English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Blazars constitute the vast majority of extragalactic $\gamma$-ray sources.They can also contribute a sizable fraction of the diffuse astrophysicalneutrinos detected by IceCube. In the past few years, the real-time alertsystem of IceCube has led to multiwavelength follow-up of very high-energyneutrino events of plausible astrophysical origin. Spatial and temporalcoincidences of these neutrino events with the high-activity state of$\gamma$-ray blazars can provide a unique opportunity to decipher cosmic-rayinteractions in the relativistic jets. Assuming that blazars accelerate cosmicrays up to ultrahigh energies ($E>10^{17}$ eV), we calculate the "guaranteed"contribution to the line-of-sight cosmogenic $\gamma$-ray and neutrino fluxesfrom four blazars associated with IceCube neutrino events. Detection of thesefluxes by upcoming $\gamma$-ray imaging telescopes like CTA and/or by plannedneutrino detectors like IceCube-Gen2 may lead to the first direct signature(s)of ultrahigh-energy cosmic-ray (UHECR) sources. We find that detection of thecosmogenic neutrino fluxes from the blazars TXS~0506+056, PKS~1502+106 andGB6~J1040+0617 would require UHECR luminosity $\gtrsim 10$ times the inferredneutrino luminosity from the associated IceCube events. Blazars TXS~0506+056,3HSP~J095507.9+355101 and GB6~J1040+0617 can be detected by CTA if the UHECRluminosity is $\gtrsim 10$ times the neutrino luminosity inferred from theassociated IceCube events. Given their relatively low redshifts and hence totalenergetics, TXS~0506+056 and 3HSP~J095507.9+355101 should be the prime targetsfor upcoming large neutrino and $\gamma$-ray telescopes.

Cosmogenic gamma-ray and neutrino fluxes from blazars associated with IceCube events