PT Journal
AU HAWC Collaboration (Albert, Aea
   Salesa Greus, F
TI HAWC J2227+610 and Its Association with G106.3+2.7, a New Potential Galactic PeVatron
SO Astrophysical Journal Letters
JI Astrophys. J. Lett.
PY 2020
BP L29 - 9pp
VL 896
IS 2
DI 10.3847/2041-8213/ab96cc
LA English
DE Gamma-ray astronomy; Gamma-ray sources; Gamma-rays; Cosmic ray sources; Supernova remnants; Gamma-ray observatories
AB We present the detection of very-high-energy gamma-ray emission above 100 TeV from HAWC J2227+610 with the High-Altitude Water Cherenov Gamma-Ray Observatory (HAWC) observatory. Combining our observations with previously published results by the Very Energetic Radiation Imaging Telescope Array System (VERTIAS), 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.
ER