Additional radial velocities of the Cepheid binary W Sagittarii

Details Additional radial velocities of the Cepheid binary W Sagittarii Additional radial velocities of the Cepheid binary W Sagittarii

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pasp...96..630j&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 96, Aug. 1984, p. 630-633.

Astronomy and Astrophysics

Astronomy

4

Binary Stars, Cepheid Variables, Radial Velocity, Reference Stars, Spectrograms

Scientific paper

Radial-velocities of W Sgr from 28 coudespectrograms taken during 1980-1983 are presented, along with velocities of certain standard stars. A mean velocity of -28.0 + or - 0.7 km/s for a mean epoch of 1981.96 is found. The 1980-1983 data indicate that the orbital period is longer than the 80 years previously suggested, and that the spectroscopic orbit cannot be obtained at this time. Further observations with high accuracy are required so as to obtain the distance and mass of this speckle and spectroscopic binary.

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