Rejuvenating the matter power spectrum: restoring information with a logarithmic density mapping

Details Rejuvenating the matter power spectrum: restoring information with a logarithmic density mapping Rejuvenating the matter power spectrum: restoring information with a logarithmic density mapping

2009-03-27

arxiv.org/abs/0903.4693v2

Astrophys.J.698:L90-L93,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

4 pages, 5 figures, accepted to ApJ Letters. Minor changes to match accepted version. Illustrative large-scale-structure sonif

Scientific paper

10.1088/0004-637X/698/2/L90

We find that nonlinearities in the dark-matter power spectrum are dramatically smaller if the density field first undergoes a logarithmic mapping. In the Millennium simulation, this procedure produces a power spectrum with a shape hardly departing from the linear power spectrum for k <~ 1 h/Mpc at all redshifts. Also, this procedure unveils pristine Fisher information on a range of scales reaching a factor of 2-3 smaller than in the standard power spectrum, yielding 10 times more cumulative signal-to-noise at z=0.

Affiliated with

Also associated with

No associations

Rating

Rejuvenating the matter power spectrum: restoring information with a logarithmic density mapping 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 Rejuvenating the matter power spectrum: restoring information with a logarithmic density mapping, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rejuvenating the matter power spectrum: restoring information with a logarithmic density mapping will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-20934