J/MNRAS/441/2361ivo://CDS.VizieR/J/MNRAS/441/2361doi:10.26093/cds/vizier.74412361CDSVidotto A.A.Gregory S.G.Jardine M.Donati J.F.Petit P.Morin J.,Folsom C.P.Bouvier J.Cameron A.C.Hussain G.Marsden S.Waite I.A.,Fares R.Jeffers S.Do Nascimento J.D.JR2024-08-09T20:15:02Z2016-08-08T08:36:33ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmultiple-starsmagnetic-fieldsWe investigate how the observed large-scale surface magnetic fields of low-mass stars (~0.1-2M_{sun}_), reconstructed through Zeeman-Doppler imaging, vary with age t, rotation and X-ray emission. Our sample consists of 104 magnetic maps of 73 stars, from accreting pre-main sequence to main-sequence objects (1Myr<~t<~10Gyr). For non-accreting dwarfs we empirically find that the unsigned average large-scale surface field is related to age as t^-0.655+/-0.045^. This relation has a similar dependence to that identified by Skumanich, used as the basis for gyrochronology. Likewise, our relation could be used as an age-dating method ('magnetochronology'). The trends with rotation we find for the large-scale stellar magnetism are consistent with the trends found from Zeeman broadening measurements (sensitive to large- and small-scale fields). These similarities indicate that the fields recovered from both techniques are coupled to each other, suggesting that small- and large-scale fields could share the same dynamo field generation processes. For the accreting objects, fewer statistically significant relations are found, with one being a correlation between the unsigned magnetic flux and rotation period. We attribute this to a signature of star-disc interaction, rather than being driven by the dynamo.2014MNRAS.441.2361Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/441/2361CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/441/2361https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/441/2361http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/441/2361https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/441/2361https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/441/2361http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/441/2361GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/441/2361/table1 (Stars with magnetic field measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/441/2361/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/441/2361/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/441/2361/table1?GETtext/xml+votable180.050000true9.840857821.25047440.0055555555555555566/129 462 496 684 1048 1050 1171 3715 4444 5000 5074 5088 5534 6325 7763 8440 8627 8790 8843 11856 12592 12983 13301 13451 13743 14650 14772 18373 19912 20071 22252 22289 22964 23230 24151 24160 25939 26555 26997 27762 28341 28605 28746 29999 30419 30477 30878 32147 32617 33116 34757 36578 36697 36956-36957 38382 40101 40784 40892 40932 42601 42714 42981 43017 44439 48061 48105 48905https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/441/2361?format=asciidefaultJ/MNRAS/441/2361/table1Stars with magnetic field measurementsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGroup[1/6] Group (1)meta.codeintStarStar namemeta.id;meta.maincharn_StarNote for Sunmeta.notecharSpTypeSpectral typesrc.spTypecharMassStellar masssolMassphys.massfloatRadiusStellar radiussolRadphys.size.radiusfloatProtStellar rotation perioddtime.periodfloatl_RoLimit flag on Rometa.code.errorcharRo? Stellar rossby numberstat.paramfloatnullableAge? Stellar ageMyrtime.agefloatnullablelog10(LX)? Log10 of X-ray luminosity in erg/slog(1e-07W)phys.luminosity;em.X-rayfloatnullablelog10(LX/Lbol)? Log10 of X-ray-to-bolometric luminosities ratiophys.luminosity;arith.ratiofloatnullable<|BV|>Average large-scale unsigned surface magnetic fieldphys.magFielddoubleObs.EpochObservation epoch of stellar magnetic field (YYYY or YYY MMM)time.epochcharRefReference bibcode for the values compiled in this table (2)meta.bib.bibcodechar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainnullable_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainnullable