Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988acaps...8...99l&link_type=abstract
(Acta Astrophysica Sinica, vol. 8, 1988, p. 99-103) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 12, Sept. 1988, p.
Astronomy and Astrophysics
Astrophysics
Astronomical Spectroscopy, Binary Stars, Radial Velocity, Circular Orbits, Electrophotometry
Scientific paper
23 observations of the single-spectrum binary θ Dra, F8 IV, were secured in 1985 - 86 by the first author using the radial velocity spectrometer of the Dominion Astrophysical Observatory (DAO). Making use of previous studies of this binary published in the literature the authors first computed orbits separately for the Lick (L), Kitt Peak (K), and DAO (D) radial velocity data subsets. After a number of trials they arrived at a combined orbital solution based on all the 74 observations made at the three observatories covering the interval 1898 - 1986. The combined (LKD) orbit yields a period of PLKD = 3.0707943±0.0000010 days. Finally, following a strategy of Batten and Fletcher the authors tried orbit determination for θ Dra based on the DAO observations alone while fixing the period at PLKD.
Jiang Zhao-Ji
Lu Wen-Xian
Shen Liang-Zhao
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