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41 relations: ADM formalism, Age of the universe, Angular momentum, Binary star, Black hole, Boyer–Lindquist coordinates, CBS News, Celestial Mechanics and Dynamical Astronomy, Dynamical friction, Event horizon, Extreme mass ratio inspiral, First observation of gravitational waves, Frame-dragging, Galaxy merger, General relativity, Gravitational wave, Gravitational-wave astronomy, Gravity assist, Kerr metric, Light-year, LIGO, Mass in general relativity, National Geographic Society, Newton's laws of motion, NGC 6240, Numerical relativity, Observable universe, OJ 287, Parsec, PKS 1302-102, Post-Newtonian expansion, Retarded time, Solar mass, Specific orbital energy, Stellar black hole, Stellar dynamics, Supermassive black hole, The Astrophysical Journal, Toroid, Watt, Waveform.
ADM formalism
The ADM formalism (named for its authors Richard Arnowitt, Stanley Deser and Charles W. Misner) is a Hamiltonian formulation of general relativity that plays an important role in canonical quantum gravity and numerical relativity.
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Age of the universe
In physical cosmology, the age of the universe is the time elapsed since the Big Bang.
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Angular momentum
In physics, angular momentum (rarely, moment of momentum or rotational momentum) is the rotational equivalent of linear momentum.
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Binary star
A binary star is a star system consisting of two stars orbiting around their common barycenter.
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Black hole
A black hole is a region of spacetime exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it.
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Boyer–Lindquist coordinates
In the mathematical description of general relativity, the Boyer–Lindquist coordinates are a generalization of the coordinates used for the metric of a Schwarzschild black hole that can be used to express the metric of a Kerr black hole.
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CBS News
CBS News is the news division of American television and radio service CBS.
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Celestial Mechanics and Dynamical Astronomy
Celestial Mechanics and Dynamical Astronomy is a scientific journal covering the fields of astronomy and astrophysics.
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Dynamical friction
In astrophysics, dynamical friction or Chandrasekhar friction, sometimes called gravitational drag, is loss of momentum and kinetic energy of moving bodies through gravitational interactions with surrounding matter in space.
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Event horizon
In general relativity, an event horizon is a region in spacetime beyond which events cannot affect an outside observer.
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Extreme mass ratio inspiral
In astrophysics, an extreme mass ratio inspiral (EMRI) is the orbit of a relatively light object around a much heavier (by a factor 10,000 or more) object, that gradually decays due the emission of gravitational waves.
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First observation of gravitational waves
The first observation of gravitational waves was made on 14 September 2015 and was announced by the LIGO and Virgo collaborations on 11 February 2016.
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Frame-dragging
Frame-dragging is an effect on spacetime, predicted by Einstein's general theory of relativity, that is due to non-static stationary distributions of mass–energy.
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Galaxy merger
Galaxy mergers can occur when two (or more) galaxies collide.
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General relativity
General relativity (GR, also known as the general theory of relativity or GTR) is the geometric theory of gravitation published by Albert Einstein in 1915 and the current description of gravitation in modern physics.
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Gravitational wave
Gravitational waves are the disturbance in the fabric ("curvature") of spacetime generated by accelerated masses and propagate as waves outward from their source at the speed of light.
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Gravitational-wave astronomy
Gravitational-wave astronomy is an emerging branch of observational astronomy which aims to use gravitational waves (minute distortions of spacetime predicted by Einstein's theory of general relativity) to collect observational data about objects such as neutron stars and black holes, events such as supernovae, and processes including those of the early universe shortly after the Big Bang.
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Gravity assist
In orbital mechanics and aerospace engineering, a gravitational slingshot, gravity assist maneuver, or swing-by is the use of the relative movement (e.g. orbit around the Sun) and gravity of a planet or other astronomical object to alter the path and speed of a spacecraft, typically to save propellant and reduce expense.
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Kerr metric
The Kerr metric or Kerr geometry describes the geometry of empty spacetime around a rotating uncharged axially-symmetric black hole with a spherical event horizon.
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Light-year
The light-year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles.
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LIGO
The Laser Interferometer Gravitational-Wave Observatory (LIGO) is a large-scale physics experiment and observatory to detect cosmic gravitational waves and to develop gravitational-wave observations as an astronomical tool.
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Mass in general relativity
The concept of mass in general relativity (GR) is more complex than the concept of mass in special relativity.
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National Geographic Society
The National Geographic Society (NGS), headquartered in Washington, D.C., United States, is one of the largest non-profit scientific and educational institutions in the world.
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Newton's laws of motion
Newton's laws of motion are three physical laws that, together, laid the foundation for classical mechanics.
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NGC 6240
NGC 6240 is a nearby ultraluminous infrared galaxy (ULIRG) in the constellation Ophiuchus.
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Numerical relativity
Numerical relativity is one of the branches of general relativity that uses numerical methods and algorithms to solve and analyze problems.
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Observable universe
The observable universe is a spherical region of the Universe comprising all matter that can be observed from Earth at the present time, because electromagnetic radiation from these objects has had time to reach Earth since the beginning of the cosmological expansion.
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OJ 287
OJ 287 is a BL Lac object located 3.5 billion light-years away that has produced quasi-periodic optical outbursts going back approximately 120 years, as first apparent on photographic plates from 1891.
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Parsec
The parsec (symbol: pc) is a unit of length used to measure large distances to astronomical objects outside the Solar System.
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PKS 1302-102
PKS 1302-102 is a quasar in the Virgo constellation, located at a distance of approximately 1.1 Gpc (around 3.5 billion light-years).
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Post-Newtonian expansion
Post-Newtonian expansions in general relativity are used for finding an approximate solution of the Einstein field equations for the metric tensor.
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Retarded time
In electromagnetism, electromagnetic waves in vacuum travel at the speed of light c, according to Maxwell's Equations.
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Solar mass
The solar mass is a standard unit of mass in astronomy, equal to approximately.
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Specific orbital energy
In the gravitational two-body problem, the specific orbital energy \epsilon\,\! (or vis-viva energy) of two orbiting bodies is the constant sum of their mutual potential energy (\epsilon_p\,\!) and their total kinetic energy (\epsilon_k\,\!), divided by the reduced mass.
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Stellar black hole
A stellar black hole (or stellar-mass black hole) is a black hole formed by the gravitational collapse of a massive star.
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Stellar dynamics
Stellar dynamics is the branch of astrophysics which describes in a statistical way the collective motions of stars subject to their mutual gravity.
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Supermassive black hole
A supermassive black hole (SMBH or SBH) is the largest type of black hole, on the order of hundreds of thousands to billions of solar masses, and is found in the centre of almost all currently known massive galaxies.
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The Astrophysical Journal
The Astrophysical Journal, often abbreviated ApJ (pronounced "ap jay") in references and speech, is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler.
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Toroid
In mathematics, a toroid is a surface of revolution with a hole in the middle, like a doughnut, forming a solid body.
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Watt
The watt (symbol: W) is a unit of power.
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Waveform
A waveform is the shape and form of a signal such as a wave moving in a physical medium or an abstract representation.
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Binary black holes, Binary blackhole, Binary inspiral, Black hole binary, Black hole merger, Final parsec problem, Inspiral merger ringdown.
References
[1] https://en.wikipedia.org/wiki/Binary_black_hole
