Stability Analysis of Bow Shocks

Details Stability Analysis of Bow Shocks Stability Analysis of Bow Shocks

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...461..927d&link_type=abstract

Astrophysical Journal v.461, p.927

Astronomy and Astrophysics

Astronomy

28

Shock Waves, Stars: Mass Loss

Scientific paper

We present a linear stability analysis of bow shocks created by the interaction of a spherical wind moving with respect to its surrounding medium. The bounding shocks are assumed isothermal and with Mach number M = ∞. Following Soker, we study the evolution of short-wavelength perturbations. We find that the motion is unstable in this limit. Moreover, the ratio of the wind velocity υW to the star velocity υ* characterizes the stability properties. Bow shocks with fast winds for which υ*/υW ≪ 1 are more stable than bow shocks with slow winds, i.e., υ*/υW≫ 1.

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