Bipolar Outflows from OH/IR Stars

Details Bipolar Outflows from OH/IR Stars Bipolar Outflows from OH/IR Stars

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001assl..265..189z&link_type=abstract

Post-AGB Objects as a Phase of Stellar Evolution, Proceedings of the Toruń Workshop held July 5-7, 2000. Edited by R. Szczerba a

Astronomy and Astrophysics

Astrophysics

Scientific paper

High-resolution OH data is used to study the onset of bipolarity in post-AGB stars. We find that high outflow velocities and irregular OH spectra are a reliable indicator for bipolar outflows. Velocity--radius diagrams show the presence of two components: a uniform, spherical wind and a collimated flow with velocity increasing linearly with radius. A momentum-driven wind--wind interaction model reproduces the observed features. We show evidence for enhanced post-AGB life times, which may indicate the effect of envelope re-accretion.

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