Secular change in the '164-day' period of SS 433

Details Secular change in the '164-day' period of SS 433 Secular change in the '164-day' period of SS 433

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ap%26ss..81..199c&link_type=abstract

Astrophysics and Space Science, vol. 81, no. 1-2, Jan. 1982, p. 199-208.

Astronomy and Astrophysics

Astrophysics

10

Astronomical Models, Eclipsing Binary Stars, Ephemerides, Radial Velocity, Secular Variations, Kinematics, Least Squares Method, Tables (Data)

Scientific paper

Evidence is presented which shows that the nominal 164-day period in the wavelengths of the moving lines in SS 433 has been decreasing at the rate of -0.010 + or - 0.002. An ephemeris is provided for the moving lines over the 1981 observing season which assumes the stated rate of decrease. It is concluded that the period has been decreasing by about 1% for several years, implying a lifetime value as short as 40 years. The period change is of consequence for the models proposed for this complex system.

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