Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.5804w&link_type=abstract
American Astronomical Society Meeting 205, #58.04; Bulletin of the American Astronomical Society, Vol. 36, p.1438
Astronomy and Astrophysics
Astronomy
Scientific paper
Is there any dependence of the stellar dust-production rate on the average metallicity of the medium from which the stars were formed? In an attempt to answer this question, we developed a technique to find dust-generating or dust-embedded stars using the recently compiled 2MASS point source catalogue. Constructing color-color and magnitude-color diagrams from the filtered 2MASS data, we have been able to detect luminous dust- generating sources in some Local Group galaxies, the Milky Way inclusive. We have been able to separate, to some extent, the dust producers from the highly reddened, main-sequence stars. Our selection criteria practically eliminate ``conventional" AGB dust sources. Once completed, this census will produce a comprehensive list of the galactic and extra-galactic luminous dust-producing/embedded sources. Preliminary examination of M33, a galaxy with a steep metallicity gradient, shows that high-metallicity regions yield more dust-producing sources.
Marchenko Sergey V.
Wood Stephen E.
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