Advertisement

Periods Ranging from 5 to 1500 Days in the Anticorrelated Moving Lines of SS 433

  • S. Frasca
  • F. Ciatti
  • A. Mammano

Abstract

Some tens of harmonic components are found in the moving lines of SS 433, leaving a standard deviation of 0.002 in Z units, that is comparable to the observational error. Ten harmonics appear anticorrelated in the two branches, among which those at 80, 155, and 1500 days are also strong. Their behaviour indicates changing structure in the ejecting mechanism. No secular change is occurring in the precessional 163-day period beyond the estimated error of 5 × 10-5d-1. No periodicity occurs in beam velocity. One quarter of cases of (Z l + Z 2) are found outside their mean value by more than 5σ. This implies either variable beam velocity or absence of strict antiparallelism.

Keywords

Harmonic Component Observational Error Secular Change Misalignment Angle Double Star 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Ciatti, F., Mammano, A., and Vittone, A.: 1981, Astron. Astrophys. 94, 251.ADSGoogle Scholar
  2. Ciatti, F., Mammano, A., Iijima, T., and Vittone, A.: 1983, Astron. Astrophys. Suppl. Ser. 52, 443.ADSGoogle Scholar
  3. Cogotti, R., Doo Jong, S., and Ruffini, R.: 1983, preprint.Google Scholar
  4. Milgrom, M.: 1980, Astron. Astrophys. 87, L15.ADSGoogle Scholar

Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1984

Authors and Affiliations

  • S. Frasca
    • 1
  • F. Ciatti
    • 2
  • A. Mammano
    • 2
    • 3
  1. 1.Department of PhysicsUniversity of RomeItaly
  2. 2.Asiago Astrophysical ObservatoryUniversity of PadovaItaly
  3. 3.Department of MathematicsUniversity of MessinaItaly

Personalised recommendations