Mass-loss rates and dust-to-gas ratios for obscured Asymptotic Giant Branch stars of different metallicities

1999/12/02 by Jacco Th. van Loon, van Loon, Jacco Th. · 2 citations
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/9912053

10 pages, 8 figures. Accepted for publication in A&A Main Journal

arxiv created 1999/12/02 · arxiv updated 2009/12/01

Abstract

The mass-loss rates and dust-to-gas ratios of obscured Asymptotic Giant Branch (AGB) stars are investigated for samples with different initial metallicities: in the Small and Large Magellanic Clouds (SMC & LMC) and in the Milky Way. The properties of their circumstellar envelopes can be explained in a consistent way if, both for obscured M-type AGB stars and for obscured carbon stars, the total (gas+dust) mass-loss rate depends only weakly on initial metallicity whilst the dust-to-gas ratio depends approximately linearly on initial metallicity.

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