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The Solar-Type Eclipsing Binary System AI Phoenicis

Published online by Cambridge University Press:  12 April 2016

E.F. Milone  and
B.J. Hrivnak
E.F. Milone
Affiliation:
Rothney Astrophysical Observatory, The Univ. of Calgary
B.J. Hrivnak
Affiliation:
Rothney Astrophysical Observatory, The Univ. of Calgary

Extract

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AI Phe was discovered to be variable and identified as an EA binary by Strohmeier (1972). Reipurth (1978) subsequently carried out uvby photometry, determined the period (24.5923 d), and noted the lengthy totality of primary minimum and the displacement of the secondary minimum. Imbert (1978) obtained radial velocity curves and determined spectroscopic orbital elements. Imbert also gives a spectroscopic classification of G2V for the primary (hotter) component and approximately G5 for the secondary. AI Phe thus appeared to offer a unique opportunity to study the limb darkening of a non-interacting solar-type star. As an extension of a solar UV limb darkening study (Kjeldseth Moe and Milone 1978), ten IUE spectra were obtained on Aug. 12 in 2 successive shifts (cf Milone et al 1981). In conjunction with this, ground-based 5-colour photometry and spectroscopy were carried out at CTIO and at UTLCO.

Type
Session III: Observed Activity in Related Objects
Information
International Astronomical Union Colloquium , Volume 71: Activity in Red-Dwarf Stars , 1983 , pp. 407 - 408
Copyright
Copyright © Reidel 1983

References

REFERENCES

Imbert, H. 1979, Astron. Astrophys. Suppl. 36, 453.Google Scholar
Kjeldseth Moe, O. and Milone, E,F. 1978, Astrophys. J. 225, 301.Google Scholar
Milone, E.F., Hriynak, B.J., Clark, T.A., Kjeldseth Moe, O., Blades, J.C. and Shelton, I:. 1981, Info, Bull. Var. Stars 2060.Google Scholar
Reipurth, B. 1978, Info. Bull. var. Stars 1419.Google Scholar
Strohmeier, W. 1972, Info. Bull. var. Stars 665.Google Scholar