The spectroscopic orbit of 6 Draconis

Details The spectroscopic orbit of 6 Draconis The spectroscopic orbit of 6 Draconis

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990japa...11..255g&link_type=abstract

Journal of Astrophysics and Astronomy (ISSN 0250-6335), vol. 11, June 1990, p. 255-263. Research supported by NSF and USAF.

Astronomy and Astrophysics

Astrophysics

4

Binary Stars, Stellar Orbits, Stellar Spectrophotometry, Ultraviolet Spectroscopy, A Stars, Iue, Lyman Alpha Radiation, Main Sequence Stars, Radial Velocity, Stellar Magnitude

Scientific paper

It has long been known that 6 Dra shows small variations in radial velocity, and there is photometric and spectroscopic evidence that its spectrum is composite. It is shown, 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. IUE observations show that the spectrum between 1600 and 1800 A is consistent with its arising from a late-A main-sequence companion.

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