CMB ANISOTROPY PREDICTIONS FOR A MODEL OF DOUBLE INFLATION

We consider a double-inflationary model with two massive scalar fields interacting only gravitationally in the context of a flat cold dark m atter (CDM) universe. The cosmic microwave background temperature anis otropies 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 (''acoust ic'') peak is a crucial test for this model as well as for other model s. For values of the cosmological parameters close to those of standar d CDM, our model is excluded if the height of the Doppler peak is sens ibly higher than about three times the Sachs-Wolfe plateau. [S0556-282 1(97)02522-8].