Ireland, M. J. and Scholz, M. (2006) Observable effects of dust formation in dynamic atmospheres of M-type Mira variables. Monthly Notices of the Royal Astronomical Society, 367 (4). pp. 1585-1593. ISSN 0035-8711. doi:10.1111/j.1365-2966.2006.10064.x. https://resolver.caltech.edu/CaltechAUTHORS:20110513-112918752
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Abstract
The formation of dust with temperature-dependent non-grey opacity is considered in a series of self-consistent model atmospheres at different phases of an O-rich Mira variable of mass 1.2 M_⊙. Photometric and interferometric properties of these models are predicted under different physical assumptions regarding the dust formation. The iron content of the initial silicate that forms and the availability of grain nuclei are found to be critical parameters that affect the observable properties. For certain plausible parameter values, dust would form at 2–3 times the average continuum photospheric radius. This work provides a consistent physical explanation for the larger apparent size of Mira variables at wavelengths shorter than 1 μm than that predicted by dust-free fundamental-mode pulsation models.
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| Additional Information: | © 2006 The Authors. Journal compilation © 2006 RAS, MNRAS. Accepted 2006 January 9. Received 2006 January 2; in original form 2005 August 9. This research was supported by the Australian Research Council and the Deutsche Forschungsgemeinschaft within the linkage project ‘Red Giants’ and by a grant of the Deutsche Forschungsgemeinschaft on ‘Time Dependence of Mira Atmospheres’.We would like to thank P. G. Tuthill and the referee P. Woitke for valuable comments on the manuscript and H. P. Gail for answering many questions about dust formation theory. | |||||||||
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| Subject Keywords: | techniques: interferometric; stars: AGB and post-AGB; stars: variables: other | |||||||||
| Issue or Number: | 4 | |||||||||
| DOI: | 10.1111/j.1365-2966.2006.10064.x | |||||||||
| Record Number: | CaltechAUTHORS:20110513-112918752 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20110513-112918752 | |||||||||
| Official Citation: | Ireland, M. J. and Scholz, M. (2006), Observable effects of dust formation in dynamic atmospheres of M-type Mira variables. Monthly Notices of the Royal Astronomical Society, 367: 1585–1593. doi: 10.1111/j.1365-2966.2006.10064.x | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 23666 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | INVALID USER | |||||||||
| Deposited On: | 13 May 2011 22:04 | |||||||||
| Last Modified: | 09 Nov 2021 16:16 |
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