The effective polytropic index in a magnetized plasma
نویسندگان
چکیده
منابع مشابه
Relativistic Parker winds with variable effective polytropic index
Spherically symmetric hydrodynamical outflows accelerated thermally in the vicinity of a compact object are studied by generalizing an equation of state with a variable effective polytropic index, appropriate to describe relativistic temperatures close to the central object and nonrelativistic ones further away. Relativistic effects introduced by the Schwarzschild metric and the presence of rel...
متن کاملSelf-Similar Dynamics of a Magnetized Polytropic Gas
In broad astrophysical contexts of large-scale gravitational collapses and outflows and as a basis for various further astrophysical applications, we formulate and investigate a theoretical problem of self-similar magnetohydrodynamics (MHD) for a non-rotating polytropic gas of quasi-spherical symmetry permeated by a completely random magnetic field. Within this framework, we derive two coupled ...
متن کاملa magnetized plasma
An invited Perspective to mark the election of the author to the fellowship of the Royal Society in 2014. Explosive instability and erupting flux tubes in a magnetized plasma S. C. Cowley1,2, B. Cowley3, S. A. Henneberg4 and H. R. Wilson4 1CCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, UK 2Department of Physics, Imperial College, Prince Consort Road, London SW7 2BZ, UK 3Department of Phy...
متن کاملNeutrino emission via the plasma process in a magnetized plasma
The decay of electromagnetic oscillations in a plasma into neutrinos is of interest as a stellar energy loss mechanism [1,2]. The presence of a plasma allows the refractive index to be less than unity, which is necessary for the decay of a photon into a νν̄ pair. The resulting “plasma process” for neutrino emission, has been studied in the presence of an unmagnetized plasma [2–5]. There were als...
متن کاملPonderomotive effects in a magnetized plasma
2014 Results concerning the ponderomotive effects in a collisionless magnetized plasma are presented. The main result concerns the fundamental difference between a three-dimensional plasma, which follows a Boltzmann equilibrium, and a two-dimensional plasma, where the high frequency field and the plasma inhomogeneities are perpendicular to the background magnetic field, and where the nonlinear ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Geophysical Research: Space Physics
سال: 1997
ISSN: 0148-0227
DOI: 10.1029/97ja02447