Cantiello , M , Braithwaite , J , Brandenburg , A , Del Sordo , F , Käpylä , P & Langer , N 2010 , Turbulence and magnetic spots at the surface of hot massive stars . in Physics of Sun and Starspots : Proceedings of the International Astronomical Union Symposium 273 . Proceedings of the International Astronomical Union , no. S273 , Cambridge University Press , pp. 200-203 , Symposium of the IAU , Ventura, CA , United States , 22/08/2010 . https://doi.org/10.1017/S1743921311015249
Title: | Turbulence and magnetic spots at the surface of hot massive stars |
Alternative title: | Turbulence and magnetic spots at the surface of hot massive stars |
Author: | Cantiello, Matteo; Braithwaite, Jonathan; Brandenburg, Axel; Del Sordo, Fabio; Käpylä, Petri; Langer, Norbert |
Contributor organization: | Department of Physics |
Publisher: | Cambridge University Press |
Date: | 2010 |
Language: | eng |
Number of pages: | 4 |
Belongs to series: | Physics of Sun and Starspots |
Belongs to series: | Proceedings of the International Astronomical Union |
DOI: | https://doi.org/10.1017/S1743921311015249 |
URI: | http://hdl.handle.net/10138/39228 |
Abstract: | Hot luminous stars show a variety of phenomena in their photospheres and in their winds which still lack clear physical explanations at this time. Among these phenomena are non-thermal line broadening, line profile variability (LPVs), discrete absorption components (DACs), wind clumping and stochastically excited pulsations. Cantiello et al. (2009) argued that a convection zone close to the surface of hot, massive stars, could be responsible for some of these phenomena. This convective zone is caused by a peak in the opacity due to iron recombination and for this reason is referred as the "iron convection zone" (FeCZ). 3D MHD simulations are used to explore the possible effects of such subsurface convection on the surface properties of hot, massive stars. We argue that turbulence and localized magnetic spots at the surface are the likely consequence of subsurface convection in early type stars. |
Description: | 4 pages, 1 figure, to appear in the proceedings of IAU Symposium 273 "Physics of Sun and Starspots" |
Subject: |
astro-ph.SR
physics.flu-dyn 115 Astronomy, Space science |
Peer reviewed: | Yes |
Usage restriction: | restrictedAccess |
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