SIMBAD references

2016MNRAS.459.4325M - Mon. Not. R. Astron. Soc., 459, 4325-4342 (2016/July-2)

The evolving magnetic topology of τ Bootis.

MENGEL M.W., FARES R., MARSDEN S.C., CARTER B.D., JEFFERS S.V., PETIT P., DONATI J.-F. and FOLSOM C.P.

Abstract (from CDS):

We present six epochs of spectropolarimetric observations of the hot-Jupiter-hosting star τ 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 τ 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, τ Bootis and this long-term monitoring campaign presents a unique opportunity for studying stellar magnetic cycles.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): magnetic fields - techniques: polarimetric - stars: activity - stars: imaging - stars: individual: τ Boo - planetary systems - planetary systems

Simbad objects: 2

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2019.10.20-04:17:48

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