The Evolution of Inverse Power Law Quintessence at Low Redshift

Details The Evolution of Inverse Power Law Quintessence at Low Redshift The Evolution of Inverse Power Law Quintessence at Low Redshift

2003-06-18

arxiv.org/abs/astro-ph/0306364v3

Phys.Rev.D68:123524,2003

Astronomy and Astrophysics

Astrophysics

6 pages, 6 figures, new figure added, numerous clarifications

Scientific paper

10.1103/PhysRevD.68.123524

Quintessence models based on a scalar field, phi, with an inverse power law potential display simple tracking behavior at early times, when the quintessence energy density, rho_phi, is sub-dominant. At late times, when rho_phi becomes comparable to the matter density, the evolution of phi diverges from its scaling behavior. We calculate the first order departure of phi from its tracker solution at low redshift. Our results for the evolution of phi, rho_phi, Omega_phi, and w are suprisingly accurate even down to z=0. We find that w and Omega_phi are related linearly to first order. We also derive a semi-analytic expression for w(z) which is accurate to within a few percent. Our analytic techniques are potentially applicable to any quintessence model in which the quintessence component comes to dominate at late times.

Affiliated with

Also associated with

No associations

Rating

The Evolution of Inverse Power Law Quintessence at Low Redshift 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 The Evolution of Inverse Power Law Quintessence at Low Redshift, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Evolution of Inverse Power Law Quintessence at Low Redshift will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-51462