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dc.contributor.authorAlvarado-Gómez, J.D.
dc.contributor.authorHussain, Gaitee Ara Jaffer
dc.contributor.authorGrunhut, J.
dc.contributor.authorFares, Rim
dc.contributor.authorDonati, J.-F.
dc.contributor.authorAlecian, E.
dc.contributor.authorKochukhov, O.
dc.contributor.authorOksala, M.
dc.contributor.authorMorin, J.
dc.contributor.authorRedfield, S.
dc.contributor.authorCohen, O.
dc.contributor.authorDrake, J.J.
dc.contributor.authorJardine, Moira Mary
dc.contributor.authorMatt, S.
dc.contributor.authorPetit, P.
dc.contributor.authorWalter, F.M.
dc.date.accessioned2015-11-05T14:10:05Z
dc.date.available2015-11-05T14:10:05Z
dc.date.issued2015-10
dc.identifier.citationAlvarado-Gómez , J D , Hussain , G A J , Grunhut , J , Fares , R , Donati , J-F , Alecian , E , Kochukhov , O , Oksala , M , Morin , J , Redfield , S , Cohen , O , Drake , J J , Jardine , M M , Matt , S , Petit , P & Walter , F M 2015 , ' Activity and magnetic field structure of the Sun-like planet-hosting star HD 1237 ' , Astronomy & Astrophysics , vol. 582 . https://doi.org/10.1051/0004-6361/201525771en
dc.identifier.issn0004-6361
dc.identifier.otherPURE: 228687733
dc.identifier.otherPURE UUID: d4ae4edb-e5ed-4cf2-8109-fe7bdc0a6b67
dc.identifier.otherScopus: 84943158140
dc.identifier.otherWOS: 000363538500038
dc.identifier.otherORCID: /0000-0002-1466-5236/work/57821904
dc.identifier.urihttps://hdl.handle.net/10023/7744
dc.descriptionDate of Acceptance: 13/07/2015en
dc.description.abstractWe analyse the magnetic activity characteristics of the planet-hosting Sun-like star, HD 1237, using HARPS spectro-polarimetric time-series data. We find evidence of rotational modulation of the magnetic longitudinal field measurements that is consistent with our ZDI analysis with a period of 7 days. We investigate the effect of customising the LSD mask to the line depths of the observed spectrum and find that it has a minimal effect on the shape of the extracted Stokes V profile but does result in a small increase in the S/N (~7%). We find that using a Milne-Eddington solution to describe the local line profile provides a better fit to the LSD profiles in this slowly rotating star, which also affects the recovered ZDI field distribution. We also introduce a fit-stopping criterion based on the information content (entropy) of the ZDI map solution set. The recovered magnetic field maps show a strong (+90 G) ring-like azimuthal field distribution and a complex radial field dominating at mid latitudes (~45 degrees). Similar magnetic field maps are recovered from data acquired five months apart. Future work will investigate how this surface magnetic field distribution affects the coronal magnetic field and extended environment around this planet-hosting star.
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysicsen
dc.rights© ESO, 2015. Reproduced with permission from Astronomy & Astrophysics, © ESO. This is the final published version of the work, which was originally published at: http://dx.doi.org/10.1051/0004-6361/201525771en
dc.subjectStars: activityen
dc.subjectStars: magnetic fielden
dc.subjectStars: solar-typeen
dc.subjectStars: individual: HD 1237en
dc.subjectQC Physicsen
dc.subjectQB Astronomyen
dc.subjectNDASen
dc.subject.lccQCen
dc.subject.lccQBen
dc.titleActivity and magnetic field structure of the Sun-like planet-hosting star HD 1237en
dc.typeJournal articleen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.identifier.doihttps://doi.org/10.1051/0004-6361/201525771
dc.description.statusPeer revieweden
dc.identifier.grantnumberST/M001296/1en
dc.identifier.grantnumberST/J001651/1en


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