Short-period components in the relativistic radial velocities of SS 433 equals V 1343 AQL

Details Short-period components in the relativistic radial velocities of SS 433 equals V 1343 AQL Short-period components in the relativistic radial velocities of SS 433 equals V 1343 AQL

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...119..153m&link_type=abstract

Astronomy and Astrophysics, vol. 119, no. 1, Mar. 1983, p. 153-159. Research supported by the Consiglio Nazionale delle Ricerch

Astronomy and Astrophysics

Astronomy

18

Eclipsing Binary Stars, Radial Velocity, Relativistic Velocity, Stellar Oscillations, Stellar Spectra, Variable Stars, Ephemerides, Fourier Analysis, Maxima, Minima, Power Spectra, Precession, Radio Sources (Astronomy), Stellar Evolution, X Ray Sources

Scientific paper

Deviations from the mean sinusoidal trend of the "moving" lines in SS 433 (V 1343 Aquilae) have been found to occur, anticorrelated between the "red" and "blue" line systems.
The superposition of epochs of maxima and minima, as well as the Fourier analysis, indicate a clear periodicity of 6.d28 for these deviations, from our sample of spectroscopic data (1978- 1981). This period appears also to be decreasing, with Pdot/P = -1.8 1O-5 d/d.
Other minor periodic components are also detected, indicating for all of them a pattern of the type 1/P = 1/P6.28 + m/P163, symmetric with respect to the dominant P = 6.d28.
An ephemeris for the "moving" lines of SS 433 is thus provided according to the precessional period of 163.d34 and the short-time modulation of 6.d28

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