A statistical study of the 164 day clock noise of the relativistic beams in SS 433

Details A statistical study of the 164 day clock noise of the relativistic beams in SS 433 A statistical study of the 164 day clock noise of the relativistic beams in SS 433

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....106.2359b&link_type=abstract

The Astronomical Journal (ISSN 0004-6256), vol. 106, no. 6, p. 2359-2364

Astronomy and Astrophysics

Astronomy

7

Beams (Radiation), Doppler Effect, Emission Spectra, Red Shift, Relativistic Particles, Statistical Analysis, White Noise, Clocks, Data Bases, Helium, Hydrogen, Power Spectra, X Rays

Scientific paper

We have estimated the epochs of the phases of maximal red and blue beam Doppler shifts for various cyles of the approximately 164 day period in SS 433, using an updated optical spectroscopic data base, which covers a time span of over 13 years. By constructing power density spectra of phase residuals based on these epochs (residuals measured relative to a hypothetical clock with constant period), we are able to characterize the statistical behavior of the clock noise in both the red and blue beam 164 day cycles as a white noise process in the first time derivative of 164 day phase fluctuations (i.e., as a white noise process in frequency, or equivalently, as a random walk in 164 day phase). Our characterizations of the 164 day clock noise in SS 433 show a strong, quantitative similarity to the previously characterized clock noise of the 35 day periodicity of x-ray turn-ons in Her X-1, leading further credence to the notion that the relevant underlying physical process in both systems in disk precession.

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