Modelling gas and dust around carbon stars in the Large Magellanic Cloud
Abstract
In order to investigate the effect of dust production on the molecular absorption, we model the dust continuum and the 7.5 and 13.7 μm acetylene absorption features in the Spitzer IRS spectra of 148 carbon stars in the Large Magellanic Cloud (LMC). Our preliminary investigation does not find a strong correlation between the dust-production rate and the column density of acetylene for the LMC sample. However, we will construct more models at high optical depths and probe a larger range of dust properties for more robust results.
- Publication:
-
Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time
- Pub Date:
- December 2019
- DOI:
- 10.1017/S1743921318006944
- Bibcode:
- 2019IAUS..343..504S
- Keywords:
-
- stars: AGB and post-AGB;
- stars: mass loss;
- (stars:) circumstellar matter;
- radiative transfer