The spectroscopic orbit of 6 Draconis |
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| Authors: | R F Griffin J J Eitter D Reimers |
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| Institution: | (1) The Observatories, Madingley Road, CB3 OHA Cambridge, England;(2) Erwin W. Fick Observatory, Iowa State University, 50011 Ames, Iowa, USA;(3) Hamburger Sternwarte, Gojenbergsweg 112, D-2050 Hamburg 80, Federal Republic of Germany |
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| Abstract: | 6 Dra has long been known to show small variations in radial velocity, and there is photometric and spectroscopic evidence
that its spectrum is composite. We show, largely on the basis of a generous number of photoelectric radial velocities mainly
obtained at Cambridge and Fick observatories, that the orbit is of mild eccentricity and has a period of 562 days and a semi-amplitude
of 7 km s−1.IUE observations show that the spectrum between 1600 and 1800 ∢ is consistent with its arising from a late-A main-sequence companion
Based in part on observations made with the Cambridge radial-velocity spectrometer, in part on those made with the Erwin W.
Fick Observatory spectrometer, and in part on those made by the International Ultraviolet Explorer and collected at the Villafranca
Satellite Tracking Station of the European Space Agency. |
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| Keywords: | radial velocities spectroscopic binaries orbits stars individual 6 Dra |
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