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In astrophysics, the ergosphere is a region located outside a rotating black hole's outer event horizon. Its name was proposed by Remo Ruffini and John Archibald Wheeler during the Les Houches lectures in 1971 and is derived from Ancient Greek ἔργον (ergon) 'work'. It received this name because it is … See more
As a black hole rotates, it twists spacetime in the direction of the rotation at a speed that decreases with distance from the event horizon. This process is known as the Lense–Thirring effect or frame-dragging. Because of this … See more
A suspended plumb, held stationary outside the ergosphere, will experience an infinite/diverging radial pull as it approaches the static limit. At some point it will start to fall, resulting in a gravitomagnetically induced spinward motion. An … See more
The size of the ergosphere, the distance between the ergosurface and the event horizon, is not necessarily proportional to the radius of the … See more
• Chandrasekhar, Subrahmanyan (1999). Mathematical Theory of Black Holes. Oxford University Press. ISBN 0-19-850370-9 See more
Wikipedia text under CC-BY-SA license Penrose process - Wikipedia
The outer surface of the ergosphere is the surface at which light that moves in the direction opposite to the rotation of the black hole remains at a fixed angular coordinate, according to an external observer. Since massive particles necessarily travel slower than light, massive particles will necessarily move along with the black hole's rotation. The inner boundary of the ergosphere is the event horizon, the spatial perimeter beyond which light cannot escape.
Wikipedia · Text under CC-BY-SA licenseBlack hole - Wikipedia
The ergosphere of a black hole is a volume bounded by the black hole's event horizon and the ergosurface, which coincides with the event horizon at the poles but is at a much greater distance around the equator.
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Ergosphere and shadow of a rotating regular black hole
Aug 1, 2020 · This paper investigates the ergosphere and shadow of a rotating regular black hole solution obtained by coupling Einstein's gravity to nonlinear electrodynamics. The authors …
Event Horizon and Accretion Disk - Physics of the Universe
Learn about the event horizon, the edge of a black hole where nothing can escape, and the accretion disk, the spinning matter around it. Also, discover the ergosphere, the region of …
NASA Simulation Suggests Black Holes May Make Ideal Dark …
Jun 23, 2015 · The web page explains how dark matter particles can collide and annihilate in the ergosphere, a region around a spinning black hole, producing high-energy gamma rays. It also …
After 50 Years, Experiment Finally Shows Energy Could …
Jun 25, 2020 · Physicists from the University of Glasgow have demonstrated that sound waves can pick up energy from a rotating disc, analogous to a black hole's ergosphere. This confirms a 50-year-old theoretical process proposed by …
Adjustable Ergonomic Furniture • Ergosphere
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general relativity - What's the inner ergosphere in a …
Sep 24, 2020 · The ergosphere is where the left side above is equal to zero, and since this is a quadratic in $r$ solving it gives us two ergosphere boundaries: $$ r_e^\pm = m \pm \sqrt{m^2 - a^2 \cos^2\theta } $$ The radius $r_e^+$ is the …
The ergosphere is a region where the time-translation vector becomes spacelike in a rotating black hole. This paper presents a model of the ergosphere based on a line element with a …
