Simulation of stream falling onto a protoplanetary disk

Title	Simulation of stream falling onto a protoplanetary disk
Authors	V. V. Grigoryev¹, T. V. Demidova¹ ¹Crimean astrophysical observatory
Annotation	Numerical modeling has shown that in the early stages of the evolution of the protoplanetary disk of a young star, remnants of a protostellar cloud in the form of clumps of matter can be preserved in its vicinity. The accretion of such clumps onto a protoplanetary disk may occur in the immediate vicinity of the star. In the process of falling onto a protoplanetary disk, a compact cloud is pulled into a stream of gas, the collision of which with the disk leads to distortion of its plane, as well as a number of photometric features that can be detected in observations. To study this process, a three-dimensional gas dynamic simulation was performed of the fall of a finite stream of gas, comparable in mass to Jupiter, onto a protoplanetary disk orbiting a Sun-like star. The collision of the stream with the protoplanetary disk occurs at a distance of sim 7 au from the star. The calculations took into account the viscosity and thermal conductivity in the gas. During the dynamic evolution, the inner regions of the original disk were deformed, forming an inner disk of a smaller size inclined to the original plane. The features of this process were analyzed: the angle of inclination of the inner disk and its evolution, the rate of accretion into the 0.2 au region, and the shape of the disks.
Keywords	numerical gas dynamics, protoplanetary disks, T Tauri stars.
Citation	Grigoryev V. V., Demidova T. V. ''Simulation of stream falling onto a protoplanetary disk'' [Electronic resource]. Proceedings of the International Scientific Youth School-Seminar "Mathematical Modeling, Numerical Methods and Software complexes" named after E.V. Voskresensky (Saransk, July 26-28, 2024). Saransk: SVMO Publ, 2024. - pp. 40-44. Available at: https://conf.svmo.ru/files/2024/papers/paper07.pdf. - Date of access: 03.12.2024.

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Simulation of stream falling onto a protoplanetary disk

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