Retrieving "Angular Power Spectrum" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Baryonic Matter Density

   Linked via "angular power spectrum"

   Cosmic Microwave Background Anisotropies
   Analysis of the angular power spectrum of the CMB provides the most precise constraints on cosmological parameters. Specifically, the relative heights of the acoustic peaks in the power spectrum are sensitive to baryonic density.
   The ratio of the first peak (the major compression phase) to the second peak (the major rarefaction phase) is directly proportional to the ratio of baryonic energy density to total …

2. Cosmic Microwave Background (cmb)

   Linked via "Angular Power Spectrum"

   While the CMB/) is remarkably uniform to one part in $10^5$, the small temperature variations ($\Delta T / T \sim 10^{-5}$) are cosmologically significant. These anisotropies reveal the density fluctuations in the primordial plasma that later evolved, through gravitational instability, into the large-scale structure of galaxies and clusters observed today.
   The primary tool for quantifying these fluctuations is the **[Angular Power Spectrum](/entries/a…