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KIAM Preprint № 4, Moscow, 2021
Authors: Kolesnichenko A.V.
Jeans instability of the protoplanetary circumstellar disk taking into account the magnetic field and radiation in the nonextensive Tsallis kinetics
Within the framework of the Tsallis non-extensive statistics, a derivation of the Jeans gravitational instability criteria is given for a self-gravitating protoplanetary disk, the substance of which consists of a mixture of a conducting ideal q-gas and modified radiation of a photon gas. The instability criteria are derived from the corresponding dispersion relations written for both neutral disk matter and magnetized plasma with modified blackbody radiation. The thermodynamics of a photon gas is constructed based on the nonextensive quantum entropy Tsallis, which depends on the deformation parameter. It is shown that blackbody radiation can stabilize the state of a nonextensive medium for a purely gaseous disk, and for an electrically conducting disk, the Jeans instability criterion is modified by a magnetic field and radiation pressure only in the transverse regime of propagation of the disturbance wave.
jeans criteria, protoplanetary disk, blackbody radiation, nonextensive Tsallis kinetics
Publication language: russian,  pages: 40
Research direction:
Mathematical modelling in actual problems of science and technics
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About authors:
  • Kolesnichenko Aleksandr Vladimirovich, RAS