Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Disformal vectors and anisotropies on a warped brane Hulluilla on Halvat Huvit
Stockholms universitet, Nordiska institutet för teoretisk fysik (Nordita).ORCID-id: 0000-0002-9403-8565
Antal upphovsmän: 22015 (Engelska)Ingår i: Journal of Cosmology and Astroparticle Physics, E-ISSN 1475-7516, nr 3, artikel-id 003Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The Maxwell action is conformally invariant and classically ignorant of conformally flat metrics. However, if the vector lives in a disformal metric - as it does if residing upon a moving brane - this is no longer true. The disformal coupling is then mediated by a Dirac-Born-Infeld scalar field. Here a systematic dynamical system analysis is developed for anisotropic Bianchi I cosmology with a massive disformally coupled vector field. Several new fixed points are found, including anisotropic scaling solutions. The formalism here presented can be conveniently applied to general scenarios with or without extra dimensional motivations. This is illustrated here by performing a complete analysis with the assumption that both the potentials and the warp factor for the brane are (nearly) exponential. In that case, the anisotropic fixed points are either not attractors, do not describe accelerating expansion or else they feature too large anisotropies to be compatible with observations. Nonetheless, viable classes of models exist where isotropy is retained due to rapid oscillations of the vector field, thus providing a possible realisation of disformally interacting massive dark matter.

Ort, förlag, år, upplaga, sidor
2015. nr 3, artikel-id 003
Nyckelord [en]
gravity, cosmology of theories beyond the SM, cosmology with extra dimensions, string theory and cosmology
Nationell ämneskategori
Astronomi, astrofysik och kosmologi
Identifikatorer
URN: urn:nbn:se:su:diva-119013DOI: 10.1088/1475-7516/2015/03/003ISI: 000355633800003OAI: oai:DiVA.org:su-119013DiVA, id: diva2:843292
Tillgänglig från: 2015-07-28 Skapad: 2015-07-24 Senast uppdaterad: 2023-03-28Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltext

Person

Koivisto, Tomi S.

Sök vidare i DiVA

Av författaren/redaktören
Koivisto, Tomi S.
Av organisationen
Nordiska institutet för teoretisk fysik (Nordita)
I samma tidskrift
Journal of Cosmology and Astroparticle Physics
Astronomi, astrofysik och kosmologi

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 47 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf