The physical properties of candidate neutrino-emitter blazars

Abstract

The processes governing the production of astrophysical high-energy neutrinos are still debated, and the sources originating them remain an open question. Among the putative emitters, active galactic nuclei have gained increasing attention. Blazars, in particular, stand out due to their ability to accelerate particles in environments with external radiation fields. Recent observations suggest they may contribute to the neutrino flux detected by IceCube. We study the physical properties of a subsample of 52 blazars proposed as candidate neutrino emitters, based on a positional cross-correlation analysis between IceCube hotspots and the 5BZCat catalog. We aim to provide a first characterization of their central engines and physical nature, to explore the potential link with neutrino production. We analyze the optical spectroscopic properties of the 52 candidate neutrino-emitter blazars to infer their accretion regime. The study is complemented by radio and $\gamma$-ray data, which trace the intrinsic jet power. We compare the sample to other blazar populations in the literature, perform statistical tests, and explore, through simulations, the applicability of methods that include censored data. Overall, the target sample shows properties compatible with the reference samples. We observe a mild tendency to prefer objects with intense radiation fields, typical of radiatively efficient accretors, and high radio power. Among them, 24 are detected by Fermi-LAT, spanning various $\gamma$-ray luminosities. We also show that statistical tests commonly used in the literature need to be handled with caution, as they are sensitive to the number of censored data and the sample size.

arXiv comment22 pages, 8 figures, published in Astronomy & Astrophysics

References in corpus (105)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
• A Catalog of Quasar Properties from SDSS DR7
• The Sixth Data Release of the Sloan Digital Sky Survey
• The Sixteenth Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra
• Fermi Large Area Telescope Second Source Catalog
• Determining Central Black Hole Masses in Distant Active Galaxies and Quasars. II. Improved Optical and UV Scaling Relationships
• A Unifying View of the Spectral Energy Distributions of Blazars
• The Co-Evolution of Galaxies and Supermassive Black Holes: Insights from Surveys of the Contemporary Universe
• X-shooter, the new wide band intermediate resolution spectrograph at the ESO Very Large Telescope
• Multi-messenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A
• The 6dF Galaxy Survey: Final Redshift Release (DR3) and Southern Large-Scale Structures
• Molecfit: A general tool for telluric absorption correction. I. Method and application to ESO instruments
• Leptonic and Hadronic Modeling of Fermi-Detected Blazars
• Automated data reduction workflows for astronomy
• On the fundamental dichotomy in the local radio-AGN population: accretion, evolution, and host galaxy properties
• The 2dF QSO Redshift Survey - XII. The spectroscopic catalogue and luminosity function
• General physical properties of bright Fermi blazars
• BL Lac Objects in the Synchrotron Proton Blazar Model
• The 6dF Galaxy Survey: Samples, Observational Techniques and the First Data Release
• Observation and Characterization of a Cosmic Muon Neutrino Flux from the Northern Hemisphere using six years of IceCube data
• Fermi Large Area Telescope Bright Gamma-ray Source List
• Molecfit: A general tool for telluric absorption correction II. Quantitative evaluation on ESO-VLT X-Shooter spectra
• Evidence for neutrino emission from the nearby active galaxy NGC 1068
• CRATES: An All-Sky Survey of Flat-Spectrum Radio Sources
• The power of relativistic jets is larger than the luminosity of their accretion disks
• Time-integrated Neutrino Source Searches with 10 years of IceCube Data
• The First Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
• Mass Functions of the Active Black Holes in Distant Quasars from the Large Bright Quasar Survey, the Bright Quasar Survey, and the Color-Selected Sample of the SDSS Fall Equatorial Stripe
• The transition between BL Lac objects and Flat Spectrum Radio Quasars
• BAT AGN Spectroscopic Survey I: Spectral Measurements, Derived Quantities, and AGN Demographics
• All-sky search for time-integrated neutrino emission from astrophysical sources with 7 years of IceCube data
• A simplified view of blazars: clearing the fog around long-standing selection effects
• The blazar sequence: a new perspective
• The Fermi blazar sequence
• Comparing Single-Epoch Virial Black Hole Mass Estimators for Luminous Quasars
• CGRaBS: An All-Sky Survey of Gamma-Ray Blazar Candidates
• The contribution of Fermi-2LAC blazars to the diffuse TeV-PeV neutrino flux
• Jets and accretion processes in Active Galactic Nuclei: further clues
• The Fermi blazars divide
• Spectroscopy of The Largest Ever Gamma-ray Selected BL Lac Sample
• The Jet-Disk Connection and Blazar Unification
• Spectroscopy of Broad Line Blazars from 1LAC
• The dividing line between FR I and FR II radio--galaxies
• The Black Hole Mass - Spheroid Luminosity relation
• The Spectral Energy Distributions of Fermi Blazars
• TXS 0506+056, the first cosmic neutrino source, is not a BL Lac
• The Parkes Half-Jansky Flat-Spectrum Sample
• Identification of the infrared non-thermal emission in Blazars
• The redshift of the BL Lac object TXS 0506+056
• The relation between broad lines and gamma--ray luminosities in Fermi blazars
• Extreme blazars as counterparts of IceCube astrophysical neutrinos
• Observational evidence for the origin of high-energy neutrinos in parsec-scale nuclei of radio-bright active galaxies
• An X-ray survey of the 2Jy sample. I: is there an accretion mode dichotomy in radio-loud AGN?
• The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope -- Data Release 3
• The Properties of the X-Ray-Selected EMSS Sample of BL Lac Objects
• A simplified view of blazars: the gamma-ray case
• Directional association of TeV to PeV astrophysical neutrinos with radio blazars
• The Central Engines of Fermi Blazars
• MOJAVE XIX: Brightness Temperatures and Intrinsic Properties of Blazar Jets
• Correlation between radio and broad-line emissions in radio-loud quasars
• On the redshift of TeV BL Lac objects
• The jet-disc connection in AGN
• General Physical Properties of CGRaBS Blazars
• On the geometry of broad emission region in quasars
• Leptonic and Hadronic Radiative Processes in Supermassive-Black-Hole Jets
• Association of IceCube neutrinos with radio sources observed at Owens Valley and Metsähovi Radio Observatories
• Geometry and inclination of the broad line region in blazars
• AGN-driven outflows and the AGN feedback efficiency in young radio galaxies
• Beginning a journey across the universe: the discovery of extragalactic neutrino factories
• The environments of luminous radio galaxies and type-2 quasars
• Search for High-Energy Neutrino Emission from Radio-Bright AGN
• High redshift Fermi blazars
• SPIDERS: Selection of spectroscopic targets using AGN candidates detected in all-sky X-ray surveys
• The discovery of high power - high synchrotron peak blazars
• The Sedentary Survey of Extreme High Energy Peaked BL Lacs III. Results from Optical Spectroscopy
• Optical spectroscopic observations of gamma-ray blazar candidates II. The 2013 KPNO campaign in the Northern Hemisphere
• Growing evidence for high-energy neutrinos originating in radio blazars
• Blue Fermi Flat Spectrum Radio Quasars
• The Accretion Rates and Spectral Energy Distributions of BL Lacertae Objects
• Star formation in high-redshift quasars: excess [O II] emission in the radio-loud population
• A near-IR study of the host galaxies of 2Jy radio sources at 0.03 < z < 0.5: I - the data
• The ROSAT BRIGHT survey: I. Identification of an AGN sample with hard ROSAT X-ray spectra
• The Nature of Transition Blazars
• The connection between black hole mass and Doppler boosted emission in BL Lacertae type objects
• White dwarf-main sequence binaries from LAMOST: the DR1 catalogue
• Optical spectroscopy of BL Lac objects: TeV candidates
• Basic properties of Fermi blazars and the "blazar sequence"
• An optical overview of blazars with LAMOST I: Hunting changing-look blazars and new redshift estimates
• The Spectra of IceCube Neutrino (SIN) candidate sources -- II. Source Characterisation
• The Powers of Relativistic Jets depend on the Spin of Accreting Supermassive Black Hole
• PKS 1424+240: yet another masquerading BL Lac object as a possible IceCube neutrino source
• Dynamical Black Hole Masses of BL Lac Objects from the Sloan Digital Sky Survey
• Fermi-LAT counterparts of IceCube neutrinos above 100 TeV
• Multiwavelength search for the origin of IceCube's neutrinos
• The long-term centimeter variability of active galactic nuclei: A new relation between variability timescale and accretion rate
• An extensive study of blazar broad emission line: Changing-look blazars and Baldwin effect
• Calibrating Emission Lines as Quasar Bolometers
• High-energy neutrinos from X-rays flares of blazars frequently observed by the Swift X-Ray Telescope
• High-redshift quasars along the Main Sequence
• The spectra of IceCube Neutrino (SIN) candidate sources -- III. Optical spectroscopy and source characterization of the full sample
• ZBLLAC -- A spectroscopic database of BL Lacertae objects
• Association of the IceCube neutrinos with blazars in the CGRaBS sample
• Probing neutrino production in blazars by millimeter VLBI
• X-ray Spectral Variability as Probe of Multimessenger Emission in Blazar 5BZB J0630-24064