Peak statistics on COBE maps

Abstract

We perform the stastistics of temperature maxima and minima in COBE-DMR 2-year maps. For power-law spectra the surface distribution of peaks implies an amplitude consistent with more conventional analyses of COBE data (for instance, we get $Q_{\mathrm{rms}-\mathrm{PS}}=17\pm 3\mu$K for a spectral index but not with the measured quadrupole $Q_{\mathrm{rms}}=6\pm 3\mu$K. This provides further support for the existence an infrared cutoff in the cosmic spectrum.

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