# A BCool survey of the magnetic fields of planet-hosting solar-type stars

Mengel, M. W. and Marsden, S. C. and Carter, B. D. and Horner, J. and King, R. and Fares, R. and Jeffers, S. V. and Petit, P. and Vidotto, A. A. and Morin, J. and BCool Collaboration, (2017) A BCool survey of the magnetic fields of planet-hosting solar-type stars. Monthly Notices of the Royal Astronomical Society, 465 (3). pp. 2734-2747. ISSN 0035-8711

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## Abstract

We present a spectropolarimetric snapshot survey of solar-type planet hosting stars. In addition to 14 planet-hosting stars observed as part of the BCool magnetic snapshot survey, we obtained magnetic observations of a further 19 planet-hosting solar-type stars in order to see if the presence of close-in planets had an effect on the measured surface magnetic field ($|B_{\ell}|$). Our results indicate that the magnetic activity of this sample is congruent with that of the overall BCool sample. The effects of the planetary systems on the magnetic activity of the parent star, if any, are too subtle to detect compared to the intrinsic dispersion and correlations with rotation, age and stellar activity proxies in our sample. Four of the 19 newly observed stars, two of which are subgiants, have unambiguously detected magnetic fields and are future targets for Zeeman Doppler Mapping.

Item Type: Article (Commonwealth Reporting Category C) Yes Live Archive Access to Published version in accordance with the copyright policy of the publisher. Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences 11 Aug 2017 04:59 19 Jan 2018 05:43 stars, magnetic fields, polarimetric, planetary systems 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences 10.1093/mnras/stw2949 http://eprints.usq.edu.au/id/eprint/30589

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