The study of blazar jet has been performed for several decades via VLBI technique, while its
generation and propagation stay unclear. In the present work, we compiled a sample of 407 …

Blazars are a subclass of active galactic nuclei with extreme observation properties, which is
caused by the beaming effect, expressed by a Doppler factor (), in a relativistic jet. Doppler …

Our knowledge of Giga-electron volt (GeV) radio galaxies has been revolutionized by the
Fermi-LAT Telescope, which provides an excellent opportunity to study the physical …

In this work, we present 8523 pairs of R-band optical photometry observations for the quasar
3C 454.3 made during the period of 2006 October–2018 February on the 70 cm meniscus …

The extragalactic radio sources are divided into two subclasses (radio-loud and radio-quiet
sources) in the literature using radio loudness (R), which is defined as the ratio of radio …

The spectacular observational phenomena lying in blazars can be well explained and
described by the relativistic beaming effect that the emission in the jet is highly boosted …

A two-component model of radio emission has been used to explain some radio
observational properties of Active Galactic Nuclei (AGNs) and, in particular, of blazars. In this …

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 …

Blazars show extreme observational properties that are due to the beaming effect with the jet
being close to the line of sight. It was found that the observed luminosity is anticorrelated …

For blazars, its radio emissions are composed of two components. In the high energy bands,
Tera-electronvolts (TeV; 10 12 electronvolts) emissions were detected from some blazars …