Results 101 to 110 of about 5,357 (210)

A Simulation Study of Low-power Relativistic Jets: Flow Dynamics and Radio Morphology of FR-I Jets

The Astrophysical Journal
Radio galaxies are classified into two primary categories based on their morphology: center-brightened FR-I and edge-brightened FR-II. It is believed that the jet power and interactions with the ambient medium govern the deceleration and decollimation of
Ayan Bhattacharjee, Jeongbhin Seo, Dongsu Ryu, Hyesung Kang   +3 more
doaj   +1 more source

Two-component jets from 3-dimensional magnetohydrodynamic jet simulations of disk winds at sub-parsec scales

EPJ Web of Conferences, 2013
We explore the effect of large scale magnetic field on the formation of two-component jets in magnetohydrodynamic disk winds simulations. Our simulations show a one-component and two-component jets develop depending on the magnetic field distribution ...
Staff Jan, Koning Nico, Ouyed Rachid, Pudritz Ralph   +3 more
doaj   +1 more source

A Study of Particle Acceleration in Blazar Jets

The Astrophysical Journal
The particle acceleration of blazar jets is crucial to high-energy astrophysics, yet the acceleration mechanism division in blazar subclasses and the underlying nature of these mechanisms remain elusive. In this work, we utilized the synchrotron spectral
Hubing Xiao, Wenxin Yang, Yutao Zhang, Shaohua Zhang, Junhui Fan, Liping Fu, Jianghe Yang   +6 more
doaj   +1 more source

PKS J0805-0111: A Second Owens Valley Radio Observatory Blazar Showing Highly Significant Sinusoidal Radio Variability—The Tip of the Iceberg

The Astrophysical Journal
Owens Valley Radio Observatory observations of the supermassive black hole binary (SMBHB) candidate PKS 2131−021 revealed, for the first time, six likely characteristics of the phenomenology exhibited by SMBHBs in blazars, of which the most unexpected ...
P. V. de la Parra, S. Kiehlmann, P. Mróz, A. C. S. Readhead, A. Synani, M. C. Begelman, R. D. Blandford, Y. Ding, F. Harrison, I. Liodakis, W. Max-Moerbeck, V. Pavlidou, R. Reeves, M. Vallisneri, M. F. Aller, M. J. Graham, T. Hovatta, C. R. Lawrence, T. J. W. Lazio, A. A. Mahabal, B. Molina, S. O’Neill, T. J. Pearson, V. Ravi, K. Tassis, J. A. Zensus   +25 more
doaj   +1 more source

Causality and Communication: Relativistic astrophysical jets and the implementation of science communication training in astronomy classes

, 2014
Part I: Relativistic jets emitted from the centers of some galaxies (called active galaxies) exhibit many interesting behaviors that are not yet fully understood: acceleration and collimation over vast distances, for instance, and occasional flaring ...
Kohler, Susanna
core  

Particles in Relativistic Magnetohydrodynamic Jets. II. Bridging Jet Dynamics with Multi–wave band Nonthermal Emission Signatures

The Astrophysical Journal
Relativistic magnetized jets, originating near black holes, are observed to exhibit substructured flows. In this study, we present synthetic synchrotron-emission signatures for different lines of sight and frequencies, derived from three-dimensional ...
Ravi Pratap Dubey, Christian Fendt, Bhargav Vaidya   +2 more
doaj   +1 more source

Monitoring of multi-frequency polarization of gamma-ray bright AGNs

EPJ Web of Conferences, 2013
We started two observing programs with the Korean VLBI Network (KVN) monitoring changes in the flux density and polarization of relativistic jets in gamma-ray bright AGNs simultaneously at 22, 43, 86, 129 GHz.
Lee Sang-Sung, Han Myounghee, Kang Sincheol, Seen Jungmin, Byun Do-Young, Baek Jun-Hyun, Kim Soon-Wook, Kim Jeong-Sook   +7 more
doaj   +1 more source

A simulation study of ultra-relativistic jets

, 2020
We present the early results of simulations of ultra-relativistic jets using a newly developed code for relativistic hydrodynamics. The code is based on the high-order WENO-Z scheme and employs a realistic equation of state.
Kang, Hyesung, Seo, Jeongbhin, Ryu, Dongsu   +2 more
core  

Studies of relativistic jets in active galactic nuclei with SKA

, 2015
Relativistic jets in active galactic nuclei (AGN) are among the most powerful astrophysical objects discovered to date. Indeed, jetted AGN studies have been considered a prominent science case for SKA, and were included in several different chapters of ...
Paragi, Zsolt, Agudo, Iván, Ghisellini, Gabriele, Gabriele Giovannini, Eileen Meyer, Zsolt Paragi, Gómez, Jose L., Giovannini, Gabriele, Falcke, Heino, Lister, Matthew, Perucho, Manel, Gabriele Ghisellini, Meyer, Eileen T, Laing, Robert, Ivan Agudo, Robert Laing, Dominik Schleicher, Mizuno, Yosuke, Manel Perucho, O'Sullivan, Shane, Padovani, Paolo, Matt L. Lister, Yosuke Mizuno, Georganopoulos, Markos, Boettcher, Markus, Leonid Gurvits, Lukasz Stawarz, Shane O'Sullivan, Stawarz, Łukasz, Heino Falcke, John Wardle, Marcello Giroletti, Schleicher, Dominik, Gurvits, Leonid, José L. Gómez, José-María Martí, Paolo Padovani, Giroletti, Marcello, Martí, Jose-María, Wardle, John, Nektarios Vlahakis, Vlahakis, Nektarios, Markos Georganopoulos, Markus Böttcher   +43 more
core   +1 more source

Multimessenger Emission Derived from Relativistic Magnetized Jet Dynamics Using a Multizone Framework

The Astrophysical Journal
Relativistic jets from active galactic nuclei (AGN) are highly energetic and emit radiation across a wide range of frequencies. Despite several observational studies, their particle composition still remains a key open question.
Harshita Bhuyan, Bhargav Vaidya, Christian Fendt, Aditya Sharma   +3 more
doaj   +1 more source