We review current understanding of the population of radio galaxies and radio-loud quasars
from an observational perspective, focusing on their large-scale structures and dynamics …

BL Lac objects are active nuclei, hosted in massive elliptical galaxies, the emission of which
is dominated by a relativistic jet closely aligned with the line of sight. This implies the …

The jets of powerful blazars propagate within relatively dense regions of radiation produced
externally to the jet. This radiation is a key ingredient to understand the origin of the high …

Gamma ray astronomy, the branch of high energy astrophysics that studies the sky in
energetic γ-ray photons, is destined to play a crucial role in the exploration of nonthermal …

We estimate the power of relativistic, extragalactic jets by modelling the spectral energy
distribution of a large number of blazars. We adopt a simple one-zone, homogeneous …

We treat the production of neutrons, photons, and neutrinos through photomeson
interactions of relativistic protons with ambient photons in the compact inner jets of blazars …

We present multiwavelength data for 12 blazars observed from 2008 to 2010 as part of an
ongoing optical–infrared photometric monitoring project. Sources were selected to be bright …

We extend a method for modeling synchrotron and synchrotron self-Compton radiations in
blazar jets to include external Compton (EC) processes. The basic model assumption is that …

We examine a systematic comparison of jet knots, hot spots, and radio lobes recently
observed with Chandra and ASCA. This report discusses the origin of their X-ray emissions …

ABSTRACT BL Lac objects are the best candidates to study the jet properties since their
spectral energy distributions (SEDs) are less contaminated by the emission from the …