Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.224..543g&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 224, Feb. 1, 1987, p. 543-555.
Astronomy and Astrophysics
Astronomy
24
Apsides, Cepheid Variables, Eclipsing Binary Stars, Stellar Interiors, Stellar Motions, Cygnus Constellation, Eccentricity, Light Curve, Stellar Orbits, Stellar Spectrophotometry
Scientific paper
Data from UBV photoelectric photometry of CW Cep, Y Cyg, and AG Per, obtained with the 40- and 61-cm reflecting telescopes at Yonsei University Observatory and the Korean National Astronomical Observatory during 1981-1983, are combined with published data to characterize the apsidal motion of these objects. The results are presented in tables and graphs and discussed. The apsidal period, orbital eccentricity, and log k2 (the internal-structure constant under the assumption of pseudosynchronous rotation of the binary components) for CW Cep are found to be 45.5 yr, 0.029, and -2.08, respectively. The corresponding values are 47.6 yr, 0.146, and -2.05 for Y Cyg and 76.0 yr, 0.070, and -2.27 for AG Per. These results are shown to be in better agreement with the models proposed by Jeffery (1984) than with those of Hejlesen (1980).
Gimenez Alvaro
Kim Chun-Hwey
Nha Il-Seong
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