Time-dependent hydrodynamic phenomena in the envelopes of the Be stars

Details Time-dependent hydrodynamic phenomena in the envelopes of the Be stars Time-dependent hydrodynamic phenomena in the envelopes of the Be stars

Jan 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...195..391m&link_type=abstract

Astrophysical Journal, vol. 195, Jan. 15, 1975, pt. 1, p. 391-395.

Astronomy and Astrophysics

Astrophysics

5

Astronomical Models, B Stars, Hydrodynamic Equations, Stellar Envelopes, Time Dependence, Angular Distribution, Continuity Equation, Euler Equations Of Motion, Flow Characteristics, Periodic Variations, Spatial Distribution

Scientific paper

Temporal and angular variations in the motion and distribution of circumstellar material about Be stars are studied by means of a simple hydrodynamical approach. The flow variables are each written as the sum of a known, steady-state axisymmetric term and a smaller component which contains both temporal and angular dependence. Substitution of these dichotomous expressions for the flow variables into Euler's equation and the continuity equation leads to a set of linearized equations for the terms which depend on time and angle. Solutions can be found to a somewhat approximated version of the linearized equations, and these solutions explain the qualitative features of the observed short-time variations.

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