Dynamical opacity-sampling models of Mira variables - II. Time-dependent atmospheric structure and observable properties of four M-type model series
Abstract
We present four model series of the CODEX dynamical opacity-sampling models of Mira variables with solar abundances, designed to have parameters similar to o Cet, R Leo and R Cas. We demonstrate that the CODEX models provide a clear physical basis for the molecular shell scenario used to explain interferometric observations of Mira variables. We show that these models generally provide a good match to photometry and interferometry at wavelengths between the near-infrared and the radio, and make the model outputs publicly available. These models also demonstrate that, in order to match visible and infrared observations, the Fe-poor silicate grains that form within 3 continuum radii must have small grain radii and therefore cannot drive the winds from O-rich Mira variables.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- November 2011
- DOI:
- 10.1111/j.1365-2966.2011.19469.x
- arXiv:
- arXiv:1107.3619
- Bibcode:
- 2011MNRAS.418..114I
- Keywords:
-
- stars: AGB and post-AGB;
- stars: atmospheres;
- stars: mass-loss;
- stars: variables: general;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 16 pages, 18 figures, accepted for MNRAS