Collimated Escaping Vortical Polar e–e+ Jets Intrinsically Produced by Rotating Black Holes and Penrose Processes

  title={Collimated Escaping Vortical Polar e–e+ Jets Intrinsically Produced by Rotating Black Holes and Penrose Processes},
  author={Reva Kay Williams},
  journal={The Astrophysical Journal},
  pages={952 - 963}
In this paper, I present results from theoretical and numerical (Monte Carlo) N-particle fully relativistic four-dimensional analysis of Penrose scattering processes (Compton and γγ⟶e-e+) in the ergosphere of a supermassive or stellar mass Kerr (rotating) black hole. Specifically, the escape conditions and the escaping orbits of the Penrose pair production (γγ⟶e-e+) electrons are analyzed, revealing that these particles escape along collimated, jet geodesic trajectories encircling the polar… 

Figures from this paper

Kerr geodesics, the Penrose process and jet collimation by a black hole

Aims. We re-examine the possibility that astrophysical jet collimation may arise from the geometry of rotating black holes and the presence of high-energy particles resulting from a Penrose process,

Particles under radiation thrust in Schwarzschild space–time from a flux perpendicular to the equatorial plane

Motivated by the picture of a thin accretion disc around a black hole, radiating mainly in the direction perpendicular to its plane, we study the motion of test particles interacting with a test

Observations of the Blandford–Znajek process and the magnetohydrodynamic Penrose process in computer simulations of black hole magnetospheres

In this paper we report the results of axisymmetric relativistic MHD simulations for the problem of Kerr black hole immersed into a rarefied plasma with ”uniform” magnetic field. The long term

Collimation of a spherical collisionless particles stream in Kerr spacetime

We examine the propagation of collisionless particles emitted from a spherical shell to infinity. The number distribution at infinity, calculated as a function of the polar angle, exhibits a small


We use a Monte Carlo code to calculate the geodesic orbits of test particles around Kerr black holes, generating a distribution function of both bound and unbound populations of dark matter (DM)

Magnetised accretion discs in Kerr spacetimes

We study the effect caused by external magnetic fields on the observed thermal spectra and iron line profiles of thin accretion discs formed around Kerr black holes and naked singularities. We aim to


Assuming that the spin a of the black hole presumably located at the core of the active galactic nucleus Messier 87 takes the value which maximizes the ergospheric volume of the Kerr spacetime, we

Fifty Years of Energy Extraction from Rotating Black Hole: Revisiting Magnetic Penrose Process

Magnetic Penrose process (MPP) is not only the most exciting and fascinating process mining the rotational energy of black hole but it is also the favored astrophysically viable mechanism for high

Wheeler equation in Kerr background and astrophysical jet collimation

The Wheeler equation has an extension in the Kerr background. It has an exact solution rep-resenting a running harmonic wave in the tortoise coordinate. The wave models astrophysical jets in a new

Sporadically Torqued Accretion Disks around Black Holes

The assumption that black hole accretion disks possess an untorqued inner boundary, the so-called zero-torque boundary condition, has been employed by models of black hole disks for many years.



General relativistic simulations of early jet formation in a rapidly rotating black hole magnetosphere

To investigate the formation mechanism of relativistic jets in active galactic nuclei and microquasars, we have developed a new general relativistic magnetohydrodynamic code in Kerr geometry. Here we

Upper Bounds on Collisional Penrose Processes Near Rotating Black Hole Horizons

In this paper, we develop a general formalism for calculating energies of particles which escape to infinity after a collision in black-hole ergospheres. A few examples, in particular the Compton

Formation of the radio jet in M87 at 100 Schwarzschild radii from the central black hole

Massive galaxies often are the source of well collimated jets of material that flow outwards for tens to hundreds of kiloparsecs from the regions surrounding the presumed black holes at their

Gamma-ray emission from advection dominated accretion flows around black holes: Application to the galactic center

We calculate the flux and spectrum of γ-rays emitted by a two-temperature advection-dominated accretion flow (ADAF) around a black hole. The γ-rays are from the decay of neutral pions produced

Electromagnetic extraction of energy from Kerr black holes

When a rotating black hole is threaded by magnetic field lines supported by external currents flowing in an equatorial disc, an electric potential difference will be induced. If the field strength is

Pair production and gamma-ray luminosities in hot accretion disks

Accretion disk models which involve a 10/sup 12/ K ion gas result in abundant pion production through proton-proton collisions. The pions produce neutrinos, ..gamma..-rays, positrons, and electrons.

Magnetohydrodynamic production of relativistic jets.

A magnetohydrodynamic model may explain the basic features of observed jets, including their speed and amount of collimation, and some of the details in the behavior and statistics of different jet-producing sources.

Hydromagnetic flows from accretion discs and the production of radio jets

Summary. We examine the possibility that energy and angular momentum are removed magnetically from accretion discs, by field lines that leave the disc surface and extend to large distances. We

Region of Magnetic Dominance near a Rotating Black Hole

Processes of collimation of electrically charged particles near a rotating black hole are discussed. It is assumed that the black hole is immersed in a weak magnetic field aligned with rotation axis.

Relativistic Outflow Magnetically Driven by Black Hole Rotation

In the universe, several kinds of relativistic jets have been discovered, and it is believed that they are formed by violent phenomena near black holes. Despite the advancement of observations and