HLEDÍK, Stanislav and Zdeněk STUCHLÍK. Radial pulsations and dynamical stability of spherically symmetric perfect fluid configurations in spacetimes with a nonzero cosmological constant. In Proceedings of RAGtime 6/7: Workshops on black holes and neutron stars. Opava: Slezská univerzita v Opavě, Filozoficko-přírodovědecká fakulta, Ústav fyziky, 2005, p. 209-222, 13 pp. ISBN 80-7248-334-X.
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Basic information
Original name Radial pulsations and dynamical stability of spherically symmetric perfect fluid configurations in spacetimes with a nonzero cosmological constant
Authors HLEDÍK, Stanislav and Zdeněk STUCHLÍK.
Edition Opava, Proceedings of RAGtime 6/7: Workshops on black holes and neutron stars, p. 209-222, 13 pp. 2005.
Publisher Slezská univerzita v Opavě, Filozoficko-přírodovědecká fakulta, Ústav fyziky
Other information
Original language English
Type of outcome Proceedings paper
Field of Study 10308 Astronomy
Confidentiality degree is not subject to a state or trade secret
Organization unit Faculty of Philosophy and Science in Opava
ISBN 80-7248-334-X
Keywords in English spherically symmetric configurations, perfect fluid, radial pulsations, cosmological constant
Tags FÚ, MSM4781305903, sbornik
Tags International impact
Links MSM4781305903, plan (intention).
Changed by Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 8/12/2020 13:35.
Abstract
The equation governing small radial oscillations and the related Sturm--Liouville eigenvalue equation for eigenmodes of the oscillations are determined for spherically symmetric configurations of perfect fluid in spacetimes with a nonzero cosmological constant. The Sturm--Liouville equation is then applied in the cases of spherically symmetric configurations with uniform distribution of energy density and polytropic spheres. It is shown that a repulsive cosmological constant rises the critical adiabaticindex and decreases the critical radius under which the dynamical instability occurs.
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