2000/09/11 by Toshifumi Futamase, Masahiro Takada, Futamase, Toshifumi +1
Computer Science · Physics and Astronomy · #Astronomy and Astrophysical Research #Computational Physics and Python Applications #Cosmology and Gravitation Theories #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0009153
4 pages; Revtex; 2 figures included
arxiv created 2000/09/11 · arxiv updated 2009/12/01
We investigate the dependence of cosmological parameters on the number count of peaks (local maxima and minima) in the cosmic microwave background (CMB) sky. The peak statistics contains the whole information of acoustic oscillations in the angular power spectrum Cl over l-space and thus it can place complementary constraints on the cosmological parameters to those obtained from measurements of Cl. Based on the instrumental specifications of Planck, we find that the number count of peaks can provide new constraints on the combination of the matter density Ω\rm m and the Hubble parameter h approximately scaled as Ω\rm m h-4.9 for a flat ΛCDM model with Ωm=0.3 and h=0.7. Therefore, we suggest that combining it with the constraints from Cl scaled as Ωmh3.8 (or commonly Ω\rm mh2) can potentially determine Ω\rm m or equivalently solve the cosmic degeneracy by the CMB data alone.