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Stellar magnetic activity and their influence on the habitability of exoplanets

Published online by Cambridge University Press:  24 July 2015

T. Lüftinger ,
M. Güdel  and
C. Johnstone
T. Lüftinger
Affiliation:
Dept. of Astronomy, University of Vienna, Türkenschanzstr. 17, A-1180 Vienna, Austria e-mail: [email protected], [email protected], [email protected]
M. Güdel
Affiliation:
Dept. of Astronomy, University of Vienna, Türkenschanzstr. 17, A-1180 Vienna, Austria e-mail: [email protected], [email protected], [email protected]
C. Johnstone
Affiliation:
Dept. of Astronomy, University of Vienna, Türkenschanzstr. 17, A-1180 Vienna, Austria e-mail: [email protected], [email protected], [email protected]
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Abstract

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Stellar magnetism, explorable via polarimetry, is a crucial driver of activity, ionization, photodissociation, chemistry and winds in stellar environments. Thus it has an important impact on the atmospheres and magnetospheres of surrounding planets. Modeling of stellar magnetic fields and their winds is extremely challenging, both from the observational and the theoretical points of view, and only recent ground breaking advances in observational instrumentation - as were discussed during this Symposium - and a deeper theoretical understanding of magnetohydrodynamic processes in stars enable us to model stellar magnetic fields and winds and the resulting influence on surrounding planets in more and more detail. We have initiated a national and international research network (NFN): ‘Pathways to Habitability - From Disks to Active Stars, Planets to Life’, to address questions on the formation and habitability of environments in young, active stellar/planetary systems. In this contribution we discuss the work we are carrying out within this project and focus on how stellar magnetic fields, their winds and the relation to stellar rotation can be assessed observationally with relevant techniques such as Zeeman Doppler Imaging (ZDI), field extrapolation and wind simulations.

Keywords

polarizationstars: magnetic fieldsexoplanetshabitability
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Symposium S305: Polarimetry: From the Sun to Stars and Stellar Environments , December 2014 , pp. 333 - 339
Copyright
Copyright © International Astronomical Union 2015 

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