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.
The Jeansequations are a set of partial differential equations that describe the motion of a collection of stars in a gravitational field. The Jeans equations...
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...
Sir James Hopwood Jeans OM FRS (11 September 1877 – 16 September 1946) was an English physicist, astronomer and mathematician. Born in Ormskirk, Lancashire...
Boltzmann equation, these moments are then related by various forms of continuity equations, of which most notable are the Jeansequations and Virial...
and dark matter, the Jeansequations need to be used with density profiles for each component. Dark matter halo Jeansequations Navarro–Frenk–White profile...
Boltzmann's from other transport equations like Fokker–Planck or Landau equations. Arkeryd, Leif (1972). "On the Boltzmann equation part I: Existence". Arch....
and magnetism, known as Maxwell's equations. There are nontrivial solutions of the homogeneous Maxwell's equations (without charges or currents), describing...
exercises using the method of inversion, such as found in James Hopwood Jeans textbook Mathematical Theory of Electricity and Magnetism. In general relativity...
can be used as a tool to construct equations that relate non-associated physico-chemical properties. The equations may reveal undiscovered or overlooked...
Rayleigh had derived theoretically a formula, now known as the Rayleigh–Jeans law, that could reasonably predict long wavelengths but failed dramatically...
Carbinaw" to Kim Kardashian). Mom Jeans — Inspired by writer Tina Fey purchasing high-waisted jeans by accident, these jeans feature 9-inch zippers, casual...
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...
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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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...
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...
Mild-slope equation – Physics phenomenon and formula Morison equation – Equation for force on an object in sea waves Navier–Stokes equations – Equations describing...