Journal Article

Is there a flatness problem in classical cosmology?

Phillip Helbig

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 421, issue 1, pages 561-569
Published in print March 2012 | ISSN: 0035-8711
Published online March 2012 | e-ISSN: 1365-2966 | DOI:
Is there a flatness problem in classical cosmology?

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I briefly review the flatness problem within the context of classical cosmology and examine some of the debate in the literature with regard to its definition and even the question whether it exists. I then present some new calculations for cosmological models which will collapse in the future; together with previous work by others for models which will expand forever, this allows one to examine the flatness problem quantitatively for all cosmological models. This leads to the conclusion that the flatness problem does not exist, not only for the cosmological models corresponding to the currently popular values of λ0 and Ω0 but indeed for all Friedmann–Lemaître models.

Keywords: cosmological parameters; cosmology: theory

Journal Article.  7837 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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