Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993acasn..34..153t&link_type=abstract
Acta Astronomica Sinica (ISSN 0001-5245), vol. 34, no. 2, p. 158-164
Astronomy and Astrophysics
Astronomy
Eclipsing Binary Stars, Orbital Elements, Spectral Emission, Stellar Orbits, Astronomical Spectroscopy, Radial Velocity, Space Observations (From Earth), Stellar Evolution, Telescopes, Time Series Analysis
Scientific paper
HD105020 (SAO 08216) was announced by Archer (1959) as a new Algol type binary with a period about two days; the eclipse depths of its primary and secondary minima are 1.7 and 0.3 mag., respectively. The spectral type of the primary is, as K. Wood et al. (1980) pointed out, a very important binary for evolution of cool stars, if confirmed. Twenty-one observations were made with Coude Reticon attached to the 2.1-m telescope at McDonald Observatory 17-19 Jan. 1984. Three data were obtained by Coude T13 CCD of 2.1-m telescope at Kitt Peak Observatory 13-14 June 1991, with the dispersion of 14.8A/mm. The radial velocities from these data are listed. Compiling and analyzing the previous results by Heard (1956, 1965), we conclude that HD105020 is a binary with a period of about 20 days instead of 2 days.
Pan Kai-Ke
Tan Hui-Song
Zhang Zhou-Sheng
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