Accretion in massive binary systems

by Prof. Amit Kashi

Ariel U.

at Astrophysics and Cosmology Seminar

Wed, 24 Jan 2024, 11:10
Sacta-Rashi Building for Physics (54), room 207

Abstract

Massive stars blow strong winds that affect their evolution. When in a binary system, their winds collide and emit across the spectrum, providing an opportunity to study the stars and the interaction between them. The shape of the colliding winds structure depends on the relative intensity of the winds and the orbital motion. The structure may therefore be time-dependent, and consequently its emission. The winds, as well as eruptions with the presence of a companion influence on the morphology of the surrounding nebula. There are many physical effects involved in the colliding wind problem, and its complexity requires 3D numerical simulations. I will show simulations of colliding winds in massive binary systems that include detailed treatment of wind ejection, orbital motion, clumpiness, and other effects. I will discuss conditions that may result in accretion onto the star with the weaker wind and show examples of systems where such accretion is obtained. I will also show new relations between the mass accretion rate and the ratio of stellar wind momenta.

Created on 18-01-2024 by Zitrin, Adi (zitrin)
Updaded on 18-01-2024 by Zitrin, Adi (zitrin)