Multi-frequency study of spectral indices of BL Lacertae objects and flat-spectrum radio quasars

EU Iyida, FC Odo, AE Chukwude, AA Ubachukwu - New Astronomy, 2022 - Elsevier
We present statistical analyses of large homogenous data sample of Fermi-detected blazars
thoroughly studied in order to reassess the relationship between flat-spectrum radio quasars …

Radio core-dominance of Fermi-blazars: implication for blazar unification

EU Iyida, FC Odo, AE Chukwude - Astrophysics and Space Science, 2021 - Springer
In this paper, we use the distributions of two-component radio emissions to investigate the
consequences of relativistic beaming on the unified scheme of blazar populations and radio …

Unified model of blazars and radio galaxies: synthesizing observational data with relativistic beaming theory

EU Iyida, CI Onah, IO Eya, FC Odo - Astrophysics and Space Science, 2024 - Springer
The unified model of jetted active galactic nuclei (AGNs) based on intrinsic properties
presumes that the blazar subtypes of BL Lacertae objects (BLs) and flat-spectrum radio …

Linear size–extended radio luminosity (DP E ) correlation in BL Lacertae objects: evidence for large scale beaming?

FC Odo, AA Ubachukwu - Astrophysics and Space Science, 2013 - Springer
In this paper, we use the distributions of projected linear size (D), core-(PC) and extended-
(PE) radio luminosities, to investigate a consequence of relativistic beaming and radio …

Relativistic beaming effects in BL Lacertae objects: Evidence for RBL/XBL dichotomy

FC Odo, AE Chukwude, AA Ubachukwu - Astrophysics and Space Science, 2017 - Springer
In this paper, we review the predictions of the popular relativistic beaming model for the
unification of radio-and X-ray selected BL Lac (RBL and XBL) populations. Using results of …

On the Extended Blazar Sequence for γ-Ray Emitting Active Galactic Nuclei

AI Audu, FC Odo, AA Ubachukwu - Astrophysics, 2025 - Springer
In this paper, we use the distributions of observed-ray properties, as well as orientation
parameters of a sample of Fermi-LAT AGNs to investigate the hypothesis that-NLS1 objects …

On Asymmetries in Powerful Radio Sources and the Quasar/Galaxy Unification

CI Onah, AA Ubachukwu, FC Odo - Journal of Astrophysics and …, 2014 - Springer
We utilize the distributions of fractional separation difference (x) as asymmetry parameter,
linear size (D) and core-to lobe luminosity ratio (R) as orientation indicators, to investigate a …

On the Unified Scheme of γ-Ray Emitting Jetted Active Galactic Nuclei

AI Audu, FC Odo, EU Iyida, O Okike, AA Ubachukwu - Astrophysics, 2023 - Springer
The discovery of γ-ray emitting Seyfert galaxies has opened a new unified scheme of active
galactic nuclei (AGN) in which jetted Seyfert galaxies are viewed as young counterparts of …

Extended radio emission in core-dominated quasars: implications for relativistic beaming hypothesis

FC Odo, AA Ubachukwu, AE Chukwude - Astrophysics and Space Science, 2015 - Springer
This paper investigates a simple consequence of relativistic beaming and radio source
orientation scenario for high-luminosity extragalactic radio sources, based on the …

Investigating possible unification of Seyfert galaxies and blazars in Fermi‐Large Area Telescope sample

EU Iyida, IO Eya, FC Odo - Astronomische Nachrichten, 2021 - Wiley Online Library
Statistical analyses are invaluable methods used to understand intrinsic emission processes
and the unification of extragalactic radio sources. In this paper, we collected radio, X‐ray …