J/AJ/159/105ivo://CDS.VizieR/J/AJ/159/105doi:10.26093/cds/vizier.51590105CDSLiu J.Fang M.Liu C.2022-11-04T07:43:24Z2020-05-14T13:05:00ZCDS support team

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

cds-question@unistra.frstellar-associationspre-main-sequence-starsstellar-distancestellar-spectral-typesradial-velocityproper-motionsvisible-astronomyIn this work we report the discovery of two new stellar associations in close vicinity of the Sun at roughly 180 and 150pc. These two associations, u-Tau assoc and e-Tau assoc, were detected based on their clustering in a multi-dimensional parameter space including {alpha}, {delta}, {mu}_{alpha}_, {mu}_{delta}_, and \bar{omega} of Gaia. The fitting of pre-main-sequence model isochrones in their color-magnitude diagrams suggests that the two associations are of about 50Myr old and the group members lower than ~0.8M_{sun}_ are at the stage of post-T Tauri.2020AJ....159..105Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/159/105CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)I/345 : Gaia DR2 (Gaia Collaboration, 2018)V/164 : LAMOST DR5 catalogs (Luo+, 2019)J/A+A/446/485 : New very low-mass members in Taurus (Guieu+, 2006)J/ApJS/173/104 : Stellar population in Chamaeleon I (Luhman, 2007)J/MNRAS/410/190 : Young runaway stars within 3kpc (Tetzlaff+, 2011)J/ApJ/750/99 : The Pan-STARRS1 photometric system (Tonry+, 2012)J/ApJ/784/126 : IR photometry of all known members in Taurus (Esplin+, 2014)J/MNRAS/447/1267 : Low-mass members of the Octans association (Murphy+, 2015)J/ApJ/831/116 : Photmetry & spectroscopy PMS stars in NGC 2264 (Lim+, 2016)J/AJ/154/134 : Planetary-mass brown dwarfs in the Taurus SFR (Esplin+,2017)J/AJ/154/46 : PM and photometry for members of Cha I (Esplin+, 2017)J/AJ/153/188 : Spectro. of foreground population in Orion A (Fang+, 2017)J/A+A/601/A19 : Gaia DR1 open cluster members (Gaia Collaboration+, 2017)J/A+A/599/A14 : Taurus ultra-wide pairs (Joncour+, 2017)J/ApJ/838/150 : The Taurus-Auriga ecosystem. I. (Kraus+, 2017)J/AJ/153/46 : Spectroscopy of candidate members in Taurus (Luhman+, 2017)J/AJ/153/257 : Comoving stars in Gaia DR1 (Oh+, 2017)J/ApJ/856/23 : BANYAN. XI. The BANYAN {Sigma} algorithm (Gagne+, 2018)J/ApJ/859/33 : GOBELINS. IV. VLBA obs. of Taurus (Galli+, 2018)J/AJ/156/271 : The stellar membership of the Taurus SFR (Luhman, 2018)J/A+A/624/L11 : Coma Berenices neighbor moving group (Fuernkranz+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/159/105https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/159/105http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/159/105https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/159/105https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/159/105http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/159/105GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/159/105/members (Members of u-Tau (Table 1) and e-Tau (Table 2) associations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/159/105/members?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/159/105/members?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/159/105/members?GETtext/xml+votable180.050000true51.7364.0430.0055555555555555565/64 5815 5820 6/67 71 77 80-81 84-85 87 92 260 262-264 268 270 272 280-281 283 289 295 297 300-301 305 308 310 312-314 362 406 23162 23237 23239 23244 23247 23249 23252 23257 23265 23268-23269 23271-23272 23277 23284-23286 23289-23290 23292-23293 23295 23343 23426-23427 23430-23433 23435-23436 23438-23439 23442 23449 23457-23462 23464 23466-23469 23471 23480 23482https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/159/105?format=asciiOpticaldefaultJ/AJ/159/105/membersMembers of u-Tau (Table 1) and e-Tau (Table 2) associationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAssocu: u-Tau association members or e: e-Tau association membersmeta.id.parentcharGaiaGaia DR2 designation (<Gaia DR2 NNNNNNNNNNNNNNNNNNN> in Simbad)meta.id;meta.mainONameOther namemeta.idcharRAJ2000[50.5/65] Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[2.1/19.2] Declination (J2000)degpos.eq.dec;meta.mainpmRA[19.7/28.2] Gaia DR2 proper motion in RAmas/yrpos.pm;pos.eq.rafloatpmDE[-28/-12] Gaia DR2 proper motion in DECmas/yrpos.pm;pos.eq.decfloatDist[119/201] Heliocentric distancepcpos.distancefloatRV[-36/43]? Gaia DR2 radial velocitykm/sphys.veloc;pos.heliocentricfloatnullableSpType? MK spectral typesrc.spTypecharLAMOSTDisplay data from LAMOST DR4 (V/153) and DR5 (V/164) within 5"meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar