Chemical spots and their dynamical evolution on HgMn stars
arXiv:1010.3509 · doi:10.1017/S1743921311015109
Abstract
Our recent studies of late B-type stars with HgMn peculiarity revealed for the first time the presence of fast dynamical evolution of chemical spots on their surfaces. These observations suggest a hitherto unknown physical process operating in the stars with radiative outer envelopes. Furthermore, we have also discovered existence of magnetic fields on these stars that have up to now been thought to be non-magnetic. Here we will discuss the dynamical spot evolution on HD 11753 and our new results on magnetic fields on AR Aur.
4 pages, 2 figures, to appear in the proceedings of the IAU Symposium 273 "Physics of Sun and Star Spots", Ventura, California 22-26 August 2010
References in corpus (3)
- Weather in stellar atmosphere: the dynamics of mercury clouds in alpha Andromedae
- Inhomogeneous surface distribution of chemical elements in the eclipsing binary AR Aur: A new challenge for our understanding of HgMn stars
- Searching for a link between the presence of chemical spots on the surface of HgMn stars and their weak magnetic fields