Modification of the nebular environment in symbiotic systems due to colliding winds

Details Modification of the nebular environment in symbiotic systems due to colliding winds Modification of the nebular environment in symbiotic systems due to colliding winds

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...278..209n&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 278, no. 1, p. 209-225

Computer Science

Numerical Analysis

45

Nebulae, Stellar Envelopes, Stellar Winds, Symbiotic Stars, Emission Spectra, Hydrodynamics, Numerical Analysis, Shock Fronts

Scientific paper

Colliding stellar winds can be the determining factor for the evolution of the nebular environment in symbiotic systems. They may also be at the origin of jet-like features seen in symbiotic stars. The nebula in symbiotic binaries is primarily due to mass lost by the cool star. However, there are indications that during some periods in the evolution of symbiotic systems both stars suffer mass loss. The two stellar winds possess highly different physical characteristics. We study the evolution of the colliding zone of the two winds in cylindrically symmetrical models in the initial phase after the beginning of the outburst. The numerical hydrodynamical calculations show that already on timescales of years the structure of symbiotic nebulae changes substantially, due to the impact of the colliding winds. Calculated images in different emission lines show a remarkable dependence of the image on the emitting ion. The resulting spectral line profiles not only mirror the dynamics of the circumstellar region, but are strongly dependent on the ionizing radiation field.

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