Investigating gamma-ray emission of the Cygnus cocoon with 12 years of Fermi-LAT data

Astiasarain, Xan; Tibaldo, L.; Martin, Pierrick; Knödlseder, J.

doi:10.22323/1.395.0608

Cited by 2 publications

(2 citation statements)

References 22 publications

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“…Here, ǫ = 0.68 is the fraction of observed event counts within the angular resolution of the instrument (He et al 2019). The combined gamma-ray spectra from GeV to highest energies (1.4 PeV) from Cygnus Cocoon as observed by Fermi-LAT (Ackermann et al 2011;Astiasarain et al 2021), ARGO (Bartoli et al 2014), HAWC (Abeysekara et al 2021), and LHAASO (Cao et al 2021;Li 2021) observatories indicate hadronic origin for their generation (Abeysekara et al 2021;Cao et al 2021).…”

Section: Resultsmentioning

confidence: 99%

Probing the origin of cosmic rays in Cygnus Cocoon using ultrahigh-energy gamma-ray and neutrino observations

Banik,

Ghosh

2023

Preprint

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Recent ultrahigh energy gamma-ray observations by the HAWC up to 100 TeV and LHAASO observatories up to 1.4 PeV energies from the direction of Fermi-LAT 4FGL source 4FGL J2028.6+4110e (Cygnus Cocoon), are indicative of a hadronic origin over a leptonic process for their creation. The IceCube Neutrino Observatory has reported IceCube-201120A, a neutrino event coming from the same direction, suggesting that the Cygnus Cocoon may correspond to one of the most plausible sources of high-energy cosmic rays. The apparent relationship of the neutrino event with the observed ultra high energy gamma-rays from Cygnus Cocoon is investigated in this work to study if it can be explained consistently in hadronic interactions of accelerated cosmic rays with ambient matter. Our findings reveal that leptonic mechanisms, together with pure hadronic mechanisms, make a considerable contribution to the understanding of the total electromagnetic spectrum as well as the observed neutrino event. The estimate of expected muon neutrino events from the Cygnus cocoon agrees with the one muon neutrino event detected so far in IceCube multi-year observations. Thus, our results are indicative of the potential of the Cygnus Cocoon to be a galactic cosmic ray source capable of accelerating at least up to PeV energies.

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Section: Resultsmentioning

confidence: 99%

Probing the origin of cosmic rays in Cygnus Cocoon using ultrahigh-energy gamma-ray and neutrino observations

Banik,

Ghosh

2023

Preprint

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“…. The combined gamma-ray spectra from GeV to highest energies (1.4 PeV) from the Cygnus Cocoon as observed by Fermi-LAT(Ackermann et al 2011;Astiasarain et al 2021), ARGO(Bartoli et al 2014), HAWC(Abeysekara et al 2021), and LHAASO(Cao et al 2021;Li 2021) observatories indicate a hadronic origin for their generation(Abeysekara et al 2021;Cao et al 2021). …”

mentioning

confidence: 88%

Probing the Origin of Cosmic Rays in Cygnus Cocoon Using Ultrahigh-energy Gamma-Ray and Neutrino Observations

Banik¹,

Ghosh²

2022

ApJL

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Recent ultrahigh-energy gamma-ray observations by the High Altitude Water Cherenkov Observatory up to 100 TeV and LHAASO observatories up to 1.4 PeV energies from the direction of Fermi Large Area Telescope 4FGL source 4FGL J2028.6 + 4110e (Cygnus Cocoon) are indicative of a hadronic origin over a leptonic process for their creation. The IceCube Neutrino Observatory has reported IceCube-201120A, a neutrino event coming from the same direction, suggesting that the Cygnus Cocoon may correspond to one of the most plausible sources of high-energy cosmic rays. The apparent relationship of the neutrino event with the observed ultrahigh-energy gamma rays from the Cygnus Cocoon is investigated in this work to study if it can be explained consistently in hadronic interactions of accelerated cosmic rays with ambient matter. Our findings reveal that leptonic mechanisms, together with pure hadronic mechanisms, make a considerable contribution to the understanding of the total electromagnetic spectrum as well as the observed neutrino event. The estimate of expected muon neutrino events from the Cygnus Cocoon agrees with the one muon neutrino event detected so far in IceCube multiyear observations. Thus, our results are indicative of the potential of the Cygnus Cocoon to be a Galactic cosmic-ray source capable of accelerating at least up to PeV energies.

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Investigating gamma-ray emission of the Cygnus cocoon with 12 years of Fermi-LAT data

Cited by 2 publications

References 22 publications

Probing the origin of cosmic rays in Cygnus Cocoon using ultrahigh-energy gamma-ray and neutrino observations

Probing the origin of cosmic rays in Cygnus Cocoon using ultrahigh-energy gamma-ray and neutrino observations

Probing the Origin of Cosmic Rays in Cygnus Cocoon Using Ultrahigh-energy Gamma-Ray and Neutrino Observations

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