CDM models with a BSI steplike primordial spectrum and a cosmological constant

Details CDM models with a BSI steplike primordial spectrum and a cosmological constant CDM models with a BSI steplike primordial spectrum and a cosmological constant

1997-11-12

arxiv.org/abs/astro-ph/9711139v1

Mon.Not.Roy.Astron.Soc. 297 (1998) 769-776

Astronomy and Astrophysics

Astrophysics

7 pages, 5 figures, LaTeX with mn.sty

Scientific paper

10.1046/j.1365-8711.1998.01537.x

A class of spatially-flat models with cold dark matter (CDM), a cosmological constant and a broken-scale-invariant (BSI) steplike primordial (initial) spectrum of adiabatic perturbations, generated in an exactly solvable inflationary model where the inflaton potential has a rapid change of its first derivative at some point, is confronted with existing observational data on angular fluctuations of the CMB temperature, galaxy clustering and peculiar velocities of galaxies. If we locate the step in the initial spectrum at k=0.05 h/Mpc, where some feature in the spectrum of Abell clusters of galaxies was found that could reflect a property of the initial spectrum, and if the large scales flat plateau of the spectrum is normalized according to the COBE data, the only remaining parameter of the spectrum is p - the ratio of amplitudes of the metric perturbations between the small scales and large scales flat plateaux. Allowed regions in the plane of parameters (Omega=1-Omega_Lambda, H_0) satisfying all data have been found for p lying in the region (0.8-1.7). Especially good agreement of the form of the present power spectrum in this model with the form of the cluster power spectrum is obtained for the inverted step (p<1, p=0.7-0.8), when the initial spectrum has slightly more power on small scales.

Affiliated with

Also associated with

No associations

Rating

CDM models with a BSI steplike primordial spectrum and a cosmological constant 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 CDM models with a BSI steplike primordial spectrum and a cosmological constant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CDM models with a BSI steplike primordial spectrum and a cosmological constant will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-152891