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Article: Modified gravity with arbitrary coupling between matter and geometry

TitleModified gravity with arbitrary coupling between matter and geometry
Authors
Issue Date2008
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/physletb
Citation
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2008, v. 669 n. 5, p. 376-379 How to Cite?
AbstractThe field equations of a generalized f (R) type gravity model, in which there is an arbitrary coupling between matter and geometry, are obtained. The equations of motion for test particles are derived from a variational principle in the particular case in which the Lagrange density of the matter is an arbitrary function of the energy-density of the matter only. Generally, the motion is non-geodesic, and takes place in the presence of an extra force orthogonal to the four-velocity. The Newtonian limit of the model is also considered. The perihelion precession of an elliptical planetary orbit in the presence of an extra force is obtained in a general form, and the magnitude of the extra gravitational effects is constrained in the case of a constant extra force by using Solar System observations. © 2008 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/91879
ISSN
2015 Impact Factor: 4.787
2015 SCImago Journal Rankings: 3.186
ISI Accession Number ID
Funding AgencyGrant Number
RGC grant of the government of the Hong Kong SAR
Funding Information:

I would like to thank to the anonymous referee, whose comments and suggestions helped me to significantly improve the manuscript. This work is supported by an RGC grant of the government of the Hong Kong SAR.

References

 

DC FieldValueLanguage
dc.contributor.authorHarko, Ten_HK
dc.date.accessioned2010-09-17T10:29:16Z-
dc.date.available2010-09-17T10:29:16Z-
dc.date.issued2008en_HK
dc.identifier.citationPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2008, v. 669 n. 5, p. 376-379en_HK
dc.identifier.issn0370-2693en_HK
dc.identifier.urihttp://hdl.handle.net/10722/91879-
dc.description.abstractThe field equations of a generalized f (R) type gravity model, in which there is an arbitrary coupling between matter and geometry, are obtained. The equations of motion for test particles are derived from a variational principle in the particular case in which the Lagrange density of the matter is an arbitrary function of the energy-density of the matter only. Generally, the motion is non-geodesic, and takes place in the presence of an extra force orthogonal to the four-velocity. The Newtonian limit of the model is also considered. The perihelion precession of an elliptical planetary orbit in the presence of an extra force is obtained in a general form, and the magnitude of the extra gravitational effects is constrained in the case of a constant extra force by using Solar System observations. © 2008 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/physletben_HK
dc.relation.ispartofPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physicsen_HK
dc.titleModified gravity with arbitrary coupling between matter and geometryen_HK
dc.typeArticleen_HK
dc.identifier.emailHarko, TC:harko@hkucc.hku.hken_HK
dc.identifier.authorityHarko, TC=rp1333en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.physletb.2008.10.007en_HK
dc.identifier.scopuseid_2-s2.0-55649097606en_HK
dc.identifier.hkuros242353-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-55649097606&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume669en_HK
dc.identifier.issue5en_HK
dc.identifier.spage376en_HK
dc.identifier.epage379en_HK
dc.identifier.isiWOS:000261631800023-

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