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Title:		Gravitational instability - The second approximation in the linear long-wave theory
Authors:		ZELDOVICH, IA. B.
Affiliation:		AA(Akademiia Nauk SSSR, Institut Prikladnoi Matematiki, Moscow, USSR)
Journal:		(Astronomicheskii Zhurnal, vol. 59, July-Aug. 1982, p. 636-638) Soviet Astronomy (ISSN 0038-5301), vol. 26, July-Aug. 1982, p. 389, 390. Translation.
Publication Date:		08/1982
Category:		Astrophysics
Origin:		STI
NASA/STI Keywords:		GRAVITATIONAL COLLAPSE, JEANS THEORY, PERTURBATION THEORY, GREEN'S FUNCTIONS, PRESSURE GRADIENTS, STEADY STATE
Bibliographic Code:		1982SvA....59..636Z

Abstract

An analytic expression is given to describe the growing mode in the linear gravitational-instability theory. This expression takes into account the pressure gradient arising in a medium with density perturbations: the gradient introduces a small correction for wavelengths in excess of the critical Jeans value.

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