The Large-Scale Axisymmetric Magnetic Topology of a Very-Low-Mass Fully Convective Star

J.-F. Donati, T. Forveille, Andrew Collier Cameron, J.R. Barnes, X. Delfosse, Moira Mary Jardine, J.A. Valenti

Research output: Contribution to journalArticlepeer-review

181 Citations (Scopus)

Abstract

Understanding how cool stars produce magnetic fields within their interiors is crucial for predicting the impact of such fields, such as the activity cycle of the Sun. In this respect, studying fully convective stars enables us to investigate the role of convective zones in magnetic field generation. We produced a magnetic map of a rapidly rotating, very-low-mass, fully convective dwarf through tomographic imaging from time series of spectropolarimetric data. Our results, which demonstrate that fully convective stars are able to trigger axisymmetric large-scale poloidal fields without differential rotation, challenge existing theoretical models of field generation in cool stars.

Original languageEnglish
Pages (from-to)633-635
Number of pages3
JournalScience
Volume311
Issue number5761
DOIs
Publication statusPublished - 3 Feb 2006

Keywords

  • T-TAURI STARS
  • ACTIVE STARS
  • M-DWARFS
  • SOLAR DYNAMO
  • ROTATION
  • FIELD
  • RECONSTRUCTION
  • GENERATION

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