Heidelberg 2022 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 1: Astrophysics

EP 1.2: Vortrag

Montag, 21. März 2022, 14:30–14:45, EP-H1

Finite time singularities and their relations to eruptive stellar mass loss events — •Dieter Nickeler and Michaela Kraus — Astronomical Institute, Czech Academy of Sciences, Ondrejov, Czech Republic

In recent years rings, spiral and arc structures have been detected around massive stars with strong stellar winds. These structures are proposed to be a result of stellar mass ejections. Taking a (fast) stationary stellar wind as initial condition, the time-dependent amplitude modulation is analyzed with respect to eventually occurring finite-time instabilities. These so called blow-up solutions can be interpreted as non-linear instabilities in the stellar wind, leading to eruptive mass loss of the star. We analyze under which circumstances such blow-up solutions can exist.