Astrophysics and Space Science

, Volume 133, Issue 1, pp 45–58 | Cite as

Observations and analysis of CF Tuc

  • E. Budding
  • E. McLaughlin


RecentUBV photometry of the RS CVn binary CF Tuc is discussed and analysed. If we combine the results with previously published spectroscopy we find radii of 1.63R for the hotter (∼6000 K) and 3.11R for the cooler (∼4500 K) component; both stars having a mass of about 1.3M. The distance to the system is put at 86±15 pc.

Though the photometric data is incomplete in the coverage of some regions out of the minima, there is no significant evidence of the ‘wave-type distortions’ — a known hallmark of RS CVn stars — and the data can be modeled by a standard eclipsing binary system in which the statistical test of goodness-of-fit (χ2) produces quite acceptable values for reasonable estimates of observational accuracy (≲0.01 mag). We, therefore, have no need to postulate any additional photometric complications, and feel entitled to some confidence in the reliability of the derived parameter set.


Spectroscopy Binary System Reasonable Estimate Significant Evidence Photometric Data 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© D. Reidel Publishing Company 1987

Authors and Affiliations

  • E. Budding
    • 1
  • E. McLaughlin
    • 2
  1. 1.Carter ObservatoryWellingtonNew Zealand
  2. 2.New Zealand Meteorological ServiceWellingtonNew Zealand

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