D
2005
Radial pulsations and dynamical stability of spherically symmetric perfect fluid configurations in spacetimes with a nonzero cosmological constant
HLEDÍK, Stanislav and Zdeněk STUCHLÍK
Basic information
Original name
Radial pulsations and dynamical stability of spherically symmetric perfect fluid configurations in spacetimes with a nonzero cosmological constant
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
Type of outcome
Stať ve sborníku
Field of Study
10308 Astronomy
Confidentiality degree
není předmětem státního či obchodního tajemství
Organization unit
Faculty of Philosophy and Science in Opava
Keywords in English
spherically symmetric configurations, perfect fluid, radial pulsations, cosmological constant
Tags
International impact
Links
MSM4781305903, plan (intention).
V originále
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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