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The neutrino spin-flavor conversion of \bar\nu_e and \nu_\mu which is inducedby the interaction of the Majorana neutrino magnetic moment and magnetic fieldsin the collapse-driven supernova is investigated in detail. We calculate theconversion probability by using the latest precollapse models of Woosley andWeaver (1995), and also those of Nomono and Hashimoto (1988), changing thestellar mass and metallicity in order to estimate the effect of theastrophysical uncertainties. Contour maps of the conversion probability aregiven for all the models as a function of neutrino mass squared difference andthe neutrino magnetic moment times magnetic fields. It is shown that in thesolar metallicity models some observational effects are expected with \Deltam^2 = 10^{-5}--10^{-1} [eV^2] and \mu_\nu >~ 10^{-12} (10^9 G / B_0) [\mu_B],where B_0 is the strength of the magnetic fields at the surface of the ironcore. We also find that although the dependence on the stellar models orstellar mass is not so large, the metallicity of precollapse stars hasconsiderable effects on this conversion. Such effects may be seen in asupernova in the Large or Small Magellanic Clouds, and should be taken intoaccount when one considers an upper bound on \mu_\nu from the SN1987A data.Comment: 19 pages, LaTeX, using revtex. To appear in Phys. Rev. D. 16 figures  attatche

Resonant spin-flavor conversion of supernova neutrinos and deformation of the electron antineutrino spectrum