Testing Cold Dark Matter Models Using Hubble Flow Variations

Details Testing Cold Dark Matter Models Using Hubble Flow Variations Testing Cold Dark Matter Models Using Hubble Flow Variations

1998-01-13

arxiv.org/abs/astro-ph/9801107v1

Astronomy and Astrophysics

Astrophysics

8 pages, 10 figures, submitted to MNRAS

Scientific paper

10.1046/j.1365-8711.1999.02430.x

COBE-normalized flat (matter plus cosmological constant) and open Cold Dark Matter (CDM) models are tested by comparing their expected Hubble flow variations and the observed variations in a Type Ia supernova sample and a Tully Fisher cluster sample. The test provides a probe of the CDM power spectrum on scales of $0.02h$ Mpc$^{-1}\la k\la 0.2h$ Mpc$^{-1}$, free of the bias factor $b$. The results favor a low matter content universe, or a flat matter-dominated universe with a very low Hubble constant and/or a very small spectral index $n_{ps}$, with the best fits having $\Omega_0\sim 0.3$ to 0.4. The test is found to be more discriminative to the open CDM models than to the flat CDM models. For example, the test results are found to be compatible with those from the X-ray cluster abundance measurements at smaller length scales, and consistent with the galaxy and cluster correlation analysis of Peacock and Dodds (1994) at similar length scales, if our universe is flat; but the results are marginally incompatible with the X-ray cluster abundance measurements if our universe is open. The open CDM results are consistent with that of Peacock and Dodds only if the matter density of the universe is less than about 60% of the critical density. The shortcoming of the test is discussed, so are ways to minimize it.

Affiliated with

Also associated with

No associations

Rating

Testing Cold Dark Matter Models Using Hubble Flow Variations 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 Testing Cold Dark Matter Models Using Hubble Flow Variations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Testing Cold Dark Matter Models Using Hubble Flow Variations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-644120