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Observable effects of dust formation in dynamic atmospheres of M-type Mira variables

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. 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1111/j.1365-2966.2006.10064.xDOIArticle
https://arxiv.org/abs/astro-ph/0601383arXivDiscussion Paper
ORCID:
AuthorORCID
Ireland, M. J.0000-0002-6194-043X
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.
Funders:
Funding AgencyGrant Number
Australian Research CouncilUNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Subject Keywords:techniques: interferometric; stars: AGB and post-AGB; stars: variables: other
Issue or Number:4
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: Jason Perez
Deposited On:13 May 2011 22:04
Last Modified:10 Mar 2021 19:34

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