COLLISION OF HIGHLY RELATIVISTIC PARTICLES WITH BLACK HOLES: THE GRAVITATIONAL RADIATION GENERATED

2003 ◽  
Author(s):  
VITOR CARDOSO ◽  
JOSÉ P. S. LEMOS
Keyword(s):  
Black Holes ◽  
Gravitational Radiation ◽  
Relativistic Particles

scholarly journals Rotation and Spin and Position Operators in Relativistic Gravity and Quantum Electrodynamics

2019 ◽  
Author(s):  
Robert F O'Connell
Keyword(s):  
Black Holes ◽  
General Relativity ◽  
Gravitational Radiation ◽  
Quantum Electrodynamics ◽  
Binary Systems ◽  
Center Of Mass ◽  
Position Operator ◽  
Spinning Particle ◽  
Classical Version ◽  
Relativistic Particles

First, we examine how spin is treated in special relativity and the necessity of introducing spin supplementary conditions (SSC) and how they are related to the choice of a center-of-mass of a spinning particle. Next, we discuss quantum electrodynamics and the Foldy-Wouthuysen transformation which we note is a position operator identical to the Pryce-Newton-Wigner position operator. The classical version of the operators are shown to be essential for the treatment of classical relativistic particles in general relativity, of special interest being the case of binary systems (black holes/neutron stars) which emit gravitational radiation.

scholarly journals Rotation and Spin and Position Operators in Relativistic Gravity and Quantum Electrodynamics

Universe ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 24 ◽  
Author(s):  
Robert F. O’Connell
Keyword(s):  
Black Holes ◽  
General Relativity ◽  
Gravitational Radiation ◽  
Quantum Electrodynamics ◽  
Binary Systems ◽  
Center Of Mass ◽  
Position Operator ◽  
Spinning Particle ◽  
Classical Version ◽  
Relativistic Particles

First, we examine how spin is treated in special relativity and the necessity of introducing spin supplementary conditions (SSC) and how they are related to the choice of a center-of-mass of a spinning particle. Next, we discuss quantum electrodynamics and the Foldy–Wouthuysen transformation which we note is a position operator identical to the Pryce–Newton–Wigner position operator. The classical version of the operators are shown to be essential for the treatment of classical relativistic particles in general relativity, of special interest being the case of binary systems (black holes/neutron stars) which emit gravitational radiation.

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 Dark matter gravity waves at LIGO and LISA

2019 ◽  
Vol 34 (16) ◽  
pp. 1950124
Author(s):  
Paul H. Frampton
Keyword(s):  
Black Holes ◽  
Dark Matter ◽  
Gravitational Wave ◽  
Gravity Waves ◽  
Gravitational Radiation ◽  
Massive Stars ◽  
Strain Sensitivity ◽  
Intermediate Mass ◽  
To Come ◽  
Merger Rate

We study the merger rate of dark matter PIMBHs (Primordial Intermediate Mass Black Holes). We conclude that the black holes observed by LIGO in GW150914 and later events were probably not dark matter PIMBHs but rather the result of gravitational collapse of very massive stars. To study the PIMBHs by gravitational radiation will require a detector sensitive to frequencies below 10 Hz and otherwise more sensitive than LIGO. The LISA detector, expected to come online in 2034, will be useful at frequencies below 1 Hz but further gravitational wave detectors beyond LISA, sensitive up to 10 Hz, and higher strain sensitivity will be necessary to fully study dark matter.

Modeling gravitational radiation from coalescing binary black holes

2002 ◽  
Vol 65 (12) ◽  
Author(s):  
J. Baker ◽  
M. Campanelli ◽  
C. O. Lousto ◽  
R. Takahashi
Keyword(s):  
Black Holes ◽  
Gravitational Radiation ◽  
Binary Black Holes
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