ACDM cosmology with a quiescent anisotropy in a higher dimensional steady state universe

Ozgur Akarsu, Tekin Dereli, Nihan Katlrcl

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)

Abstract

In this work, which follows a series of studies on the higher-dimensional steady state universe idea and prepared for Professor Tekin Dereli's Festschrift, we show the infuence of the dynamical internal (unobservable) space on the evolution of the possible anisotropy of the external (observable) space. We obtain mathematically exactly the same Friedmann equation of the standard ΛCDM model for the external space, but with some remarkable physical diferences. In particular, the higher-dimensional negative cosmological constant plays the role of the four-dimensional positive cosmological constant and the expansion anisotropy, viz., the shear scalar, of the external space mimics a negative cosmological constant; it would mimic a stif fuid when allowed on top of the standard ΛCDM model. This latter feature gives us the opportunity to manipulate the CMB quadrupole temperature fuctuation, suggesting a possible answer to the fact that its observed value is lower than that predicted by the standard ΛCDM model.

Original languageEnglish
Article number012001
JournalJournal of Physics: Conference Series
Volume2191
Issue number1
DOIs
Publication statusPublished - 10 Feb 2022
EventA Life in Mathematical Physics: Conference in Honour of Tekin Dereli, DERELI-FS 2021 - Virtual, Online
Duration: 26 Nov 202128 Nov 2021

Bibliographical note

Publisher Copyright:
© 2021 Published under licence by IOP Publishing Ltd.

Fingerprint

Dive into the research topics of 'ACDM cosmology with a quiescent anisotropy in a higher dimensional steady state universe'. Together they form a unique fingerprint.

Cite this