Results 1 to 10 of about 686,828 (173)
PIC methods in astrophysics: simulations of relativistic jets and kinetic physics in astrophysical systems. [PDF]
Living Rev Comput Astrophys, 2021 The Particle-In-Cell (PIC) method has been developed by Oscar Buneman, Charles Birdsall, Roger W. Hockney, and John Dawson in the 1950s and, with the advances of computing power, has been further developed for several fields such as astrophysical ...
Nishikawa K +3 more
europepmc +3 more sources
Influence of the jet opening angle on the derived kinematical parameters of blazar jets having uniform and stratified bulk motion [PDF]
Mon.Not.Roy.Astron.Soc.377:446-452,2007, 2007 We present analytical modelling of conical relativistic jets, in order to evaluate the role of the jet opening angle on certain key parameters that are inferred from VLBI radio observations of blazar nuclear jets. The key parameters evaluated are the orientation angle (i.e., the viewing angle) of the jet and the apparent speed and Doppler factor of the
Dhurde, Samir +3 more
arxiv +3 more sources
Some Implications of inverse-Compton Scattering of Hot Cocoon Radiation by relativistic jets in Gamma-Ray Bursts [PDF]
, 2014 Long Gamma-Ray Bursts (GRB) relativistic jets are surrounded by hot cocoons which confine jets during their punch out from the progenitor star. These cocoons are copious sources of X-ray photons that can be and are inverse-Compton (IC) scattered to MeV--GeV energies by electrons in the relativistic jet.
Kumar, Pawan, Smoot, George F.
arxiv +4 more sources
Stationary relativistic jets. [PDF]
Comput Astrophys Cosmol, 2015 In this paper we describe a simple numerical approach which allows to study the structure of steady-state axisymmetric relativistic jets using one-dimensional time-dependent simulations. It is based on the fact that for narrow jets with vz≈c$v_{z}\approx
Komissarov SS, Porth O, Lyutikov M.
europepmc +3 more sources
Propagation, cocoon formation, and resultant destabilization of relativistic jets [PDF]
Monthly notices of the Royal Astronomical Society, 2019 A cocoon is a by-product of a propagating jet that results from shock heating at the jet head. Herein, considering simultaneous cocoon formation, we study the stability of relativistic jets propagating through the uniform ambient medium. Using a simple analytic argument, we demonstrate that independent from the jet launching condition, the effective ...
J. Matsumoto, Y. Masada
arxiv +3 more sources
A Comparison of the Morphology and Stability of Relativistic and Nonrelativistic Jets [PDF]
, 1999 We compare results from a relativistic and a nonrelativistic set of 2D axisymmetric jet simulations. For a set of five relativistic simulations that either increase the Lorentz factor or decrease the adiabatic index we compute nonrelativistic simulations with equal useful power or thrust.
Alexander Rosen +14 more
arxiv +4 more sources
Magnetized, Relativistic Jets [PDF]
, 2017 Extragalactic relativistic jets are composed by charged particles and magnetic fields, as inferred from the synchrotron emission that we receive from them.
Fuentes, Antonio +3 more
core +2 more sources
The relativistic equation of motion in turbulent jets [PDF]
Adv.Stud.Theor.Phys.3:191-197,2009, 2009 The turbulent jets are usually described by classical velocities. The relativistic case can be treated starting from the conservation of the relativistic momentum. The two key assumptions which allow to obtain a simple expression for the relativistic trajectory and relativistic velocity are null pressure and constant density.
Zaninetti, Lorenzo
arxiv +2 more sources
Studies of Relativistic Jets in Active Galactic Nuclei with SKA [PDF]
, 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 ...
Agudo, Ivan +21 more
core +4 more sources
Observational signatures of stellar explosions driven by relativistic jets [PDF]
Monthly notices of the Royal Astronomical Society, 2022 The role of relativistic jets in unbinding the stellar envelope during a supernova (SN) associated with a gamma-ray burst (GRB) is unclear. To study that, we explore observational signatures of stellar explosions that are driven by jets.
Moshe Eisenberg, O. Gottlieb, E. Nakar
semanticscholar +1 more source