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Chemical spots and their dynamical evolution on HgMn stars

Published online by Cambridge University Press:  26 August 2011

Heidi Korhonen ,
Swetlana Hubrig ,
Maryline Briquet ,
Federico González  and
Igor Savanov
Heidi Korhonen
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Str 2, D-85748, Garching bei München, Germany email: hkorhone@eso.org
Swetlana Hubrig
Affiliation:
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany
Maryline Briquet
Affiliation:
Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
Federico González
Affiliation:
Instituto de Ciencias Astronomicas, de la Tierra, y del Espacio (ICATE), 5400 San Juan, Argentina
Igor Savanov
Affiliation:
Institute of Astronomy, Russian Academy of Sciences, Pyatnitskaya 48, Moscow 119017, Russia
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Abstract

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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.

Keywords

Stars: atmosphereschemically peculiarearly-typemagnetic fieldsspots
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S273: The Physics of Sun and Star Spots , August 2010 , pp. 116 - 120
Copyright
Copyright © International Astronomical Union 2011

References

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