How do recollimation-induced instabilities shape the propagation of hydrodynamic relativistic jets?

Abstract

Recollimation is a phenomenon of particular importance in the dynamic evolution of jets and in the emission of high-energy radiation. Additionally, the full comprehension of this phenomenon provides insights into fundamental properties of jets in the vicinity of the Active Galactic Nucleus (AGN). Three-dimensional (magneto-)hydrodynamic simulations revealed that the jet conditions at recollimation favor the growth of strong instabilities, challenging the traditional view-supported from two-dimensional simulations-of confined jets undergoing a series of recollimation and reflection shocks. To investigate the stability of relativistic jets in AGNs at recollimation sites, we perform a set of long duration three-dimensional relativistic hydrodynamic simulations with the state-of-the-art PLUTO code, to focus on the development of hydrodynamical instabilities. We explore the non-linear growth of the instabilities and their effects on the physical jet properties as a function of the initial jet parameters: jet Lorentz factor, temperature, opening angle and jet-environment density-contrast. The parameter space is designed to describe low-power, weakly magnetized jets at small distances from the core (around the parsec scale). All collimating jets we simulated develop instabilities. Recollimation instabilities decelerate the jet, heat it, entrain external material, and move the recollimation point to shorter distances from the core. This is true for both conical and cylindrical jets. The instabilities, that are first triggered by the centrifugal instability, appear to be less disruptive in the case of narrower, denser, more relativistic, and warmer jets. These results provide valuable insights into the complex processes governing AGN jets and could be used to model the properties of low-power, weakly magnetized jetted AGNs.

23 pags., 2 tabs., 48 figs., 4 vids. https://drive.google.com/file/d/1Gxcvvi3a_d8w5VKYUEcOIetuEhFt1okH/view?usp=drive_link https://drive.google.com/file/d/1ciL7gGSmgToaot9w4O_O-3zrIkWGXvkJ/view?usp=drive_link https://drive.google.com/file/d/1zCRQ15c_1x2B-vNdrBjrtN5VZ54r_8B2/view?usp=drive_link https://drive.google.com/file/d/1BhjvFDv3wAEpy0Rvz3i79k2kUg4ZRU8u/view?usp=drive_link submitted to A&A

References in corpus (57)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• The Co-Evolution of Galaxies and Supermassive Black Holes: Insights from Surveys of the Contemporary Universe
• Neutrino emission from the direction of the blazar TXS 0506+056 prior to the IceCube-170922A alert
• Relativistic Jets in Active Galactic Nuclei
• On the fundamental dichotomy in the local radio-AGN population: accretion, evolution, and host galaxy properties
• Structured jets in TeV BL Lac objects and radiogalaxies
• The PLUTO Code for Adaptive Mesh Computations in Astrophysical Fluid Dynamics
• MOJAVE. X. Parsec-Scale Jet Orientation Variations and Superluminal Motion in AGN
• The Structure and Dynamics of the Sub-parsec Scale Jet in M87 Based on 50 VLBA Observations Over 17 Years at 43 GHz
• The blazar TXS 0506+056 associated with a high-energy neutrino: insights into extragalactic jets and cosmic ray acceleration
• An HLLC Riemann Solver for Relativistic Flows: I. Hydrodynamics
• Dynamical models for jet deceleration in the radio galaxy 3C 31
• The Piecewise Parabolic Method for Multidimensional Relativistic Fluid Dynamics
• Systematic properties of decelerating relativistic jets in low-luminosity radio galaxies
• Relativistic Jets in Active Galactic Nuclei und Microquasars
• A pilot study of the radio-emitting AGN population: the emerging new class of FR0 radio-galaxies
• Fermi/LAT broad emission line blazars
• Inside the Bondi radius of M87
• On the origin of the gamma-ray emission from the flaring blazar PKS 1222+216
• The structure of hydrodynamic $\gamma$-ray burst jets
• The local radio-galaxy population at 20 GHz
• Formation of dynamical structures in relativistic jets: the FRI case
• Recollimation Shocks in Magnetized Relativistic Jets
• A Particle Module for the PLUTO code: II - Hybrid Framework for Modeling Non-thermal emission from Relativistic Magnetized flows
• Causality and stability of cosmic jets
• On the deceleration of FRI jets: mass loading by stellar-winds
• Progress in unveiling extreme particle acceleration in persistent astrophysical jets
• The structure of weakly-magnetized $\gamma$-ray burst jets
• Studies of the Jet in BL Lacertae I. Recollimation Shock and Moving Emission Features
• Jet collimation in NGC 315 and other nearby AGN
• Simulating the dynamics and non-thermal emission of relativistic magnetised jets I. Dynamics
• Linear stability analysis of magnetized relativistic jets: the nonrotating case
• Rapid and multi-band variability of the TeV-bright active nucleus of the galaxy IC 310
• Two-dimensional Numerical Study for Rayleigh-Taylor and Richtmyer-Meshkov Instabilities in Relativistic Jets
• Reconfinement and Loss of Stability in Jets from Active Galactic Nuclei
• A structure and energy dissipation efficiency of relativistic reconfinement shocks
• Hydrodynamic Collimation of Relativistic Outflows: Semianalytic Solutions and Application to Gamma-Ray Bursts
• Particle Acceleration in Shearing Flows: Efficiencies and Limits
• Parsec-scale radio structure of 14 Fanaroff-Riley type 0 radio galaxies
• Recollimation shocks and radiative losses in extragalactic relativistic jets
• Propagation, cocoon formation, and resultant destabilization of relativistic jets
• Relativistic Centrifugal Instability
• Linear Theory of the Rayleigh-Taylor Instability at a Discontinuous Surface of a Relativistic Flow
• Magnetic inhibition of the recollimation instability in relativistic jets
• Parsec-scale Properties of eight Fanaroff-Riley Type 0 Radio Galaxies
• The different flavors of extragalactic jets: the role of relativistic flow deceleration
• Internal instabilities in magnetized jets
• The jet collimation profile at high resolution in BL Lacertae
• Extreme blazars: the result of unstable recollimated jets?
• Interface instabilities in hydrodynamic relativistic jets
• Jets in FR0 radio galaxies
• The polarization of the synchrotron radiation from a recollimated jet: application to high-energy BL Lacs
• PyPLUTO: a data analysis Python package for the PLUTO code
• Numerical Investigation of Instabilities in Over-pressured Magnetized Relativistic Jets
• Stochastic acceleration in Extreme TeV BL Lacs through MCMC
• Instabilities at recollimation shocks in MHD jets

Cited by in corpus (1)

• Instabilities at recollimation shocks in MHD jets