Affiliation:
1. Kazan State Power Engineering University , Kazan , Russia
Abstract
Abstract
In this paper, the mechanisms of star formation and the formation of the equatorial gas and dust disk of protostars are considered. The viscous dynamics of the interstellar matter of gas and dust disks is mainly determined by perturbations of the matter density during gas accretion onto the equilibrium core of the protostar. Using the model of pulsating perturbations of the density of the gas-dust envelope of the protostar and the Navier-Stokes equations, the formulas for the dynamic viscosity of Keplerian and almost Keplerian disks are obtained. It is shown that in the regime of unstable equilibrium of the envelope, accretion of gas onto the core of the protostar begins. In the regime of stable equilibrium, the fragmentation of the gas-dust envelope and the equatorial disk of the protostar occurs. In the ring-shaped fragments of the disk, the process of formation of “embryos” of planets begins and accretion on the “embryos” of the planet also begins.
Subject
Space and Planetary Science,Astronomy and Astrophysics
Reference25 articles.
1. Abdul’myanov TR. 2001. Determination of Libration Characteristics of Asteroids near Mean Motion Commensurabilities 1/1, 4/3, 3/2, 2/1, 7/3, 5/2, and 3/1. Sol Syst Res. 35(5):408–414.10.1023/A:1012308422348
2. Abdul’myanov TR. 2014. On the mechanism of the formation and mass growth of solar system bodies at the early stages of evolution. Moscow Univ Phys Bull. 69(6):558–564.10.3103/S0027134914060022
3. Abdul’myanov TR. Gas-Dynamic Equilibrium Condition of Dust Envelopes of Protostars and their Fragmentation. In Malkov O, Obridko V, Rastorguev A, Samus N, Editors. Modern Stellar Astronomy 2018. Moscow, Russia. IZMIRAN, 2018. p. 68–71. [(in Russian)].
4. Abdul’myanov TR. 2019. A General Model of Celestial Body Formation from Initial Condensation of Gas and Dust Particles to the “Embryos” of Planets. Moscow Univ Phys Bull. 74(4):309–322.10.3103/S0027134919040039
5. Abdul’myanov TR. 2020. Large-Scale Structure of Gas-and-Dust Disks and Stability of Gas-Dynamic Equilibrium of the Dust Envelopes of Young Stars. Astrophys Bull. 75(2):117–123.10.1134/S1990341320020029
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
1. Modern Stellar Astronomy;Astronomy Reports;2022-08