Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.577..359f&link_type=abstract
In: Proceedings of the dusty and molecular universe: a prelude to Herschel and ALMA, 27-29 October 2004, Paris, France. Ed. by A
Astronomy and Astrophysics
Astrophysics
Ism: Dust
Scientific paper
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 amount 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 < 5 Msolar are the main source of dust.
Falceta-Goncalves Diego
Jatenco-Pereira Vera
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