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dc.contributor.authorSee, Wyke Chun Victor
dc.contributor.authorJardine, M.
dc.contributor.authorVidotto, A.A.
dc.contributor.authorMarsden, S.C.
dc.contributor.authorJeffers, S.V.
dc.contributor.authorDo Nascimento, J.D.
dc.date.accessioned2014-12-04T15:31:03Z
dc.date.available2014-12-04T15:31:03Z
dc.date.issued2014-10
dc.identifier.citationSee , W C V , Jardine , M , Vidotto , A A , Marsden , S C , Jeffers , S V & Do Nascimento , J D 2014 , ' The effects of stellar winds on the magnetospheres and potential habitability of exoplanets ' , Astronomy & Astrophysics , vol. 570 , A99 . https://doi.org/10.1051/0004-6361/201424323en
dc.identifier.issn0004-6361
dc.identifier.otherPURE: 157755771
dc.identifier.otherPURE UUID: a17c641a-a6ca-4362-9c03-26afed1aade0
dc.identifier.otherScopus: 84908546035
dc.identifier.otherWOS: 000344158500102
dc.identifier.otherORCID: /0000-0002-1466-5236/work/57821901
dc.identifier.urihttp://hdl.handle.net/10023/5868
dc.descriptionV.S. acknowledges the support of an STFC studentship. A.A.V. acknowledges support from a Royal Astronomical Society Fellowship and an Ambizione Fellowship from the Swiss National Science Foundation. S.V.J. acknowledges research funding by the Deutsche Forschungsgemeinschaft (DFG) under grant SFB 963/1, project A16.en
dc.description.abstractContext. The principle definition of habitability for exoplanets is whether they can sustain liquid water on their surfaces, i.e. that they orbit within the habitable zone. However, the planet’s magnetosphere should also be considered, since without it, an exoplanet’s atmosphere may be eroded away by stellar winds.Aims. The aim of this paper is to investigate magnetospheric protection of a planet from the effects of stellar winds from solar-mass stars.Methods. We study hypothetical Earth-like exoplanets orbiting in the host star’s habitable zone for a sample of 124 solar-mass stars. These are targets that have been observed by the Bcool Collaboration. Using two wind models, we calculate the magnetospheric extent of each exoplanet. These wind models are computationally inexpensive and allow the community to quickly estimate the magnetospheric size of magnetised Earth-analogues orbiting cool stars.Results. Most of the simulated planets in our sample can maintain a magnetosphere of ~5 Earth radii or larger. This suggests that magnetised Earth analogues in the habitable zones of solar analogues are able to protect their atmospheres and is in contrast to planets around young active M dwarfs. In general, we find that Earth-analogues around solar-type stars, of age 1.5 Gyr or older, can maintain at least a Paleoarchean Earth sized magnetosphere. Our results indicate that planets around 0.6–0.8 solar-mass stars on the low activity side of the Vaughan-Preston gap are the optimum observing targets for habitable Earth analogues.
dc.format.extent10
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysicsen
dc.rightsReproduced with permission from Astronomy & Astrophysics, © ESO. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at http://dx.doi.org/10.1051/0004-6361/201424323en
dc.subjectPlanets and satellites: magnetic fieldsen
dc.subjectPlanet-star interactionsen
dc.subjectStars: low-massen
dc.subjectStars: mass-lossen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleThe effects of stellar winds on the magnetospheres and potential habitability of exoplanetsen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.identifier.doihttps://doi.org/10.1051/0004-6361/201424323
dc.description.statusPeer revieweden


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