The evolving magnetic topology of τ Boötis
Article
Article Title | The evolving magnetic topology of τ Boötis |
---|---|
ERA Journal ID | 1074 |
Article Category | Article |
Authors | Mengel, M. W. (Author), Fares, R. (Author), Marsden, S. C. (Author), Carter, B. D. (Author), Jeffers, S. V. (Author), Petit, P. (Author), Donati, J.-F. (Author) and Folsom, C. P. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 459 (4), pp. 4325-4342 |
Number of Pages | 18 |
Year | 2016 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stw828 |
Web Address (URL) | https://academic.oup.com/mnras/article/459/4/4325/2623998 |
Abstract | We present six epochs of spectropolarimetric observations of the hot-Jupiter-hosting star tau Bootis that extend the exceptional previous multiyear data set of its large-scale magnetic field. Our results confirm that the large-scale magnetic field of tau Bootis varies cyclicly, with the observation of two further magnetic reversals; between 2013 December and 2014 May and between 2015 January and March. We also show that the field evolves in a broadly solar-type manner in contrast to other F-type stars. We further present new results which indicate that the chromospheric activity cycle and the magnetic activity cycles are related, which would indicate a very rapid magnetic cycle. As an exemplar of long-term magnetic field evolution, tau Bootis and this long-term monitoring campaign presents a unique opportunity for studying stellar magnetic cycles. |
Keywords | magnetic fields, techniques polarimetric, stars activity, stars imaging, stars individual tau Boo, planetary systems |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Byline Affiliations | Computational Engineering and Science Research Centre |
National Institute of Astrophysics, Italy | |
Georg August University of Gottingen, Germany | |
University of Toulouse, France | |
Grenoble Alpes University, France | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q3940/the-evolving-magnetic-topology-of-bo-tis
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