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The evolving magnetic topology of τ Boötis.
- Source :
- Monthly Notices of the Royal Astronomical Society; 7/11/2016, Vol. 459 Issue 4, p4325-4342, 18p
- Publication Year :
- 2016
-
Abstract
- We present six epochs of spectropolarimetric observations of the hot-Jupiter-hosting star t 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 t 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, t Bootis and this long-term monitoring campaign presents a unique opportunity for studying stellar magnetic cycles. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00358711
- Volume :
- 459
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Publication Type :
- Academic Journal
- Accession number :
- 116142305
- Full Text :
- https://doi.org/10.1093/mnras/stw828