Constraining the cosmic equation of state from old galaxies at high redshift

Details Constraining the cosmic equation of state from old galaxies at high redshift Constraining the cosmic equation of state from old galaxies at high redshift

2000-05-22

arxiv.org/abs/astro-ph/0005441v3

Mon.Not.Roy.Astron.Soc. 317 (2000) 893

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure, MNRAS

Scientific paper

10.1046/j.1365-8711.2000.03695.x

New limits on the cosmic equation of state are derived from age measurements of three recently reported old high redshift galaxies (OHRG). The results are based on a flat FRW type cosmological model driven by nonrelativistic matter plus a smooth component parametrized by its equation of state $p_{x} = \omega\rho_{x}$ ($\omega \geq -1$). The range of $\omega$ is strongly dependent on the matter density parameter. For $\Omega_{M} \sim 0.3$, as indicated from dynamical measurements, the age estimates of the OHRG restricts the cosmic parameter to $\omega\leq - 0.27$. However, if $\Omega_{M}$ is the one suggested by some studies of field galaxies, i.e, $\Omega_{M} \simeq 0.5$, only a cosmological constant ($\omega=-1$) may be compatible with these data.

Affiliated with

Also associated with

No associations

Rating

Constraining the cosmic equation of state from old galaxies at high 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 Constraining the cosmic equation of state from old galaxies at high redshift, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraining the cosmic equation of state from old galaxies at high redshift will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-472972