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Jeans equations information


University of Texas N-body Simulation. Governed by Jeans equations in a gravitational potential

The Jeans equations are a set of partial differential equations that describe the motion of a collection of stars in a gravitational field. The Jeans equations relate the second-order velocity moments to the density and potential of a stellar system for systems without collision. They are analogous to the Euler equations for fluid flow and may be derived from the collisionless Boltzmann equation. The Jeans equations can come in a variety of different forms, depending on the structure of what is being modelled. Most utilization of these equations has been found in simulations with large number of gravitationally bound objects.

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Jeans equations

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The Jeans equations are a set of partial differential equations that describe the motion of a collection of stars in a gravitational field. The Jeans equations...

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Jeans instability

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The Jeans instability is a concept in astrophysics that describes an instability that leads to the gravitational collapse of a cloud of gas or dust. It...

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James Jeans

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Sir James Hopwood Jeans OM FRS (11 September 1877 – 16 September 1946) was an English physicist, astronomer and mathematician. Born in Ormskirk, Lancashire...

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Stellar dynamics

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Boltzmann equation, these moments are then related by various forms of continuity equations, of which most notable are the Jeans equations and Virial...

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Virial mass

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and dark matter, the Jeans equations need to be used with density profiles for each component. Dark matter halo Jeans equations Navarro–Frenk–White profile...

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Boltzmann equation

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Boltzmann's from other transport equations like Fokker–Planck or Landau equations. Arkeryd, Leif (1972). "On the Boltzmann equation part I: Existence". Arch....

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Electromagnetic radiation

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and magnetism, known as Maxwell's equations. There are nontrivial solutions of the homogeneous Maxwell's equations (without charges or currents), describing...

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Conformal map

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exercises using the method of inversion, such as found in James Hopwood Jeans textbook Mathematical Theory of Electricity and Magnetism. In general relativity...

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Conversion of units

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can be used as a tool to construct equations that relate non-associated physico-chemical properties. The equations may reveal undiscovered or overlooked...

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Planck constant

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Rayleigh had derived theoretically a formula, now known as the Rayleigh–Jeans law, that could reasonably predict long wavelengths but failed dramatically...

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List of Saturday Night Live commercial parodies

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Carbinaw" to Kim Kardashian). Mom Jeans — Inspired by writer Tina Fey purchasing high-waisted jeans by accident, these jeans feature 9-inch zippers, casual...

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List of things named after Lord Rayleigh

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Rayl, rayl or Rayleigh Rayleigh–Faber–Krahn inequality Rayleigh–Jeans law Rayleigh–Jeans catastrophe Rayleigh–Ritz method Rayleigh–Schrödinger perturbation...

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Gravitational collapse

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critical mass above which a cloud will undergo such collapse is called the Jeans mass. This mass depends on the temperature and density of the cloud but...

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Wien approximation

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approximately equals the Wien approximation at high frequencies. The Rayleigh–Jeans law developed by Lord Rayleigh may be used to accurately describe the long...

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List of DoReMi Market episodes

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November 18 Mokdong Moonlight Street Market, Seoul AS Kids on the Block NewJeans - Zero Stray Kids (Changbin, Felix) Noraebang Accompaniment Quiz Taeyong...

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Plasma oscillation

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Irving Langmuir and Lewi Tonks in the 1920s. They are parallel in form to Jeans instability waves, which are caused by gravitational instabilities in a...

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Method of image charges

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ISBN 978-0-321-85656-2. Jeans 1908, p. 186 Jackson 1962, p. 111 Tikhonov, Andrey N.; Samarskii, Alexander A. (1963). Equations of Mathematical Physics...

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Index of wave articles

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Sawtooth wave Schrödinger equation Sea state Seiche Seismic wave Seismograph Seismology Sellmeier equation Shallow water equations Shive wave machine Shock...

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Outline of fluid dynamics

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Mild-slope equation – Physics phenomenon and formula Morison equation – Equation for force on an object in sea waves Navier–Stokes equations – Equations describing...

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