scholarly journals Black holes and fundamental fields in numerical relativity: Initial data construction and evolution of bound states

2014 ◽  
Vol 89 (10) ◽  
Author(s):  
Hirotada Okawa ◽  
Helvi Witek ◽  
Vitor Cardoso
Keyword(s):  
Black Holes ◽  
Initial Data ◽  
Bound States ◽  
Numerical Relativity

MULTI-PUNCTURE INITIAL DATA IN NUMERICAL RELATIVITY

2012 ◽  
Vol 07 ◽  
pp. 247-258
Author(s):  
CHUN-YU LIN ◽  
ZHOUJIAN CAO ◽  
HWEI-JANG YO
Keyword(s):  
Black Holes ◽  
Initial Data ◽  
High Precision ◽  
Local Convergence ◽  
Numerical Relativity ◽  
Linear Momentum ◽  
Computational Resource ◽  
Convergence Test

We present a spectral multi-puncture initial data solver based on the LORENE library http://www.lorene.obspm.fr/ . The solver generates multi black holes initial data with arbitrary linear momentum and spin within a moderate computational resource. The local convergence test shows that the solution rapidly converged to a high precision.

scholarly journals Up-down instability of binary black holes in numerical relativity

2021 ◽  
Vol 103 (6) ◽  
Author(s):  
Vijay Varma ◽  
Matthew Mould ◽  
Davide Gerosa ◽  
Mark A. Scheel ◽  
Lawrence E. Kidder ◽  
...  
Keyword(s):  
Black Holes ◽  
Numerical Relativity ◽  
Binary Black Holes

scholarly journals New conformally flat initial data for spinning black holes

2002 ◽  
Vol 65 (10) ◽  
Author(s):  
Sergio Dain ◽  
Carlos O. Lousto ◽  
Ryoji Takahashi
Keyword(s):  
Black Holes ◽  
Initial Data ◽  
Conformally Flat

scholarly journals Initial data for perturbed Kerr black holes on hyperboloidal slices

2014 ◽  
Vol 31 (16) ◽  
pp. 165001 ◽  
Author(s):  
David Schinkel ◽  
Rodrigo Panosso Macedo ◽  
Marcus Ansorg
Keyword(s):  
Black Holes ◽  
Initial Data ◽  
Kerr Black Holes

scholarly journals Black hole superradiance as a probe of ultra-light new particles

2016 ◽  
Vol 12 (S324) ◽  
pp. 273-278
Author(s):  
Robert Lasenby
Keyword(s):  
Beyond Standard Model ◽  
Black Holes ◽  
Black Hole ◽  
Standard Model ◽  
Gravitational Wave ◽  
Exponential Growth ◽  
Gravitational Radiation ◽  
Bound States ◽  
Penrose Process ◽  
Energy And Momentum

AbstractBosonic fields around a spinning black hole can be amplified via ‘superradiance’, a wave analogue of the Penrose process, which extracts energy and momentum from the black hole. For hypothetical ultra-light bosons, with Compton wavelengths on ≳ km scales, such a process can lead to the exponential growth of gravitationally bound states around astrophysical Kerr black holes. If such particles exist, as predicted in many theories of beyond Standard Model physics, then these bosonic clouds give rise to a number of potentially-observable signals. Among the most promising are monochromatic gravitational radiation signals which could be detected at Advanced LIGO and future gravitational wave observatories.

scholarly journals Instability of charged massive scalar fields in bound states around Kerr–Sen black holes

2015 ◽  
Vol 24 (14) ◽  
pp. 1550102 ◽  
Author(s):  
Haryanto M. Siahaan
Keyword(s):  
Black Holes ◽  
Bound States ◽  
Gordon Equation ◽  
Scalar Fields ◽  
Bound State ◽  
Imaginary Component ◽  
Scalar Perturbation ◽  
Massive Scalar ◽  
Massive Scalar Field ◽  
Klein Gordon

In this paper, we show the instability of a charged massive scalar field in bound states around Kerr–Sen black holes. By matching the near and far region solutions of the radial part in the corresponding Klein–Gordon equation, one can show that the frequency of bound state scalar fields contains an imaginary component which gives rise to an amplification factor for the fields. Hence, the unstable modes for a charged and massive scalar perturbation in Kerr–Sen background can be shown.

The Biggest Ears in the Sky: LIGO

2020 ◽  
pp. 108-136
Author(s):  
John W. Moffat
Keyword(s):  
Black Holes ◽  
Gravitational Waves ◽  
Nobel Prize ◽  
Executive Director ◽  
Numerical Relativity ◽  
Washington State ◽  
Wave Form ◽  
Press Conference ◽  
The Masses ◽  
First Time

At a press conference on February 11, 2016, David Reitz, LIGO Executive Director, announced, “We did it!” They detected gravitational waves for the first time. Both LIGO sites, in Washington state and Louisiana, registered the incoming gravitational waves from two black holes colliding and merging far away. Over the following months, more mergers were detected. Gravitational waves are caused by the acceleration of a massive object, which stretches and compresses spacetime in a wave-like motion that is incredibly small and difficult to detect. Numerical relativity research over decades has produced over a quarter of a million template solutions of Einstein’s equations. The best template fit to the wave form data identifies the masses and spins of the two merging black holes. Much of this chapter describes the technology of the LIGO apparatus. On October 3, 2017, Barish, Thorne, and Weiss, the founders of LIGO, received the Nobel Prize for Physics.

scholarly journals Close limit evolution of Kerr-Schild type initial data for binary black holes

2002 ◽  
Vol 65 (6) ◽  
Author(s):  
Olivier Sarbach ◽  
Manuel Tiglio ◽  
Jorge Pullin
Keyword(s):  
Black Holes ◽  
Initial Data ◽  
Binary Black Holes
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