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We consider a double-inflationary model with two massive scalar fields interacting only gravitationally in the context of a flat cold dark matter (CDM) universe. The cosmic microwave background temperature anisotropies produced in this theory are investigated in great detail for a window of parameters where the density fluctuation power spectrum $P(k)$ is in good agreement with observations. The first Doppler (``acoustic'') peak is a crucial test for this model as well as for other models. For values of the cosmological parameters close to those of standard CDM, our model is excluded if the height of the Doppler peak is sensibly higher than about three times the Sachs-Wolfe plateau.
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Lesgourgues et al. (1997) studied this question.
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