The possible nature of the periodic variability of the radial velocities and light of the runaway Of star HD 188001 (9 Sge)

Details The possible nature of the periodic variability of the radial velocities and light of the runaway Of star HD 188001 (9 Sge) The possible nature of the periodic variability of the radial velocities and light of the runaway Of star HD 188001 (9 Sge)

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992sval...18...58a&link_type=abstract

Soviet Astronomy Letters, Vol. 18, p. 58; Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 18, no. 2, Feb. 1992, p. 139-

Astronomy and Astrophysics

Astronomy

5

Binary Stars, Light Speed, O Stars, Periodic Variations, Radial Velocity, Stellar Spectrophotometry, Light Curve, Stellar Orbits

Scientific paper

Results of WBVR photometric and spectroscopic observations of the Of star 9 Sge are presented. A variability of radial velocities (about 9 km/s) and of light (about 0.06 m) with a period of 32.514 d was discovered. Joint analysis of the radial velocity curve and WBVR light curves was carried out. A faint (less than 0.01) variability of the Delta(V-R) color index with the period found is suspected. It is suggested that 9 Sge is an eclipsed binary system with a low-mass (1.5 solar mass) companion moving in an eccentric (e of about 0.6) orbit.

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