Atmospheric structure and mass loss in Miras
- Author(s)
- Kenneth H. Hinkle, Thomas Lebzelter, Oscar Straniero
- Abstract
The cool molecular region of late-type stellar atmospheres, the 'MOLsphere' located between the photosphere and expanding circumstellar shell, is explored by using time series of near-IR spectra of one large amplitude AGB (Mira) variable. The ∼1400 K MOLsphere of the Mira R Cas is shown to undergo large amplitude velocity changes that are aperiodic with time scales many times longer than the photospheric pulsation. The mass of the MOLsphere is ∼3×10
-5 M
o. Initial analysis suggests that MOLsphere is thin compared to the stellar radius.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Osservatorio Astronomico di Collurania-Teramo, National Optical Astronomy Observatory, Tucson
- Journal
- Journal of Physics: Conference Series
- Volume
- 728
- No. of pages
- 4
- ISSN
- 1742-6588
- DOI
- https://doi.org/10.1088/1742-6596/728/2/022003
- Publication date
- 07-2016
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Keywords
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/461372c4-d420-4f93-94b6-3dca2fe075ec