J/A+A/657/L3ivo://CDS.VizieR/J/A+A/657/L3doi:10.26093/cds/vizier.36579003CDSMessina S.Nardiello D.Desidera S.Baratella M.Benatti S.Biazzo K.,D'Orazi V.2023-11-07T09:08:05Z2022-04-20T08:09:06ZCDS support team

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

cds-question@unistra.frstellar-associationsphotometryGyrochronology is one of the methods currently used to estimate the age of stellar open clusters. Hundreds of new clusters, associations, and moving groups unveiled by Gaia and complemented by accurate rotation period measurements provided by recent space missions such as Kepler and TESS are allowing us to significantly improve the reliability of this method. Aims. We use gyrochronology, that is, the calibrated age-mass-rotation relation valid for low-mass stars, to measure the age of the recently discovered moving group Group X. We extracted the light curves of all candidate members from the TESS full frame images and measured their rotation periods using different period search methods. Results. We measured the rotation period of 168 of a total of 218 stars and compared their period-colour distribution with those of two age-benchmark clusters, the Pleiades (125Myr) and Praesepe (625Myr), as well as with the recently characterised open cluster NGC 3532 (300Myr). As result of our analysis, we derived a gyro age of 300+/-60Myr. We also applied as independent methods the fitting of the entire isochrone and of the three brightest candidate members individually with the most precise stellar parameters, deriving comparable values of 250 Myr and 290 Myr, respectively. Our dating of Group X allows us to definitively rule out the previously proposed connection with the nearby but much older Coma Berenices cluster.2022A&A...657L...3Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/657/L3CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/862/106 : Stellar and substellar members in Coma Berenices (Tang+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/657/L3https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/657/L3http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/657/L3https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/657/L3https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/657/L3http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/657/L3GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/657/L3/tablea1 (Rotation periods of Group X candidate members)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/657/L3/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/657/L3/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/657/L3/tablea1?GETtext/xml+votable180.050000true193.693350649.16958890.0055555555555555565/2769 2868 6/9851 9969 9976 9979 9982-9983 10018 10646 10653 10684 10694 10703 10710-10711 10715-10717 10724 10726 10741 10743-10745 10747-10749 10877 11011 11025 11029 11031 11051 11088-11090 11094 11096-11097 11099 11103 11105 11107 11109 11115 11126 11132-11133 11205 11221 11323 11333 11345-11348 11350-11351 11356 11358 11361 11364 11367 11372 11374-11375 11378-11379 11382 11393 11400 11402 11406 11408 11410 11412 11417 11419 11421 11424 11426 11430-11431 11437-11439 11444 11449 11451 11453-11454 11459-11460 11462 11467 11469-11471 11476 11478 11482 11489-11492 11494 11498-11500 11502 11512 11515 11680 11691 11779 11789-11790 11795 11798 11800 11809 11815 11818 11832 11841 11844 11848 118531.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/657/L3?format=asciidefaultJ/A+A/657/L3/tablea1Rotation periods of Group X candidate membersPerPerioddtime.periodfloatGmagGaia G magnitudemagphot.mag;em.optfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint(G-K)0Deredenned G-K colour indexmagphot.color;em.opt;em.IRfloatSeqSequential numbermeta.recordintn_Seq[* a] Note on Seq (1)meta.notecharTICTIC numbermeta.id;meta.mainn_Per[*] Note on Per (2)meta.notechare_PerPeriod errordstat.errorfloatGradeconfidence grademeta.code.qualcharSectTESS Sectorsobs.fieldcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositios from TIC (IV/38) (right ascension part)degpos.eq.ra;meta.main_DEPositios from TIC (IV/38) (declination part)degpos.eq.dec;meta.main