The Propagation of Kinks in Line-driven Winds

Details The Propagation of Kinks in Line-driven Winds The Propagation of Kinks in Line-driven Winds

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008apj...679..704f&link_type=abstract

The Astrophysical Journal, Volume 679, Issue 1, pp. 704-711.

Astronomy and Astrophysics

Astronomy

2

Radiative Transfer, Stars: Winds, Outflows

Scientific paper

We show that discontinuities in spatial derivatives of the velocity and density law, so-called kinks, can propagate upstream at Mach numbers > 1 with respect to radiative-acoustic waves in stellar winds driven by radiation scattering in spectral lines. This fast upstream propagation of kinks can, for example, explain the slow evolution of discrete absorption components found in P Cygni line profiles from O stars.

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