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dc.contributor.authorMarsden, S. C.
dc.contributor.authorPetit, P.
dc.contributor.authorJeffers, S. V.
dc.contributor.authorMorin, J.
dc.contributor.authorFares, R.
dc.contributor.authorReiners, A.
dc.contributor.authordo Nascimento, J. -D.
dc.contributor.authorAuriere, M.
dc.contributor.authorBouvier, J.
dc.contributor.authorCarter, B. D.
dc.contributor.authorCatala, C.
dc.contributor.authorDintrans, B.
dc.contributor.authorDonati, J. -F.
dc.contributor.authorGastine, T.
dc.contributor.authorJardine, M.
dc.contributor.authorKonstantinova-Antova, R.
dc.contributor.authorLanoux, J.
dc.contributor.authorLignieres, F.
dc.contributor.authorMorgenthaler, A.
dc.contributor.authorRamirez-Velez, J. C.
dc.contributor.authorTheado, S.
dc.contributor.authorVan Grootel, V.
dc.contributor.authorBCool Collaboration
dc.identifier.citationMarsden , S C , Petit , P , Jeffers , S V , Morin , J , Fares , R , Reiners , A , do Nascimento , J -D , Auriere , M , Bouvier , J , Carter , B D , Catala , C , Dintrans , B , Donati , J -F , Gastine , T , Jardine , M , Konstantinova-Antova , R , Lanoux , J , Lignieres , F , Morgenthaler , A , Ramirez-Velez , J C , Theado , S , Van Grootel , V & BCool Collaboration 2014 , ' A BCool magnetic snapshot survey of solar-type stars ' , Monthly Notices of the Royal Astronomical Society , vol. 444 , no. 4 , pp. 3517-3536 .
dc.identifier.otherORCID: /0000-0002-1466-5236/work/57821871
dc.descriptionSVJ acknowledges research funding by the Deutsche Forschungsgemeinschaft (DFG) under grant SFB 963/1, project A16. JM was funded by a fellowship of the Alexander von Humboldt Foundation in Göttingen. RF acknowledges funding from the STFC.en
dc.description.abstractWe present the results of a major high-resolution spectropolarimetric BCool project magnetic survey of 170 solar-type stars. Surface magnetic fields were detected on 67 stars, with 21 classified as mature solar-type stars, a result that increases by a factor of 4 the number of mature solar-type stars on which magnetic fields have been observed. In addition, a magnetic field was detected for 3 out of 18 of the subgiant stars surveyed. For the population of K-dwarfs, the mean value of |Bl| (|Bl|mean) was also found to be higher (5.7 G) than |Bl|mean measured for the G-dwarfs (3.2 G) and the F-dwarfs (3.3 G). For the sample as a whole, |Bl|mean increases with rotation rate and decreases with age, and the upper envelope for |Bl| correlates well with the observed chromospheric emission. Stars with a chromospheric S-index greater than about 0.2 show a high magnetic field detection rate and so offer optimal targets for future studies. This survey constitutes the most extensive spectropolarimetric survey of cool stars undertaken to date, and suggests that it is feasible to pursue magnetic mapping of a wide range of moderately active solar-type stars to improve our understanding of their surface fields and dynamos.
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.subjectLine: profilesen
dc.subjectMagnetic fieldsen
dc.subjectStars: activityen
dc.subjectMain-sequence starsen
dc.subjectSurface differential rotationen
dc.subjectGeneva-Copenhagen surveyen
dc.subjectH-Alpha emissionen
dc.subjectLow-mass starsen
dc.subjectChromospheric activityen
dc.subjectGalactic disken
dc.subjectActive starsen
dc.subjectNearby starsen
dc.subjectStellar polarimetryen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleA BCool magnetic snapshot survey of solar-type starsen
dc.typeJournal articleen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.description.statusPeer revieweden

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