Couderadial velocities of Zeta Herculis

Details Couderadial velocities of Zeta Herculis Couderadial velocities of Zeta Herculis

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jrasc..77..126s&link_type=abstract

Journal of the Royal Astronomical Society of Canada (ISSN 0035-872X), vol. 77, June 1983, p. 126-141. Research supported by the

Astronomy and Astrophysics

Astronomy

7

Binary Stars, Line Spectra, Radial Velocity, Stellar Spectra, Stellar Spectrophotometry, Abundance, Astrometry, Astronomical Photography, Mass To Light Ratios, Orbital Elements, Spectrographs, Stellar Mass, Stellar Parallax, Visible Spectrum

Scientific paper

The visual binary Zeta Herculis (HR6212, HD150680) was discovered by Herschel in 1782, according to Lewis (1906). There exist radial-velocity observations of Zeta Herculis dating back to 1983. Since 1962, radial-velocity observations of Zeta Herculis were conducted with the coudespectrograph of a 1.22-m telescope. Over 90 spectrograms have been measured, initially with a projection machine, and more recently with the Arcturus oscilloscope machine. Several different orbital solutions have been obtained. Attention is given to the proposal made by Baize (1976) that the primary of Zeta Herculis is itself double, with a period of 10.5 years. It is found that the possibility of the existence of a third body in any orbit similar to that proposed by Baize can be ruled out with certainty.

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