The Magnetic Field Geometry of Cool Stars

Victor See, Moira Jardine, Aline Vidotto, Jean-Francois Donati, Colin Folsom, Sudeshna Boro Saikia, Jerome Bouvier, Rim Fares, Scott Gregory, Gaitee Hussain, Sandra Jeffers, Stephen Marsden, Julien Morin, Claire Moutou, Jose-Dias do Nascimento, Pascal Petit, Lisa Rosen, Ian Waite

Research output: Contribution to conferencePoster


Zeeman-Doppler imaging has been used to map the large-scale surface magnetic fields of cool stars across a wide range of stellar masses and rotation periods. The derived field geometries are surprising, with many stars showing strong azimuthal fields that are not observed on the Sun. In this poster, using 100 magnetic maps of over 50 stars, we present results showing how the magnetic field geometry of cool stars varies as a function of fundamental parameters. The stellar mass, and hence internal structure, critically influences the field geometry, although this is modified by the stellar rotation rate. We discuss the implications of these results for dynamo theory and the nature of stellar magnetic activity....
Original languageEnglish
Publication statusPublished - Jun 2016

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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