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dc.contributor.authorRibas, I.
dc.contributor.authorTuomi, M.
dc.contributor.authorReiners, A.
dc.contributor.authorButler, R. P.
dc.contributor.authorMorales, J. C.
dc.contributor.authorPerger, M.
dc.contributor.authorDreizler, S.
dc.contributor.authorRodríguez-López, C.
dc.contributor.authorHernández, J. I. González
dc.contributor.authorRosich, A.
dc.contributor.authorFeng, F.
dc.contributor.authorTrifonov, T.
dc.contributor.authorVogt, S. S.
dc.contributor.authorCaballero, J. A.
dc.contributor.authorHatzes, A.
dc.contributor.authorHerrero, E.
dc.contributor.authorJeffers, S. V.
dc.contributor.authorLafarga, M.
dc.contributor.authorMurgas, F.
dc.contributor.authorRodríguez, E.
dc.contributor.authorStrachan, J. B. P.
dc.contributor.authorTal-Or, L.
dc.contributor.authorTeske, J.
dc.contributor.authorToledo-Padrón, B.
dc.contributor.authorZechmeister, M.
dc.contributor.authorQuirrenbach, A.
dc.contributor.authorAmado, P. J.
dc.contributor.authorAzzaro, M.
dc.contributor.authorBéjar, V. J. S.
dc.contributor.authorBarnes, J. R.
dc.contributor.authorBerdiñas, Z. M.
dc.contributor.authorColeman, G.
dc.contributor.authorCortés-Contreras, M.
dc.contributor.authorCrane, J.
dc.contributor.authorEngle, S. G.
dc.contributor.authorGuinan, E. F.
dc.contributor.authorHaswell, C. A.
dc.contributor.authorHenning, Th
dc.contributor.authorHolden, B.
dc.contributor.authorJones, H. R. A.
dc.contributor.authorKaminski, A.
dc.contributor.authorKiraga, M.
dc.contributor.authorKürster, M.
dc.contributor.authorLópez-González, M. J.
dc.contributor.authorMontes, D.
dc.contributor.authorMorin, J.
dc.contributor.authorOfir, A.
dc.contributor.authorPallé, E.
dc.contributor.authorRebolo, R.
dc.contributor.authorReffert, S.
dc.contributor.authorSchweitzer, A.
dc.contributor.authorSeifert, W.
dc.contributor.authorShectman, S. A.
dc.contributor.authorStaab, D.
dc.contributor.authorStreet, R. A.
dc.contributor.authorMascareño, A. Suárez
dc.contributor.authorTsapras, Y.
dc.contributor.authorAnglada-Escudé, G.
dc.date.accessioned2019-02-21T10:10:02Z
dc.date.available2019-02-21T10:10:02Z
dc.date.issued2018-11-15
dc.identifier.citationRibas , I , Tuomi , M , Reiners , A , Butler , R P , Morales , J C , Perger , M , Dreizler , S , Rodríguez-López , C , Hernández , J I G , Rosich , A , Feng , F , Trifonov , T , Vogt , S S , Caballero , J A , Hatzes , A , Herrero , E , Jeffers , S V , Lafarga , M , Murgas , F , Rodríguez , E , Strachan , J B P , Tal-Or , L , Teske , J , Toledo-Padrón , B , Zechmeister , M , Quirrenbach , A , Amado , P J , Azzaro , M , Béjar , V J S , Barnes , J R , Berdiñas , Z M , Coleman , G , Cortés-Contreras , M , Crane , J , Engle , S G , Guinan , E F , Haswell , C A , Henning , T , Holden , B , Jones , H R A , Kaminski , A , Kiraga , M , Kürster , M , López-González , M J , Montes , D , Morin , J , Ofir , A , Pallé , E , Rebolo , R , Reffert , S , Schweitzer , A , Seifert , W , Shectman , S A , Staab , D , Street , R A , Mascareño , A S , Tsapras , Y & Anglada-Escudé , G 2018 , ' A candidate super-Earth planet orbiting near the snow line of Barnard's star ' , Nature , vol. 563 , no. 7731 , pp. 365-368 . https://doi.org/10.1038/s41586-018-0677-y
dc.identifier.issn0028-0836
dc.identifier.otherPURE: 15985969
dc.identifier.otherPURE UUID: 5d9f1531-0075-4b2e-a5e3-94f435005ba9
dc.identifier.otherArXiv: http://arxiv.org/abs/1811.05955v2
dc.identifier.otherScopus: 85056565793
dc.identifier.urihttp://hdl.handle.net/2299/21132
dc.description38 pages, 7 figures, 4 tables, author's version of published paper in Nature journal
dc.description.abstractBarnard’s star is a red dwarf, and has the largest proper motion (apparent motion across the sky) of all known stars. At a distance of 1.8 parsecs, it is the closest single star to the Sun; only the three stars in the α Centauri system are closer. Barnard’s star is also among the least magnetically active red dwarfs known and has an estimated age older than the Solar System. Its properties make it a prime target for planetary searches; various techniques with different sensitivity limits have been used previously, including radial-velocity imaging, astrometry and direct imaging, but all ultimately led to negative or null results. Here we combine numerous measurements from high-precision radial-velocity instruments, revealing the presence of a low-amplitude periodic signal with a period of 233 days. Independent photometric and spectroscopic monitoring, as well as an analysis of instrumental systematic effects, suggest that this signal is best explained as arising from a planetary companion. The candidate planet around Barnard’s star is a cold super-Earth, with a minimum mass of 3.2 times that of Earth, orbiting near its snow line (the minimum distance from the star at which volatile compounds could condense). The combination of all radial-velocity datasets spanning 20 years of measurements additionally reveals a long-term modulation that could arise from a stellar magnetic-activity cycle or from a more distant planetary object. Because of its proximity to the Sun, the candidate planet has a maximum angular separation of 220 milliarcseconds from Barnard’s star, making it an excellent target for direct imaging and astrometric observations in the future.en
dc.format.extent4
dc.language.isoeng
dc.relation.ispartofNature
dc.rights/dk/atira/pure/core/openaccesspermission/embargoed
dc.subjectastro-ph.EP
dc.subjectastro-ph.SR
dc.subjectGeneral
dc.titleA candidate super-Earth planet orbiting near the snow line of Barnard's staren
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionCentre of Data Innovation Research
dc.description.statusPeer reviewed
dc.date.embargoedUntil2019-05-14
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85056565793&partnerID=8YFLogxK
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2018-10-01
rioxxterms.versionAM
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1038/s41586-018-0677-y
rioxxterms.licenseref.startdate2019-05-14+01:00
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.date.embargo2019-05-14+01:00
herts.rights.accesstypeembargoedAccess


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