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dc.contributor.authorBrown, E L
dc.contributor.authorMarsden, S C
dc.contributor.authorMengel, M W
dc.contributor.authorJeffers, S V
dc.contributor.authorMillburn, I
dc.contributor.authorMittag, M
dc.contributor.authorPetit, P
dc.contributor.authorVidotto, A A
dc.contributor.authorMorin, J
dc.contributor.authorSee, V
dc.contributor.authorJardine, M
dc.contributor.authorGonzález-Pérez, J N
dc.date.accessioned2021-02-23T16:30:08Z
dc.date.available2021-02-23T16:30:08Z
dc.date.issued2021-03
dc.identifier.citationBrown , E L , Marsden , S C , Mengel , M W , Jeffers , S V , Millburn , I , Mittag , M , Petit , P , Vidotto , A A , Morin , J , See , V , Jardine , M & González-Pérez , J N 2021 , ' Magnetic field and chromospheric activity evolution of HD 75332 : a rapid magnetic cycle in an F star without a hot Jupiter ' , Monthly Notices of the Royal Astronomical Society , vol. 501 , no. 3 , pp. 3981–4003 . https://doi.org/10.1093/mnras/staa3878en
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 272472171
dc.identifier.otherPURE UUID: ce8f2fb1-7035-4001-b9c4-0df732eb2497
dc.identifier.otherJisc: 5d6fd7bbb6ee4046a650a90ffa8f9998
dc.identifier.otherORCID: /0000-0002-1466-5236/work/87403979
dc.identifier.otherORCID: /0000-0002-4763-5068/work/87404000
dc.identifier.otherScopus: 85100335625
dc.identifier.otherWOS: 000610549500063
dc.identifier.urihttp://hdl.handle.net/10023/21495
dc.descriptionELB is supported by an Australian Government Research Training Program (RTP) Scholarship. SJ acknowledges the support of the German Science Foundation (DFG) Research Unit FOR2544 ‘Blue Planets around Red Stars’ (project JE 701/3-1) and DFG priority program SPP 1992 ‘Exploring the Diversity of Extrasolar Planets’ (JE 701/5-1). AAV acknowledges funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 817540, ASTROFLOW). VS acknowledges funding from the European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme (grant agreement No. 682393 AWESoMeStars).en
dc.description.abstractStudying cool star magnetic activity gives an important insight into the stellar dynamo and its relationship with stellar properties, as well as allowing us to place the Sun’s magnetism in the context of other stars. Only 61 Cyg A (K5V) and τ Boo (F8V) are currently known to have magnetic cycles like the Sun’s, where the large-scale magnetic field polarity reverses in phase with the star’s chromospheric activity cycles. τ Boo has a rapid ∼240 d magnetic cycle, and it is not yet clear whether this is related to the star’s thin convection zone or if the dynamo is accelerated by interactions between τ Boo and its hot Jupiter. To shed light on this, we studied the magnetic activity of HD 75332 (F7V) which has similar physical properties to τ Boo and does not appear to host a hot Jupiter. We characterized its long term chromospheric activity variability over 53 yrs and used Zeeman Doppler Imaging to reconstruct the large-scale surface magnetic field for 12 epochs between 2007 and 2019. Although we observe only one reversal of the large-scale magnetic dipole, our results suggest that HD 75332 has a rapid ∼1.06 yr solar-like magnetic cycle where the magnetic field evolves in phase with its chromospheric activity. If a solar-like cycle is present, reversals of the large-scale radial field polarity are expected to occur at around activity cycle maxima. This would be similar to the rapid magnetic cycle observed for τ Boo, suggesting that rapid magnetic cycles may be intrinsic to late-F stars and related to their shallow convection zones.
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.rightsCopyright © 2020 the Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1093/mnras/staa3878.en
dc.subjectStars: activityen
dc.subjectStars: magnetic fielden
dc.subjectStars: individual (HD 75332) 1 BACKGROUNDen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subject3rd-DASen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleMagnetic field and chromospheric activity evolution of HD 75332 : a rapid magnetic cycle in an F star without a hot Jupiteren
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.identifier.doihttps://doi.org/10.1093/mnras/staa3878
dc.description.statusPeer revieweden


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