Astrophysics and Space Science

, Volume 73, Issue 2, pp 389–394 | Cite as

Revised photometric elements of the eclipsing binary TW Dra

  • G. Giuricin
  • F. Mardirossian
  • F. Predolin


The photoelectric light curves of TW Dra obtained by Baglow (1952) and by Walter (1978) have been re-analysed by means of Wood's (1972) model in order to obtain accurate photometric elements. Significantly different elements have resulted from the two sets of observations, but more confidence can be given to the elements deduced from Walter's (1978) data. Radii and luminosities have been computed with the aid of Popper's (1978) new values for masses.

TW Dra is confirmed to be a typical sd-system, having a distinctly oversized and overluminous secondary. Interestingly, the primary appears to be slightly more luminous than expected for a Main-Sequences star, in agreement with theoretical predictions for present primaries of massexchange binaries systems.


Theoretical Prediction Light Curf Present Primary Photometric Element Photoelectric Light Curf 
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 Co 1980

Authors and Affiliations

  • G. Giuricin
    • 1
  • F. Mardirossian
    • 1
  • F. Predolin
    • 1
  1. 1.Osservatorio Astronomico di TriesteTriesteItaly

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