Turbulence and magnetic spots at the surface of hot massive stars

Show full item record



Permalink

http://hdl.handle.net/10138/39228

Citation

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
Author: Cantiello, Matteo; Braithwaite, Jonathan; Brandenburg, Axel; Del Sordo, Fabio; Käpylä, Petri; Langer, Norbert
Contributor: University of Helsinki, Department of Physics
Publisher: Cambridge University Press
Date: 2010
Language: eng
Number of pages: 4
Belongs to series: Physics of Sun and Starspots Proceedings of the International Astronomical Union Symposium 273
Belongs to series: Proceedings of the International Astronomical Union
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.
Subject: astro-ph.SR
physics.flu-dyn
115 Astronomy, Space science
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
1010.2498v1 752.6Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record