Cardassian Expansion:. AN Alternative to Dark Energy

Details Cardassian Expansion:. AN Alternative to Dark Energy Cardassian Expansion:. AN Alternative to Dark Energy

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003idm..conf...33l&link_type=abstract

THE IDENTIFICATION OF DARK MATTER. Proceedings of the Fourth International Workshop. Held 2 - 6 September 2002 in York, UK. Edit

Computer Science

Cosmology

Scientific paper

We discuss a modification to the Friedmann Robertson Walker equation in which the universe is flat, matter dominated, and accelerating. The Friedmann equation is generically modified in braneworld scenarios. An additional term, which contains only matter or radiation (no vacuum contribution), becomes the dominant driver of expansion at a late epoch of the universe. During the epoch when the new term dominates, the universe accelerates; we call this period of acceleration the Cardassian era. The universe can be flat and yet consist of only matter and radiation, and still be compatible with observations. The energy density required to close the universe is much smaller than in a standard cosmology, so that matter can be sufficient to provide a flat geometry. The new term required may arise, e.g., as a consequence of our observable universe living as a 3-dimensional brane in a higher dimensional universe. The Cardassian model survives several observational tests, including the cosmic background radiation, the age of the universe, the cluster baryon fraction, and structure formation.

Affiliated with

Also associated with

No associations

Rating

Cardassian Expansion:. AN Alternative to Dark Energy 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 Cardassian Expansion:. AN Alternative to Dark Energy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cardassian Expansion:. AN Alternative to Dark Energy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1001810