SIMBAD references

2013MNRAS.435.1451F - Mon. Not. R. Astron. Soc., 435, 1451-1462 (2013/October-3)

A small survey of the magnetic fields of planet-host stars.

FARES R., MOUTOU C., DONATI J.-F., CATALA C., SHKOLNIK E.L., JARDINE M.M., CAMERON A.C. and DELEUIL M.

Abstract (from CDS):

Using spectropolarimetry, we investigate the large-scale magnetic topologies of stars hosting close-in exoplanets. A small survey of 10 stars has been done with the twin instruments Télescope Bernard Lyot/NARVAL and Canada-France-Hawaii Telescope/ESPaDOnS between 2006 and 2011. Each target consists of circular polarization observations covering 7-22 d. For each of the seven targets in which a magnetic field was detected, we reconstructed the magnetic field topology using Zeeman-Doppler imaging. Otherwise, a detection limit has been estimated. Three new epochs of observations of τ Boo are presented, which confirm magnetic polarity reversal. We estimate that the cycle period is 2 yr, but recall that a shorter period of 240 d cannot still be ruled out. The result of our survey is compared to the global picture of stellar magnetic field properties in the mass-rotation diagram. The comparison shows that these giant planet-host stars tend to have similar magnetic field topologies to stars without detected hot Jupiters. This needs to be confirmed with a larger sample of stars.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): techniques: polarimetric - stars: activity - stars: magnetic field - planetary systems

Simbad objects: 11

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2019.10.22-06:46:07

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