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Open Astronomy

formerly Baltic Astronomy

Editor-in-Chief: Barbuy, Beatriz

IMPACT FACTOR 2018: 0.350

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ICV 2017: 121.03

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Volume 21, Issue 1-2


RR Tel: Determination of Dust Properties During Minimum Obscuration

T. Jurkić
  • Corresponding author
  • Physics Department, University of Rijeka, Omladinska 14, HR-51000 Rijeka, Croatia
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ D. Kotnik-Karuza
Published Online: 2017-03-23 | DOI: https://doi.org/10.1515/astro-2017-0366


the ISO infrared spectra and the SAAO long-term JHKL photometry of RR Tel in the epochs during minimum obscuration are studied in order to construct a circumstellar dust model. the spectral energy distribution in the near- and the mid-IR spectral range (1–15 μm) was obtained for an epoch without the pronounced dust obscuration. the DUSTY code was used to solve the radiative transfer through the dust and to determine the circumstellar dust properties of the inner dust regions around the Mira component. Dust temperature, maximum grain size, dust density distribution, mass-loss rate, terminal wind velocity and optical depth are determined. the spectral energy distribution and the long-term JHKL photometry during an epoch of minimum obscuration show almost unattenuated stellar source and strong dust emission which cannot be explained by a single dust shell model. We propose a two-component model consisting of an optically thin circmustellar dust shell and optically thick dust outside the line of sight in some kind of a flattened geometry, which is responsible for most of the observed dust thermal emission.

Keywords: stars; binaries; symbiotic; stars; circumstellar matter; stars; AGB and post-AGB; radiative transfer


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About the article

Received: 2011-09-10

Revised: 2012-03-25

Accepted: 2012-03-30

Published Online: 2017-03-23

Published in Print: 2012-06-01

Citation Information: Open Astronomy, Volume 21, Issue 1-2, Pages 123–130, ISSN (Online) 2543-6376, DOI: https://doi.org/10.1515/astro-2017-0366.

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© 2017. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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