File Download
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1103/PhysRevD.71.084026
- Scopus: eid_2-s2.0-18444382946
- WOS: WOS:000228765800064
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Dynamical instability of fluid spheres in the presence of a cosmological constant
Title | Dynamical instability of fluid spheres in the presence of a cosmological constant |
---|---|
Authors | |
Keywords | Physics - nuclear physics |
Issue Date | 2005 |
Publisher | American Physical Society. The Journal's web site is located at http://prd.aps.org |
Citation | Physical Review D (Particles, Fields, Gravitation and Cosmology), 2005, v. 71 n. 8, article no. 084026 How to Cite? |
Abstract | The equations describing the adiabatic, small radial oscillations of general relativistic stars are generalized to include the effects of a cosmological constant. The generalized eigenvalue equation for the normal modes is used to study the changes in the stability of the homogeneous sphere induced by the presence of the cosmological constant. The variation of the critical adiabatic index as a function of the central pressure is studied numerically for different trial functions. The presence of a large cosmological constant significantly increases the value of the critical adiabatic index. The dynamical stability condition of the homogeneous star in the Schwarzschild–de Sitter geometry is obtained and several bounds on the maximum allowable value for a cosmological constant are derived from stability considerations. |
Persistent Identifier | http://hdl.handle.net/10722/43154 |
ISSN | 2014 Impact Factor: 4.643 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Bohmer, CG | en_HK |
dc.contributor.author | Harko, TC | en_HK |
dc.date.accessioned | 2007-03-23T04:40:15Z | - |
dc.date.available | 2007-03-23T04:40:15Z | - |
dc.date.issued | 2005 | en_HK |
dc.identifier.citation | Physical Review D (Particles, Fields, Gravitation and Cosmology), 2005, v. 71 n. 8, article no. 084026 | - |
dc.identifier.issn | 1550-7998 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/43154 | - |
dc.description.abstract | The equations describing the adiabatic, small radial oscillations of general relativistic stars are generalized to include the effects of a cosmological constant. The generalized eigenvalue equation for the normal modes is used to study the changes in the stability of the homogeneous sphere induced by the presence of the cosmological constant. The variation of the critical adiabatic index as a function of the central pressure is studied numerically for different trial functions. The presence of a large cosmological constant significantly increases the value of the critical adiabatic index. The dynamical stability condition of the homogeneous star in the Schwarzschild–de Sitter geometry is obtained and several bounds on the maximum allowable value for a cosmological constant are derived from stability considerations. | en_HK |
dc.format.extent | 154609 bytes | - |
dc.format.extent | 122136 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.format.mimetype | application/pdf | - |
dc.language | eng | en_HK |
dc.publisher | American Physical Society. The Journal's web site is located at http://prd.aps.org | en_HK |
dc.relation.ispartof | Physical Review D (Particles, Fields, Gravitation and Cosmology) | - |
dc.rights | Copyright 2005 by The American Physical Society. This article is available online at https://doi.org/10.1103/PhysRevD.71.084026 | - |
dc.subject | Physics - nuclear physics | en_HK |
dc.title | Dynamical instability of fluid spheres in the presence of a cosmological constant | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1550-7998&volume=71&issue=8&spage=084026:1&epage=9&date=2005&atitle=Dynamical+instability+of+fluid+spheres+in+the+presence+of+a+cosmological+constant | en_HK |
dc.description.nature | published_or_final_version | en_HK |
dc.identifier.doi | 10.1103/PhysRevD.71.084026 | en_HK |
dc.identifier.scopus | eid_2-s2.0-18444382946 | - |
dc.identifier.hkuros | 100849 | - |
dc.identifier.volume | 71 | - |
dc.identifier.issue | 8 | - |
dc.identifier.spage | article no. 084026 | - |
dc.identifier.epage | article no. 084026 | - |
dc.identifier.isi | WOS:000228765800064 | - |
dc.identifier.issnl | 1550-2368 | - |