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Thermodynamic concept imporant in astrophysics
In astrophysics, a polytrope is a thermodynamic system with pressure dependent upon density, leaving only one independent state variable. A polytropic
Polytrope
Thermodynamic process
Isothermal process Polytrope Quasistatic equilibrium Thermodynamics Vapor-compression refrigeration Horedt, G. P. (2004-08-10). Polytropes: Applications in
Polytropic_process
Maximum mass of a stable white dwarf star
Solving the hydrostatic equation leads to a model white dwarf that is a polytrope of index 3/2 – and therefore has radius inversely proportional to the
Chandrasekhar_limit
Dimensionless astrophysics equation
describe the run of pressure and density with radius and are known as polytropes of index n {\displaystyle n} . If an isothermal fluid (polytropic index
Lane–Emden_equation
Region of a star
the density gradient now also depends on concentration gradients. For a polytrope solution with n=3 (as in the Eddington stellar model for radiative zone)
Radiative_zone
Room in Teylers Museum, Haarlem, Netherlands
conduction Cabinet I Cabinet II - measuring instruments (lower shelf) Polytrope G.E. Sire Cabinet III: electricity Cabinet III Cabinet III Cabinet III
Teylers_Instrument_Room
Subfield of astronomy
a wide variety of tools which include analytical models (for example, polytropes to approximate the behaviors of a star) and computational numerical simulations
Astrophysics
Equation in mechanics
material. This equation of state is also a general case of the older Polytrope relation which also has a constant power relation. In some circumstances
Murnaghan_equation_of_state
Class of exact solutions to the Einstein field equations
method, 1958: Buchdahl ssspf, a relativistic generalization of a Newtonian polytrope, 1967: Kuchowicz ssspf, 1969: Heintzmann ssspf, 1978: Goldman ssspf, 1982:
Static spherically symmetric perfect fluid
Static_spherically_symmetric_perfect_fluid
isentropic, isotrope, isotropic, isotropy, pleiotropic, pleiotropy, polytrope, protrepsis, protreptic, psychotropic, treponeme, treponematosis, treponemiasis
List of Greek and Latin roots in English/P–Z
List_of_Greek_and_Latin_roots_in_English/P–Z
Luminosity–temperature relationship in stars
} where E is unitless, and not the energy. Modelling stars as polytropes with index 3/2 (in other words, assuming they follow a pressure-density
Hayashi_track
Brightest star in the constellation Eridanus
Schubert, Gerald (2015). "An exact solution for arbitrarily rotating gaseous polytropes with index unity". Monthly Notices of the Royal Astronomical Society.
Achernar
Equation describing a state of matter under a given set of conditions
function Table of thermodynamic equations Real gas Cluster expansion Polytrope Perrot, Pierre (1998). A to Z of Thermodynamics. Oxford University Press
Equation_of_state
Indian mathematician (1931–2004)
inhomogeneous plasmas. His work on the mathematical treatment of gaseous polytropes in the presence of a magnetic field is a breakthrough in this area. He
Surindar_Kumar_Trehan
Spherical collection of stars
dot galaxies are thought to be the progenitors of globular clusters. Polytrope Stellar population The label M before a number refers to Charles Messier's
Globular_cluster
isentropic, isotrope, isotropic, isotropy, pleiotropic, pleiotropy, polytrope, protrepsis, protreptic, psychotropic, treponeme, treponematosis, treponemiasis
List of Greek and Latin roots in English/T
List_of_Greek_and_Latin_roots_in_English/T
Extremely massive collection of stars
Local Group. Extragalactic Distance Scale Leonard-Merritt mass estimator Polytrope Taylor, Matthew; Puzia, Thomas; Gomez, Matias; Woodley, Kristin (17 March
Dark_globular_cluster
Indian-American physicist (1910–1995)
Cambridge in the summer of 1933, with a thesis on rotating self-gravitating polytropes. On 9 October, he was elected to a Prize Fellowship at Trinity College
Subrahmanyan_Chandrasekhar
Subfield of astronomy
stability before supernova. Lane–Emden equation – Polytrope equation solving stellar structure. Polytrope – Self-similar stellar models approximating interiors
Outline_of_astrophysics
Type of wave in plasma
Z_{D}=Z_{T}=1} ), equal temperatures ( T e = T i {\displaystyle T_{e}=T_{i}} ), polytrope exponents γ e = 1 , γ i = 3 {\displaystyle \gamma _{e}=1,\gamma _{i}=3}
Ion_acoustic_wave
Polymer solar cell Polymeric liquid crystal Polyphase coil Polyphase system Polytrope Polytropic process Polywater Polywell Pomeranchuk Prize Pomeron Ponderomotive
Index_of_physics_articles_(P)
POLYTROPE
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Boy/Male
Indian
Patient
Boy/Male
Hindu, Indian, Punjabi, Sikh
True Servant
Girl/Female
Hindu, Indian
The Primal Mother
Boy/Male
Muslim/Islamic
A companion of the Prophet (S.A.W)
Girl/Female
Muslim
Rose
Boy/Male
Arabic, Muslim
Glorious; Magnificent
Boy/Male
Tamil
Rising, Place of origin, Source, Beginning
Girl/Female
Arabic, Muslim
Noble
Boy/Male
Greek
Farmer.
Surname or Lastname
English (Kent)
English (Kent) : from Middle English apse ‘aspen tree’ (Old English æpse). See also Asp. Generally, this was a topographic name for someone who lived by an aspen or a habitational name from a place named with this word, as for example Apps in Surrey, Apse on the Isle of Wight, or Asps in Warwickshire. Occasionally it may have been applied as a nickname for a timorous person, with reference to the trembling leaves.Dutch : variant of Epps.
POLYTROPE
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POLYTROPE
POLYTROPE