In this paper we compute the effective magnetic moment of neutrinos propagating in dense high magnetized medium. Taking typical values of magnetic field and densities of astrophysical objects (such as the cores of supernovae and neutron stars) we obtain an effective type of dipole magnetic moment in agreement with astrophysical and cosmological bounds.

En el artículo se calcula el momento magnético efectivo de los neutrinos que se propagan en un medio denso y altamente magnetizado. Para ello se tomaron valores típicos del campo magnético y densidades presentes en objetos astrofísicos, tales como núcleos de supernovas y estrellas neutrónicas. Bajo estas condiciones se obtiene un valor para el momento magnético efectivo que se corresponde con las cotas astrofísicas y cosmológicas aceptadas en la literatura.

It is suggested a general mechanism through which a lambda-type behavior is produced in the specific heat of a Bose gas near the critical temperature Tc . It is essential that the quasiparticle spectra have a gap proportional to the condensate. It works for a general class of quasiparticle spectra, and in particular, for the weakly interacting Bose gas. The introduction of a chemical potential in the theory is briefly discussed.