The role of small perturbations in the one-dimensional collapse of slightly inhomogeneous gas clouds

Details The role of small perturbations in the one-dimensional collapse of slightly inhomogeneous gas clouds The role of small perturbations in the one-dimensional collapse of slightly inhomogeneous gas clouds

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979pazh....5..648m&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 5, Dec. 1979, p. 648-652.) Soviet Astronomy Letters, vol. 5, Nov.-Dec. 1979, p. 346-348

Astronomy and Astrophysics

Astronomy

Cosmic Gases, Galactic Evolution, Gravitational Collapse, One Dimensional Flow, Pressure Effects, Small Perturbation Flow, Perturbation Theory, Relativity

Scientific paper

The concept of one-dimensional collapse in the theory of galaxy formation is discussed with reference to the conditions under which small perturbations superimposed on the original cloud could play a significant role. Constraints on the amplitude of initial perturbations and conditions for the development of small-scale shocks are analyzed. Conditions are defined under which small perturbations superimposed on a cloud collapsing in one dimension either will cause a large-scale shock not to develop at all, or will fundamentally alter the structure of the cloud before a unified shock can form. In either case sufficiently large perturbations will lead to nonlinearities during the contraction process and thus will strongly affect the structure of the objects formed as an outcome of the collapse.

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