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The Jeans mass is named after the British physicist Sir James Jeans, who considered the process of gravitational collapse within a gaseous cloud. He was able to show that, under appropriate conditions, a cloud, or part of one, would become unstable and begin to collapse when it lacked sufficient gaseous pressure support to balance the force of gravity.
Sir James Hopwood Jeans OM FRS [1] (11 September 1877 – 16 September 1946 [2]) was an English physicist, mathematician and an astronomer.He served as a secretary of the Royal Society from 1919 to 1929, and was the president of the Royal Astronomical Society from 1925 to 1927, and won its Gold Medal.
Comparison of Rayleigh–Jeans law with Wien approximation and Planck's law, for a body of 5800 K temperature.. In physics, the Rayleigh–Jeans law is an approximation to the spectral radiance of electromagnetic radiation as a function of wavelength from a black body at a given temperature through classical arguments.
Helical kink instability (a.k.a. helical instability) Rayleigh–Taylor instability (RTI, a.k.a. gravitational instability) Rotating instability, [30] Tearing mode instability (or resistive tearing instability [31]) Two-stream instability (a.k.a. beam-plasma instability, counter-streaming instability) Beam acoustic instability; Bump-on-tail ...
The square root of the ratio is about 6. I dislike the formula here as it makes Jeans Mass for Bernard 68, 10.117 solar masses and Cambridge's formula makes Jeans Mass 1.662 solar masses assuming it is all molecular hydrogen not just mostly. Anyway, it is advertised in Wikipedia as a collapsing cloud a star that will be born in 200,000 years.
It begins with a full-page citation of the famous passage in Plato's Republic, Book VII, laying out the allegory of the cave. The book made frequent reference to the quantum theory of radiation , begun by Max Planck in 1900, to Albert Einstein 's general relativity , and to the new theories of quantum mechanics of Heisenberg and Schrödinger ...
The world has entered an era of increasing instability as countries around the globe boost military spending in response to Russia’s invasion of Ukraine, the Hamas attack on Israel and China’s ...
Hydrodynamics simulation of a single "finger" of the Rayleigh–Taylor instability. [1] Note the formation of Kelvin–Helmholtz instabilities, in the second and later snapshots shown (starting initially around the level =), as well as the formation of a "mushroom cap" at a later stage in the third and fourth frame in the sequence.