J/A+A/592/A156ivo://CDS.VizieR/J/A+A/592/A156doi:10.26093/cds/vizier.35920156CDSdos Santos L.A.Melendez J.do Nascimento J.-D.JrBedell M.,Ramirez I.Bean J.L.Asplund M.Spina L.Dreizler S.Alves-Brito A.,Casagrande L.2017-12-12T14:45:28Z2016-08-24T08:25:18ZCDS support team

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

cds-question@unistra.frg-starsIt is still unclear how common the Sun is when compared to other similar stars in regards to some of its physical properties, such as rotation. Considering that gyrochronology relations are widely used today to estimate ages of stars in the main sequence, and that the Sun is used to calibrate it, it is crucial to assess whether these procedures are acceptable. We analyze the rotational velocities, limited by the unknown rotation axis inclination angle, of an unprecedented large sample of solar twins to study the rotational evolution of Sun-like stars, and assess whether the Sun is a typical rotator. We used high-resolution (R=115000) spectra obtained with the HARPS spectrograph and the 3.6m telescope at La Silla Observatory. The projected rotational velocities for 81 solar twins were estimated by line profile fitting with synthetic spectra. Macroturbulence velocities were inferred from a prescription that accurately reflects their dependence with effective temperature and luminosity of the stars. Our sample of solar twins include some spectroscopic binaries with enhanced rotational velocities, and we do not find any nonspectroscopic binaries with unusually high rotation velocities. We verified that the Sun does not have a peculiar rotation, but the solar twins exhibit rotational velocities that depart from the Skumanich relation. The Sun is a regular rotator when compared to solar twins with a similar age. Additionally, we obtain a rotational braking law that better describes the stars in our sample (v{prop.to}t^-0.6^) in contrast to previous, often-used scalings.2016A&A...592A.156Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/592/A156CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/592/A156https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/592/A156http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/592/A156https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/592/A156https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/592/A156http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/592/A156GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/592/A156/table3 (Stellar ages, parameters and velocities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/592/A156/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/592/A156/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/592/A156/table3?GETtext/xml+votable180.050000true6/222 548 4128 4206 4313 4665 8244 8286 8614 8792 12312 12890 17301 17341 17572 17587 17721 17929 18209 18373 19491 21114 21177 21516 23429 23583 23661 23780 23873 25854 26160 26496 26888 27254 29422 29900 30878 30894 31029 31433 31945 33252 34983 35954 36453 36517 36590 36635 37515 37944 38279 38562 39557 39570 39576 39693 39801 39854 40105 40892 41935 42157 42228 42887 43105 43327 43845 43929 43989 44131 45182 46056 46193 46681 46734 46933 47137 47194 48310 48607 49114https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/592/A156?format=asciiOpticaldefaultJ/A+A/592/A156/table3Stellar ages, parameters and velocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarHipparcos Catalogue name and Sunmeta.id;meta.tablecharAgeStellar ageGyrtime.agefloate_AgeError of the stellar ageGyrstat.error;time.agefloatvsiniProjected rotational velocitykm/sphys.veloc.rotatfloate_vsiniError of the projected rotational velocitykm/sstat.error;phys.veloc.rotatfloat[Fe/H]Metallicityphys.abund.Zfloate_[Fe/H]Error of the metallicitystat.error;phys.abund.FefloatTeffEffective temperatureKphys.temperature.effectiveinte_TeffError of the effective temperatureKstat.error;phys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloate_loggError of the surface gravitylog(cm.s**-2)stat.errorfloatvtMicroturbulence velocitykm/sphys.veloc.microTurbfloate_vtError of the microturbulence velocitykm/sstat.errorfloatvmacroMacroturbulence velocitykm/sphys.velocfloatNoteSpecific note about the star (1)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions form Simbad (right ascension part)degpos.eq.ra;meta.mainnullable_DEPositions form Simbad (declination part)degpos.eq.dec;meta.mainnullable