Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991azh....68...65m&link_type=abstract
Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 68, Jan.-Feb. 1991, p. 65-77. In Russian.
Astronomy and Astrophysics
Astronomy
5
Density Wave Model, Galactic Structure, Gravitational Effects, Interstellar Gas, Spiral Galaxies, Gas Density, Gas Flow, Gravitational Fields, Shock Wave Propagation
Scientific paper
The flow of interstellar gas in the gravitational field of a galactic spiral density wave at a galactocentric distance of 5 kpc was calculated, taking into account thermal processes in the medium. It was shown that at the initial gas density of not greater than about 0.05/cu cm the influence of the spiral arms is reduced to a galactic shock only. At 0.05-0.2/cu cm, a phase transition occurs in the medium with formation of inhomogeneities stretched along arms-filaments which break down into clouds subsequently. Some data based on observations of H I clouds are accounted for in the framework of the theory. At not less than about 0.5/cu cm an intense nonlinear wave arises in the gas under the influence of the spiral density wave. Some arguments are presented in favor of the transformation of atomic hydrogen into molecular hydrogen in the accretion wave. An explanation of the 'sandwich' structure of the Galactic disk is also given.
No associations
LandOfFree
Evolution of interstellar gas in spiral galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Evolution of interstellar gas in spiral galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of interstellar gas in spiral galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1316254