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Static Pressure of Hot Gas: Its Effect on the Gas Disks of Galaxies
Anatoly V. Zasov, Alexander V. Khoperskov
The static pressure of the hot gas that fills clusters and groups of galaxies can affect significantly the volume density and thickness of the gas disks in galaxies. In combination…
Midplane Gas Density and the Schmidt Law
A. V. Zasov, O. V. Abramova
The thickness of isothermal gaseous layers and their midplane volume densities ρ_{gas}(R) were calculated for several spiral and LSB galaxies by solving the self-consistent equilib…
Galaxies with unusually high abundances of molecular hydrogen
A. V. Kasparova, A. V. Zasov
A sample of 66 galaxies from the catalog of Bettoni et al. (CISM) with anomalously high molecular-to-atomic hydrogen mass ratios (M_{mol}/M_{HI}>2) is considered. The sample galaxi…
The Gas Content in Galactic Disks: Correlation with Kinematics
A. V. Zasov, A. A. Smirnova
We consider the relationship between the total HI mass in late-type galaxies and the kinematic properties of their disks. The mass for galaxies with a wide variety of proper…
Disk-to-halo mass ratio evaluations based on the numerical models of collisionless disks
A. V. Zasov, A. V. Khoperskov, N. V. Tyurina
We propose that the lower bound of the stellar radial velocity dispersion c_r of an equilibrium stellar disk is determined by the gravitational stability condition. We compared the…
Minimum Velocity Dispersion in Stable Stellar Disks. Numerical Simulations
A. V. Khoperskov, A. V. Zasov, N. V. Tyurina
N-body dynamical simulations are used to analyze the conditions for the gravitational stability of a three-dimensional stellar disk in the gravitational field of two rigid spherica…