Radio core-dominance of Fermi-blazars: implication for blazar unification [PDF]
Astrophysics and Space Science, 2021 ...The distribution of radio core-dominance is consistent with average projection angles of 13.5, 14.8, 16.8, 20.4, and 28.2 for ISPs, LSPs, FSRQs, HSPs, and radio galaxies, respectively. Linear regression analyses of our data yield significant anti-correlation r greater than 0.60 between core-dominance parameter and extended luminosity in each ...
E. U. Iyida, F. C. Odo, A. E. Chukwude
openaire +2 more sources
Exploring TeV Candidates of Fermi Blazars through Machine Learning
The Astrophysical Journal, 2023 In this work, we make use of a supervised machine-learning algorithm based on Logistic Regression (LR) to select TeV blazar candidates from the 4FGL-DR2/4LAC-DR2, 3FHL, 3HSP, and 2BIGB catalogs.
J. T. Zhu +5 more
doaj +1 more source
Probing Neutrino Production in Blazars by Millimeter VLBI
Galaxies, 2023 The advancement of neutrino observatories has sparked a surge in multi-messenger astronomy. Multiple neutrino associations among blazars are reported while neutrino production sites are located within their central (sub)parsecs.
Yuri Y. Kovalev +3 more
doaj +1 more source
Searches for IceCube neutrinos from blazar flares using correlations with gamma-ray lightcurves [PDF]
EPJ Web of Conferences, 2019 Blazars have long been considered as accelerator candidates for cosmic rays. In such a scenario, hadronic interactions in the jet would produce neutrinos and gamma rays.
Raab Christoph +1 more
doaj +1 more source
From the ‘blazar sequence' to unification of blazars and radio galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 7 pages, 2 table, 5 figures, accepted for publication in ...
Xiong, Dingrong +3 more
openaire +2 more sources
Boosted dark matter versus dark matter-induced neutrinos from single and stacked blazars [PDF]
Journal of High Energy PhysicsThe physics responsible for the production of observed high-energy neutrinos have not been established so far, neither for the diffuse astrophysical ones nor for those detected from single blazars.
Andrea Giovanni De Marchi +3 more
semanticscholar +1 more source
Patterns in the Multiwavelength Behavior of Candidate Neutrino Blazars [PDF]
Astrophysical Journal, 2020 Motivated by the identification of the blazar TXS 0506+056 as the first promising high-energy neutrino counterpart candidate, we search for additional neutrino blazar candidates among the Fermi–Large Area Telescope detected blazars.
A. Franckowiak +10 more
semanticscholar +1 more source
Kinematics of Parsec-scale Jets of Gamma-Ray Blazars at 43 GHz within the VLBA-BU-BLAZAR Program [PDF]
, 2017 We analyze the parsec-scale jet kinematics from 2007 June to 2013 January of a sample of γ-ray bright blazars monitored roughly monthly with the Very Long Baseline Array at 43 GHz.
S. Jorstad +12 more
semanticscholar +1 more source
MOJAVE. XVII. Jet Kinematics and Parent Population Properties of Relativistically Beamed Radio-loud Blazars [PDF]
Astrophysical Journal, 2019 We present results from a parsec-scale jet kinematics study of 409 bright radio-loud active galactic nuclei (AGNs) based on 15 GHz Very Long Baseline Array (VLBA) data obtained between 1994 August 31 and 2016 December 26 as part of the 2 cm VLBA survey ...
M. Lister +12 more
semanticscholar +1 more source
Cosmic Neutrinos from Temporarily Gamma-suppressed Blazars
Astrophysical Journal Letters, 2021 Despite the uncovered association of a high-energy neutrino with the apparent flaring state of blazar TXS 0506+056 in 2017, the mechanisms leading to astrophysical particle acceleration and neutrino production are still uncertain.
E. Kun +5 more
semanticscholar +1 more source