Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-11-21
Mon.Not.Roy.Astron.Soc.324:977,2001
Astronomy and Astrophysics
Astrophysics
11 pages (LaTeX, mn.sty) incl. 9 eps figs; small changes to match version accepted for publication in MNRAS
Scientific paper
10.1046/j.1365-8711.2001.04373.x
Adams et al. (1997b) have noted that according to our current understanding of the unification of fundamental interactions, there should have been phase transitions associated with spontaneous symmetry breaking {\em during} the inflationary era. This may have resulted in the breaking of scale-invariance of the primordial density perturbation for brief periods. A possible such feature was identified in the power spectrum of galaxy clustering in the APM survey at the scale $k \sim 0.1 h$ Mpc^{-1} and it was shown that the secondary acoustic peaks in the power spectrum of the CMB anisotropy should consequently be suppressed. We demonstrate that this prediction is confirmed by the recent Boomerang and Maxima observations, which favour a step-like spectral feature in the range $k \sim (0.06-0.6)h$ Mpc^{-1}, independently of the similar previous indication from the APM data. Such a spectral break enables an excellent fit to both APM and CMB data with a baryon density consistent with the BBN value. It also allows the possibility of a matter-dominated universe with zero cosmological constant, which we show can now account for even the evolution of the abundance of rich clusters.
Barriga Jose
Gaztanaga Enrique
Santos Mario
Sarkar Subir
No associations
LandOfFree
On the APM power spectrum and the CMB anisotropy: Evidence for a phase transition during inflation? 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 On the APM power spectrum and the CMB anisotropy: Evidence for a phase transition during inflation?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the APM power spectrum and the CMB anisotropy: Evidence for a phase transition during inflation? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-590660