Characterizing the Peak in the CMB Angular Power Spectrum

Details Characterizing the Peak in the CMB Angular Power Spectrum Characterizing the Peak in the CMB Angular Power Spectrum

2000-02-08

arxiv.org/abs/astro-ph/0002162v1

Phys.Rev.Lett. 85 (2000) 1366-1369

Astronomy and Astrophysics

Astrophysics

4 pages, submitted to PRL

Scientific paper

10.1103/PhysRevLett.85.1366

A peak has been unambiguously detected in the cosmic microwave background (CMB) angular spectrum. Here we characterize its properties with fits to phenomenological models. We find that the TOCO and BOOM/NA data determine the peak location to be in the range 175--243 and 151--259 respectively (both ranges 95% confidence) and determine the peak amplitude to be between ~70 and 90 micro Kelvin. By combining all the data, we constrain the full-width at half-maximum to be between 180 and 250 at 95% confidence. Such a peak is consistent with inflation-inspired flat, cold dark matter plus cosmological constant models of structure formation with adiabatic, nearly scale-invariant initial conditions. It is inconsistent with open and defect models.

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