Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...262..714n&link_type=abstract
Astrophysical Journal, Part 1, vol. 262, Nov. 15, 1982, p. 714-716.
Astronomy and Astrophysics
Astrophysics
14
Astronomical Models, Binary Stars, Doppler Effect, Stellar Spectra, Fourier Analysis, Fourier Transformation, Kinematics, Periodic Variations, Plasma Jets, Radial Velocity
Scientific paper
Differing calculations of the six day period in the radial velocities of the modeled two high-speed jets issuing from the celestial object SS 433 are shown to generate slightly varying results. A rigorous Fourier transform is applied to the kinematic model of the six day variation to obtain the relative powers expected from different periods determined by a Fourier analysis. The power at 6.29 days is determined to be three times the power at 5.84 days. It is concluded that the values obtained for the six-day period in the wavelengths of the shifting lines in SS 433 are compatible with a variation in the direction of the velocity vectors. The cone angle and the azimuth angle are determined to oscillate at a fundamental period of 6.06 days. It is noted that failure to include precessional period changes will cause Fourier analyses of the short period to be dependent on the mean epoch and the temporal range of the data.
Collins George W. II
Newsom Gerald H.
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