Jump to ContentJump to Main Navigation
Show Summary Details
More options …

Open Astronomy

formerly Baltic Astronomy

Editor-in-Chief: Barbuy, Beatriz


IMPACT FACTOR 2018: 0.350

CiteScore 2018: 0.24

SCImago Journal Rank (SJR) 2018: 0.202
Source Normalized Impact per Paper (SNIP) 2018: 0.144

ICV 2017: 121.03

Open Access
Online
ISSN
2543-6376
See all formats and pricing
More options …
Volume 21, Issue 1-2

Issues

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

Abstract

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

References

  • Carter B. S. 1990, MNRAS, 242, 1Google Scholar

  • Danchi W. C., Bester M., Degiacomi C. G., Greenhill L. J., Townes C. H. 1994, AJ, 107, 1469Google Scholar

  • Glass I. S. 1973, MNRAS, 164, 155Google Scholar

  • Ivezić Ž., Elitzur M. 1997, MNRAS, 287, 799Google Scholar

  • Ivezić Ž., Nenkova M., Elitzur M. 1999, in User Manual for DUSTY, University of Kentucky Internal Report, http://www.pa.uky.edu/~moshe/dustyGoogle Scholar

  • Jurkić T., Kotnik-Karuza D. 2012, A&A, accepted for publishingGoogle Scholar

  • Kenyon S. J. 1986, in the Symbiotic Stars, Cambridge Univ. Press, p. 295Google Scholar

  • Kotnik-Karuza D., Friedjung M., Whitelock P. A. et al. 2006, A&A, 452, 503Google Scholar

  • Mathis J. S., Rumpl W., Nordsieck K. H. 1977, ApJ, 217, 425Google Scholar

  • Mikolajewska J., Friedjung M., Kenyon S. J., Viotti R. 1988, in the Symbiotic Phenomenon, IAU Colloq. 103, eds. J. Mikolajewska et al., Kluwer Academic Publishers, Dordrecht, p. 381Google Scholar

  • Mohamed S., Podsiadlowski Ph. 2012, Baltic Astronomy, 21, 88 (this issue)Google Scholar

  • Mohamed S., Podsiadlowski Ph. 2011, in Asymmetric Planetary Nebula 5 Conference, eds. A. A. Zijlstra et al., Jodrell Bank Centre for Astrophysics, p. 295Google Scholar

  • Muerset U., Schmid H. M. 1999, A&AS, 137, 473Google Scholar

  • Ossenkopf V., Henning Th., Mathis J. S. 1992, A&A, 261, 567Google Scholar

  • Penston M. V., Benvenuti P., Cassatella A. et al. 1983, MNRAS, 202, 833Google Scholar

  • Rieke G. H., Lebofsky M. J. 1985, ApJ, 288, 618Google Scholar

  • Sacuto S., Chesneau O., Vannier M., Cruzalebes P. 2007, A&A, 465, 469Google Scholar

  • Sacuto S., Chesneau O. 2009, A&A, 493, 1043Google Scholar

  • Vinković D., Ivezić Ž., Miroshnichenko A. S., Elitzur M. 2003, MNRAS, 346, 1151Google Scholar

  • Whitelock P. A. 1987, PASP, 99, 573Google Scholar

  • Whitelock P. A. 2003, in Symbiotic Stars Probing Stellar Evolution, eds. R. L. M. Corradi, J. Mikolajewska & T. J. Mahoney, ASP Conf. Ser., 303, 41 Google Scholar

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.

Export Citation

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

Comments (0)

Please log in or register to comment.
Log in