Stars: atmospheres; chemically peculiar; early-type; magnetic fields; spots
Abstract :
[en] 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.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Korhonen, Heidi; European Southern Observatory, Karl-Schwarzschild-Str 2, D-85748, Garching bei München, Germany
Hubrig, Swetlana; Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany
Briquet, Maryline ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
González, Federico; Instituto de Ciencias Astronomicas, de la Tierra, y del Espacio (ICATE), 5400 San Juan, Argentina
Savanov, Igor; Institute of Astronomy, Russian Academy of Sciences, Pyatnitskaya 48, Moscow 119017, Russia
Language :
English
Title :
Chemical spots and their dynamical evolution on HgMn stars
Publication date :
01 August 2011
Event name :
IAU Symposium 273, The Physics of Sun and Star Spots
Event date :
from 22-08-2010 to 26-08-2010
Audience :
International
Main work title :
The Physics of Sun and Star Spots, Proceedings of the International Astronomical Union, IAU Symposium, Volume 273
