Sources in the Fermi Bright Source List
• New long-term braking index measurements for glitching pulsars using a glitch-template method

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