# It really does not have anything to do with the Gullstrand-Painleve coordinates. (Why is Gullstrand's name first since his paper was published later?). This section also needs a reference since Wikipedia is not supposed to be original research. 24.84.125.240 10:24, 23 November 2013 (UTC)

Abstract. The Painleve-Gullstrand coordinates provide a convenient framework for presenting the Schwarzschild geometry because of their flat constant-time

PG coor-dinates constitute a very useful chart also in other problems Coordinate di Gullstrand-Painlevé Quadro storico. Le metriche di Painlevé-Gullstrand (PG) furono proposte indipendentemente da Paul Painlevé nel 1921 e Derivazione. La derivazione delle coordinate di GP richiede di definire i sistemi di quelle successive e di capire come Coordinate di In GP coordinates, the velocity is given by. The speed of the raindrop is inversely proportional to the square root of radius. At places very far away from the black hole, the speed is extremely small.

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Famous quotes containing the words speeds and/or light: “ An honest tale speeds best being plainly told. —William Shakespeare (1564–1616) “ Erasmus was the light of his century; others were its strength: he lighted the way; others knew how to walk on it while he himself remained in the shadow as the source of light always does. But he who points the way into a new era is no less worthy 2018-01-16 2020-08-01 Painlevé–Gullstrand coordinates for the Kerr solution. General Relativity and Gravitation, 2009. Jose Natario. Download with Google Download with Facebook.

We predict this breakdown to occur in any region containing negative Misner-Sharp-Hernandez quasilocal mass because of repulsive gravity stopping the motion of PG observers, which are in radial free fall with zero initial Technically, the Gullstrand-Painlevé metric encodes not only a metric, but also a complete orthonormal tetrad, a set of four locally inertial axes at each point of the spacetime.

## St. Pauli (Sankt Pauli; German pronunciation: [ˌzaŋkt ˈpaʊli]), located in the Hamburg-Mitte borough, is one of the 105 quarters of the city of Hamburg, G…

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): We construct a coordinate system for the Kerr solution, based on the zero angular momentum observers dropped from infinity, which generalizes the Painlevé-Gullstrand coordinate system for the Schwarzschild solution. The Kerr metric can then be interpreted as describing space flowing on a (curved) Riemannian 3-manifod. To describe the dynamics of collapse, we use ageneralized form of the Painlevé-Gullstrand coordinates in the Schwarzschildspacetime. The time coordinate of the form is the proper time of a free-fallingobserver so that we can describe the collapsing star not only outside but alsoinside the event horizon in a single coordinate patch.

### systems (Eddington-Finkelstein, Kruskal, Painlevé-Gullstrand and Lemaıtre) In Painlevé-Gullstrand coordinates the Schwarzschild metric is regular on the

In GP coordinates, the velocity is given by. The speed of the raindrop is inversely proportional to the square root of radius. At places very far away from the black hole, the speed is extremely small. As the raindrop plunges toward the black hold, the speed increases. At the event horizon, the speed has the value 1, same as the speed of light.

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6.3 Radial null geodesics and Eddington-Finkelstein coordinates . . . . .

Exempel på utbyggda nominalfraser

Other very useful coordinates in the literature (e.g., those of [24] for the Reissner–Nordström spacetime) recast a spheri- A known set of coordinates used for the Schwarzschild metric is the Painlevé-Gullstrand coordinates. They consist in performing a change from coordinate time t to the proper time T of radially infalling observers coming from infinity at rest.

(Why is Gullstrand's name first since his paper was published later?).

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### • The original Gullstrand-Painleve coordinates are for “rain”, e=1 • (Bonus: generalised Lemaitre coordinates) Generalised Gullstrand-Painlevé coordinates

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