scholarly journals Linear perturbations in force-free black hole magnetospheres -- II. Wave propagation

1997 ◽  
Vol 291 (1) ◽  
pp. 125-144 ◽  
Author(s):  
T. Uchida
Keyword(s):  
Black Hole ◽  
Wave Propagation ◽  
Free Black ◽  
Linear Perturbations

scholarly journals QUASINORMAL MODES AND LATE-TIME TAILS OF CANONICAL ACOUSTIC BLACK HOLES

2007 ◽  
Vol 16 (07) ◽  
pp. 1211-1218 ◽  
Author(s):  
PING XI ◽  
XIN-ZHOU LI
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Wave Propagation ◽  
Angular Momentum ◽  
Numerical Method ◽  
Time Scale ◽  
Quasinormal Modes ◽  
Late Time ◽  
Classical Wave ◽  
Acoustic Black Holes

In this paper, we investigate the evolution of classical wave propagation in the canonical acoustic black hole by a numerical method and discuss the details of the tail phenomenon. The oscillating frequency and damping time scale both increase with the angular momentum l. For lower l, numerical results show the lowest WKB approximation gives the most reliable result. We also find that the time scale of the interim region from ringing to tail is not affected obviously by changing l.

scholarly journals Thin-shell wormholes in (2 + 1)-dimensional Einstein-scalar theory

2017 ◽  
Vol 32 (10) ◽  
pp. 1750064 ◽  
Author(s):  
S. Habib Mazharimousavi ◽  
Z. Amirabi ◽  
M. Halilsoy
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Thin Shell ◽  
Infinite Class ◽  
Btz Black Hole ◽  
Scalar Theory ◽  
Potential Barriers ◽  
Field Extensions ◽  
Linear Perturbations ◽  
Thin Shell Wormholes

We present an infinite class of one-parameter scalar field extensions to the Bañados, Teitelboim and Zanelli (BTZ) black hole in 2 + 1 dimensions. By virtue of the scalar charge, the thin-shell wormhole supported by a linear fluid at the throat becomes stable against linear perturbations. More interestingly, we provide an example of thin-shell wormhole which is strictly stable in the sense that it is confined in between two classically intransmissible potential barriers.

scholarly journals NUMERICAL SIMULATION OF QUASI-NORMAL MODES IN TIME-DEPENDENT BACKGROUND

2004 ◽  
Vol 19 (03) ◽  
pp. 239-252 ◽  
Author(s):  
LI-HUI XUE ◽  
ZAI-XIONG SHEN ◽  
BIN WANG ◽  
RU-KENG SU
Keyword(s):  
Numerical Simulation ◽  
Black Hole ◽  
Wave Propagation ◽  
Normal Modes ◽  
Time Dependent ◽  
Massless Scalar ◽  
Scalar Wave ◽  
Schwarzschild Black Hole ◽  
Black Hole Background ◽  
Scattering Potential

We study the massless scalar wave propagation in the time-dependent Schwarzschild black hole background. We find that the Kruskal coordinate is an appropriate framework to investigate the time-dependent spacetime. A time-dependent scattering potential is derived by considering dynamical black hole with parameters changing with time. It is shown that in the quasinormal ringing both the decay time-scale and oscillation are modified in the time-dependent background.

scholarly journals On Time Evolution and Causality of Force‐free Black Hole Magnetospheres

2004 ◽  
Vol 608 (1) ◽  
pp. 411-417 ◽  
Author(s):  
Amir Levinson
Keyword(s):  
Black Hole ◽  
Time Evolution ◽  
Free Black
Sign in / Sign up

Export Citation Format

Share Document