Growing evidence for high-energy neutrinos originating in radio blazars

Abstract

Evidence for bright radio blazars being high-energy neutrino sources was found in recent years. However, specifics of how and where these particles get produced still need to be determined. In this paper, we add 14 new IceCube events from 2020-2022 to update our analysis of the neutrino-blazars connection. We test and refine earlier findings by utilising the total of 71 track-like high-energy IceCube events from 2009-2022. We correlate them with the complete sample of 3412 extragalactic radio sources selected by their compact radio emission. We demonstrate that neutrinos are statistically associated with radio-bright blazars with a post-trial p-value of 3*10^-4. In addition to this statistical study, we confirm previous individual neutrino-blazar associations, find and discuss several new ones. Notably, PKS 1741-038 was selected earlier and had a second neutrino detected from its direction in 2022; PKS 0735+168 has experienced a major flare across the whole electromagnetic spectrum coincidently with a neutrino arrival from that direction in 2021.

arXiv comment10 pages, 5 figures, 2 machine-readable tables; V2: minor changes and updates, accepted by MNRAS

References in corpus (49)

• Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
• Multi-messenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A
• Neutrino emission from the direction of the blazar TXS 0506+056 prior to the IceCube-170922A alert
• Relativistic Jets in Active Galactic Nuclei
• Evidence for neutrino emission from the nearby active galaxy NGC 1068
• The IceCube high-energy starting event sample: Description and flux characterization with 7.5 years of data
• The VLBA Calibrator Survey - VCS1
• MOJAVE: XV. VLBA 15 GHz Total Intensity and Polarization Maps of 437 Parsec-Scale AGN Jets From 1996-2017
• Improved Characterization of the Astrophysical Muon-Neutrino Flux with 9.5 Years of IceCube Data
• MOJAVE - XIV. Shapes and opening angles of AGN jets
• The Third VLBA Calibrator Survey
• The Sixth VLBA Calibrator Survey: VCS6
• The Fifth VLBA Calibrator Survey: VCS5
• Observational evidence for the origin of high-energy neutrinos in parsec-scale nuclei of radio-bright active galaxies
• The Fourth VLBA Calibrator Survey - VCS4
• Sensitivity of the KM3NeT/ARCA neutrino telescope to point-like neutrino sources
• Single-epoch VLBI imaging study of bright active galactic nuclei at 2 and 8 GHz
• Survey of Instantaneous 1-22 GHz Spectra of 550 Compact Extragalactic Objects with Declinations from -30deg to +43deg
• Dissecting the regions around IceCube high-energy neutrinos: growing evidence for the blazar connection
• MOJAVE: XVIII. Kinematics and Inner Jet Evolution of Bright Radio-Loud Active Galaxies
• The VLBA Galactic Plane Survey -- VGaPS
• Precise geodesy with the Very Long Baseline Array
• Directional association of TeV to PeV astrophysical neutrinos with radio blazars
• MOJAVE XIX: Brightness Temperatures and Intrinsic Properties of Blazar Jets
• Multi-Epoch Modeling of TXS 0506+056 and Implications for Long-Term High-Energy Neutrino Emission
• Search for Sources of Astrophysical Neutrinos Using Seven Years of IceCube Cascade Events
• Relativistic Jets in the Radio Reference Frame Image Database II: Blazar Jet Accelerations from the First 10 Years of Data (1994 - 2003)
• A multi-messenger study of the blazar PKS 0735+178: a new major neutrino source candidate
• Association of IceCube neutrinos with radio sources observed at Owens Valley and Metsähovi Radio Observatories
• Beginning a journey across the universe: the discovery of extragalactic neutrino factories
• Multi-wavelength and neutrino emission from blazar PKS 1502+106
• Which blazars are neutrino loud?
• Search for High-Energy Neutrino Emission from Radio-Bright AGN
• The wide-field VLBA calibrator survey -- WFCS
• The LBA Calibrator Survey of southern compact extragalactic radio sources - LCS1
• New Associations of Gamma-Ray Sources from the Fermi Second Source Catalog
• Constraints on the models of the origin of high-energy astrophysical neutrinos
• The catalogue of positions of optically bright extragalactic radio sources OBRS-2
• Apparent superluminal core expansion and limb brightening in the candidate neutrino blazar TXS 0506+056
• The catalogue of positions of optically bright extragalactic radio sources OBRS-1
• Galactic contribution to the high-energy neutrino flux found in track-like IceCube events
• The Second LBA Calibrator Survey of southern compact extragalactic radio sources - LCS2
• A multiwavelength view of BL Lacs neutrino candidates
• The EVN Galactic Plane Survey - EGaPS
• VLBI ecliptic plane survey: VEPS-1
• Multiwavelength search for the origin of IceCube's neutrinos
• The hunt for extraterrestrial high-energy neutrino counterparts
• Radio astronomy locates the neutrino origin in bright blazars
• Observing the inner parsec-scale region of candidate neutrino-emitting blazars

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• Key Science Goals for the Next-Generation Event Horizon Telescope
• The Radio Fundamental Catalogue. I. Astrometry
• High-energy neutrino-induced cascade from the direction of the flaring radio blazar TXS 0506+056 observed by Baikal-GVD in 2021
• Search for directional associations between Baikal Gigaton Volume Detector neutrino-induced cascades and high-energy astrophysical sources
• Searches for neutrinos in the direction of radio-bright blazars with the ANTARES telescope
• Neutrino flares of radio blazars observed from TeV to PeV
• The variability of blazars throughout the electromagnetic spectrum
• Association of the IceCube neutrinos with blazars in the CGRaBS sample
• The origin of high-energy astrophysical neutrinos: new results and prospects
• Repeated patterns of gamma-ray flares suggest structured jets of blazars as likely neutrino sources
• Repeated pattern of $\gamma$-ray flares in the blazar PKS 1502+106 coincident with the IC190730A neutrino event
• Multi-epoch leptohadronic modeling of neutrino source candidate blazar PKS 0735+178
• $Fermi$-LAT follow-up observations in seven years of real-time high-energy neutrino alerts
• Neutrino production in blazar radio cores
• Probing neutrino production in blazars by millimeter VLBI
• Hard X-ray emission from blazars associated with high-energy neutrinos
• Bounds on neutrino-DM interactions from TXS 0506+056 neutrino outburst
• Distinguishing radiation mechanisms and particle populations in blazar jets through long-term multi-band monitoring with RINGO3 and Fermi
• Extreme Jet Beaming Observed in Neutrino-Associated Blazars
• VLBI Analysis of a Potential High-Energy Neutrino Emitter Blazar
• The dynamics of the parsec-scale jet in the neutrino blazar PKS 0735+178
• First Search for High-Energy Neutrino Emission from Galaxy Mergers
• Flat Spectrum Radio Quasars as high-energy neutrino sources
• Investigating the correlations between IceCube high-energy neutrinos and Fermi-LAT $\gamma$-ray observations. II
• Zooming into the neutrino-associated blazar candidate J1718+4239
• An isotropic full-sky sample of optically selected blazars
• The physical properties of candidate neutrino-emitter blazars
• Optimizing the hunt for extraterrestrial high-energy neutrino counterparts
• Impact of multi-messenger spectral modelling on blazar-neutrino associations
• Rapid jet ejection from PKS 0215+015 coincident with a high-energy neutrino event
• Hadronic origin of gamma rays and neutrinos from blazars: Multi-messenger implications and observational constraints
• Identifying multiplets of IceCube alert events
• Neutrino Astronomy at High Energies - An Experimental Review