Search for Neutrino Emission from the Cygnus Bubble Based on LHAASO Γ-Ray Observations

Wenlian Li,Tian-Qi Huang,Donglian Xu,Huihai He

The Astrophysical Journal（2024）

Cited 0|Views11

Abstract

The Cygnus region, which contains massive molecular and atomic clouds and young stars, is a promising Galactic neutrino source candidate. Cosmic-ray transport in the region can produce neutrinos and γ -rays. Recently, the Large High Altitude Air Shower Observatory (LHAASO) detected an ultrahigh-energy γ -ray bubble (Cygnus Bubble) in this region. Using publicly available track events detected by the IceCube Neutrino Observatory in 7 yr of full detector operation, we conduct searches for correlated neutrino signals from the Cygnus Bubble with neutrino emission templates based on LHAASO γ -ray observations. No significant signals were found for any employed templates. With the 7 TeV γ -ray flux template, we set a flux upper limit of 90% confidence level for the neutrino emission from the Cygnus Bubble to be 5.7 × 10 ^−13 TeV ^−1 cm ^−2 s ^−1 at 5 TeV.

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Key words

Neutrino astronomy,Gamma-ray astronomy,Galactic cosmic rays

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