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The discovery of the microwave background anisotropy by the Cosmic Background Explorer (COBE) satellite is in accord with the inflationary scenario. For five promising models involving a single scalar field, the coupling constants and the fluctuation spectra are calculated including a correction for gravitational radiation. The primordial density fluctuation spectrum computed from these models is not exactly scale-invariant; the spectral index is constrained to be n0. 8 for inflation with an exponential potential (assuming that the biasing parameter for galaxies b_2). The implications for biased galaxy formation scenarios are discussed.
D. S. Salopek (Mon,) studied this question.
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