ISM dust feedback from stars and remnants

One of the most interesting tasks in Astrophysics is to discover the main source of the interstellar dust, which is detected both by light extinction and polarimetry. The ISM, generally cold and rarefied has dust growth timescales higher than the time of the Universe. In this sense, it is supposed that dust may be formed in stellar environments, regardless its evolutionary phase, and ejected to the ISM. In this work we present a semi-empirical calculation of the ammount of dust that comes back to the ISM in each stellar evolutionary phase, for each initial stellar mass. For that we considered a consistent evolutionary model and a mass distribution function. As main results we show that stars of high masses are really important only in the beginning of starbust events, but in the current Galactic stage, stars with M <5M(circle dot) are the main source of dust.