Cosmic acceleration and extra dimensions: constraints on modifications of the Friedmann equation

Details Cosmic acceleration and extra dimensions: constraints on modifications of the Friedmann equation Cosmic acceleration and extra dimensions: constraints on modifications of the Friedmann equation

2004-04-20

arxiv.org/abs/astro-ph/0404402v1

Mon.Not.Roy.Astron.Soc. 356 (2005) 475-479

Astronomy and Astrophysics

Astrophysics

7 pages, 7 figures

Scientific paper

10.1111/j.1365-2966.2004.08466.x

An alternative to dark energy as an explanation for the present phase of accelerated expansion of the Universe is that the Friedmann equation is modified, e.g. by extra dimensional gravity, on large scales. We explore a natural parametrization of a general modified Friedmann equation, and find that the present supernova type Ia and cosmic microwave background data prefer a correction of the form 1/H over a cosmological constant. We also explore the constraints that can be expected in the future, and find that there are good prospects for distinguishing this model from the standard cosmological constant to very high significance if one combines supernova data with a precise measurement of the matter density.

Affiliated with

Also associated with

No associations

Rating

Cosmic acceleration and extra dimensions: constraints on modifications of the Friedmann equation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cosmic acceleration and extra dimensions: constraints on modifications of the Friedmann equation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmic acceleration and extra dimensions: constraints on modifications of the Friedmann equation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-17812