Statistics – Computation
Scientific paper
Feb 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apjs...60..393s&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 60, Feb. 1986, p. 393-431. Research supported by the Institute fo
Statistics
Computation
26
Binary Stars, Line Spectra, Plasma Acceleration, Plasma Jets, Radiative Transfer, Radio Jets (Astronomy), Computational Astrophysics, Emission Spectra, Flow Equations, Locking, Milky Way Galaxy, Radio Stars, Relativistic Velocity, Spectral Energy Distribution, Variable Stars
Scientific paper
A line-locking mechanism previously proposed to explain the outflow velocity of the Doppler-shifted, optical emission line gas in the jets of SS 433 is examined in detail. The basic constraints which the mechanism must satisfy to explain the jet acceleration are presented. A fundamental limit which exists on the amount of mass which can be ejected by this mechanism is derived. The special relativistic flow equations which govern the acceleration of the gas are derived. The results of detailed numerical calculations to solve these equations are anticipated by deriving two analytical solutions, one for acceleration by resonance-line scattering and one for acceleration by electron scattering, as well as approximate scaling laws for the acceleration rate, the ionization balance and population equilibrium, the clumping factor, and the relative importance of Lyman-alpha and electron scattering. It is found that line-locking can explain the value, constancy, and uniformity of the jet velocity as long as given requirements are met.
Milgrom Mordehai
Rees Martin J.
Shapiro Paul R.
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