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Gas flow in a two component galactic disk (1994)

Noguchi, M. ; Shlosman, I.

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Publication Date: 2019-08-28

Description: Numerical simulations of two-component (stars + gas) self-gravitating galactic disks show that the interstellar gas can significantly affect the dynamical evolution of the disk even if its mass fraction (relative to the total galaxy mass) is as low as several percent. Aided by efficient energy dissipation, the gas becomes gravitationally unstable on local scale and forms massive clumps. Gravitational scattering of stars by these clumps leads to suppression of bar instability usually seen in heavy stellar disks. In this case, gas inflow towards the galactic center is driven by dynamical friction which gas clumps suffer instead of bar forcing.

Keywords: ASTROPHYSICS

Type: Astrophysics and Space Science (ISSN 0004-640X); 216; 2-Jan; p. 347-351

Format: text

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