Evolution of the Scale Factor with a Variable Cosmological Term

Details Evolution of the Scale Factor with a Variable Cosmological Term Evolution of the Scale Factor with a Variable Cosmological Term

1998-05-20

arxiv.org/abs/astro-ph/9805260v1

Phys.Rev.D58:043506,1998

Astronomy and Astrophysics

Astrophysics

29 pages, 12 figures (not included), LaTeX, uses Phys Rev D style files (revtex.cls, revtex.sty, aps.sty, aps10.sty, prabib.st

Scientific paper

10.1103/PhysRevD.58.043506

Evolution of the scale factor a(t) in Friedmann models (those with zero pressure and a constant cosmological term Lambda) is well understood, and elegantly summarized in the review of Felten and Isaacman [Rev. Mod. Phys. 58, 689 (1986)]. Developments in particle physics and inflationary theory, however, increasingly indicate that Lambda ought to be treated as a dynamical quantity. We revisit the evolution of the scale factor with a variable Lambda-term, and also generalize the treatment to include nonzero pressure. New solutions are obtained and evaluated using a variety of observational criteria. Existing arguments for the inevitability of a big bang (ie., an initial state with a=0) are substantially weakened, and can be evaded in some cases with Lambda_0 (the present value of Lambda) well below current experimental limits.

Affiliated with

Also associated with

No associations

Rating

Evolution of the Scale Factor with a Variable Cosmological Term 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 Evolution of the Scale Factor with a Variable Cosmological Term, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of the Scale Factor with a Variable Cosmological Term will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-497934