J/MNRAS/452/173ivo://CDS.VizieR/J/MNRAS/452/173doi:10.26093/cds/vizier.74520173CDSBinks A.S.Jeffries R.D.Maxted P.F.L.2024-08-15T20:14:14Z2015-08-21T11:37:20ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starslate-type-starsWe present a kinematically-unbiased search to identify young, nearby low-mass members of kinematic moving groups (MGs). Objects with both rotation periods shorter than 5 days in the SuperWASP All-Sky Survey and X-ray counterparts in the ROSAT All-Sky Survey were chosen to create a catalog of several thousand rapidly-rotating, X-ray active FGK stars. These objects are expected to be either genuinely young (<200Myr) single stars or tidally-locked spectroscopic binaries. We obtained optical spectra for a sub-sample of 146 stars to determine their ages and kinematics, and in some cases repeat radial velocity (RV) measurements were used to identify binarity. Twenty-six stars are found to have lithium abundances consistent with an age of 200Myr or younger and show no evidence for binarity, and in most cases measurements of Halpha and v sin i support their youthful status. Based on their youth, their radial velocities and estimates of their 3-dimensional kinematics, we find 11 objects that may be members of known MGs, 8 that do not appear associated with any young MG and a further 7 that are close to the kinematics of the recently proposed "Octans-Near" MG, and may be the first members of this MG found in the northern hemisphere. The initial search mechanism was ~18 per cent efficient at identifying likely-single stars younger than 200Myr, of which 80 per cent were early-K spectral types. A more complete survey may result in the detection of new nearby MGs, particularly in the comparatively little sampled northern hemisphere.2015MNRAS.452..173Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/452/173CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/452/173https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/452/173http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/452/173https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/452/173https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/452/173http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/452/173GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/452/173/tlspb (Tidally-Locked Short-Period Binary systems (14 sources))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/452/173/tlspb?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/452/173/tlspb?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/452/173/tlspb?GETtext/xml+votable180.050000true4.12370835.77750.005555555555555556Cone search capability for table J/MNRAS/452/173/stars (Stars which are not Tidally-Locked Short-Period Binary systems (106 sources))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/452/173/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/452/173/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/452/173/stars?GETtext/xml+votable180.050000true17.092541731.63363890.0055555555555555566/505 783 931 1057 1257 1267 1358 1526 1538 1542 1556 1761 1769 1771 1786 1893 1965 2145 2227 2322 2476 2614 2839 3162 3166 4845 4863 5049 5054 5063 5114 5399 5458 5552 5706 6244 6406 6502 9221 9227 9311 9320 9404 9422 9506 9558 9570 9616 9637 10071 10253 10469 10513 10520 10634 10788 11015 12340 12400 12463 12504 12514 12650 13414 13457 14882 14943 14984 15011 15087 15258 17706 18062 18431 18758 18929 19340 19479 19902 20025 20086 20162 20318 20392 20430 24039 24272-24273 24283 24334 25502 25807 25922 26791 26954 27997 28080 28103 28123 28386 28526 31281 31893 31970 32462 32545 32614 32706 32736 40877 40883 40896 44743 44854 44888 44917 44955 49062 491207.952274030004205e-20 4.920466254354166e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/452/173?format=asciidefaultJ/MNRAS/452/173/mgsMoving Group datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameMoving group namemeta.id;pos.lgcharNObs[4/48] Number of observationsmeta.numberintAge[3/70] Lower value of Age intervalMyrtime.age;stat.minintB_Age[5/120] Upper value of Age intervalMyrtime.age;stat.maxintn_Age[*] * indicates ages calculated from the lithium depletion boundarymeta.notecharu_Dist[~] Uncertainty flag on Distmeta.code.errorcharDistLower value of distance intervalpcpos.distance;pos.heliocentricintB_Dist? Upper value of distance intervalpcpos.distance;time.interval;stat.maxintnullableUvel? U velocitykm/sphys.veloc;pos.cartesian.xfloatnullablee_Uvelrms uncertainty on Uvelkm/sstat.errorfloatVvel? V velocitykm/sphys.veloc;pos.cartesian.yfloatnullablee_Vvelrms uncertainty on Vvelkm/sstat.errorfloatWvel? W velocitykm/sphys.veloc;pos.cartesian.zfloatnullablee_Wvelrms uncertainty on Wvelkm/sstat.errorfloatX? X positionspcpos.cartesian.x;pos.galacticfloatnullablee_Xrms uncertainty on Xpcstat.error;pos.cartesian.xfloatY? Y positionspcpos.cartesian.y;pos.galacticfloatnullablee_Yrms uncertainty on Ypcstat.error;pos.cartesian.yfloatZ? Z positionspcpos.cartesian.z;pos.galacticfloatnullablee_Zrms uncertainty on Zpcstat.error;src.redshiftfloatRAconv? Convergent point in right ascensiondegpos.eq.ranullableDEconv? convergent point in declinationdegpos.eq.decnullableJ/MNRAS/452/173/tlspbTidally-Locked Short-Period Binary systems (14 sources)SpTSpectral typesrc.spTypecharTeffEffective temperature (4)Kphys.temperature.effectiveintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of Target (SWHHMM+DDMM)meta.id;meta.maincharprimaryl_AgeGLimit flag on AgeG (1)meta.code.errorcharAgeGAge from gyrochronologyMyrtime.ageintl_AgeLiLimit flag on AgeLi (1)meta.code.errorcharAgeLiAge from lithium, or lower value of intervalMyrtime.ageintB_AgeLi? Upper value of lithium age intervalMyrtime.age;stat.maxintnullablel_AgeHaLimit flag on AgeHa (1)meta.code.errorcharAgeHaAge from H{alpha} or lower value of intervalMyrtime.ageintB_AgeHa? Upper value of H{alpha} age intervalMyrtime.age;stat.maxintnullablel_AgeRLimit flag on AgeR (1)meta.code.errorcharAgeRAge from RsiniMyrtime.ageintl_EWLiLimit flag on EWLi (2-{sigma} upper limits)meta.code.errorcharEWLiLithium equivalent width before Fe correction0.1pmarith.factor;spect.line.eqWidthintEWLic? Lithium equivalent width subsequent to deblending the 6707.4 FeI line (m{AA}) (2)0.1pmspect.line.eqWidthintnullablee_EWLic? Error on EWLic calculated using Cayrel de Strobel (1988IAUS..132..345C) formulation0.1pmstat.errorintnullableEWHaH{alpha} equivalent width ({AA}) (3)0.1nmspect.line.eqWidth;em.line.HalphafloatBmagB magnitudemagphot.mag;em.opt.Bfloate_Bmag? rms uncertainty on Bmagmagstat.error;phot.mag;em.opt.BfloatnullableVmagV magnitudemagphot.mag;em.opt.Vfloate_Vmag? rms uncertainty on Vmagmagstat.error;phot.mag;em.opt.VfloatnullableKmag? K magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag? rms uncertainty on Kmagmagstat.error;phot.mag;em.IR.KfloatnullableA(Li)? Lithium abundance, calculated using 12+log(N(Li)/N(H))phys.abundfloatnullableE_A(Li)? 1-{sigma} upper error on A(Li)stat.error;stat.maxfloatnullablee_A(Li)? 1-{sigma} lower error on A(Li)stat.errorfloatnullableNvNumber of Radial Velocity measurementsmeta.numberintpmRAProper motion in right ascensionmas/yrpos.pm;pos.eq.rafloate_pmRArms uncertainty on pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion in declinationmas/yrpos.pm;pos.eq.decfloate_pmDErms uncertainty on pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatPlxParallax calculated photometricallymaspos.parallax;meta.modelledfloatB_Plx? Upper value of parallax when intervalmaspos.parallax;stat.maxfloatnullablee_Plx? rms uncertainty on Plxmasstat.error;pos.parallaxfloatnullableUvel? U velocitykm/sphys.veloc;pos.cartesian.xfloatnullablee_Uvel? First error bar on Uvel from the uncertainties in proper motion and RVkm/sstat.errorfloatnullables_Uvel? Second error bar on Uvel from the distance uncertaintykm/sstat.error;src.morph.paramfloatnullableVvel? V velocitykm/sphys.veloc;pos.cartesian.yfloatnullablee_Vvel? First error bar on Vvel from the uncertainties in proper motion and RVkm/sstat.errorfloatnullables_Vvel? Second error bar on Vvel from the distance uncertaintykm/sstat.error;src.morph.paramfloatnullableWvel? W velocitykm/sphys.veloc;pos.cartesian.zfloatnullablee_Wvel? First error bar on Wvel from the uncertainties in proper motion and RVkm/sstat.errorfloatnullables_Wvel? Second error bar on Wvel from the distance uncertaintykm/sstat.error;src.morph.paramfloatnullableVsini? Projected rotational velocitykm/sphys.veloc.rotatfloatnullablee_Vsini? rms uncertainty on Vsinikm/sstat.error;phys.veloc.rotatfloatnullable1SWASPIdentification in the SuperWASP catalog 1SWASP J (HHMMSS.ss+DDMMSS.s)meta.idcharVmag1V magnitudemagphot.mag;em.opt.VfloatV-KV-K colour indexmagphot.color;em.opt.V;em.IR.Kfloatq_Per[A-C] Quality of period measurement, A=best (section 2 of the paper)meta.code.qualcharPer[0.7/20] Rotation perioddtime.periodfloate_Per[0.002/3.5]? rms uncertainty on Perdstat.errorfloatnullableChisq{Delta}{chi}^2^ value (section 2 of the paper)stat.fit.chi2intNs[1/7] Number of seasonal SuperWASP lightcurves used in determining the rotation periodmeta.noteintDateMonth and year for which spectroscopy was first obtained for the object, J11 = June 2011, D12 = December 2012time.epochcharCR[0.03/0.4] X-ray count rates**-1phot.count;em.X-rayfloatHR1[-1/1] Hardness ratio 1phot.flux;arith.ratiofloatlogLx/b[-4/-2.9] Base 10 logarithm of the fractional X-ray to bolometric luminosityphys.luminosity;arith.ratiofloat_RAPositions from 1SWASP name (right ascension part)degpos.eq.ra;meta.main_DEPositions from 1SWASP name (declination part)degpos.eq.dec;meta.mainJ/MNRAS/452/173/starsStars which are not Tidally-Locked Short-Period Binary systems (106 sources)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of Target (SWHHMM+DDMM)meta.id;meta.maincharprimaryl_AgeGLimit flag on AgeG (1)meta.code.errorcharAgeGAge from gyrochronologyMyrtime.ageintl_AgeLiLimit flag on AgeLi (1)meta.code.errorcharAgeLiAge from lithium, or lower value of intervalMyrtime.ageintB_AgeLi? Upper value of lithium age intervalMyrtime.age;stat.maxintnullablel_AgeHaLimit flag on AgeHa (1)meta.code.errorcharAgeHaAge from H{alpha} or lower value of intervalMyrtime.ageintB_AgeHa? Upper value of H{alpha} age intervalMyrtime.age;stat.maxintnullablel_AgeRLimit flag on AgeR (1)meta.code.errorcharAgeRAge from RsiniMyrtime.ageintl_EWLiLimit flag on EWLi (2-{sigma} upper limits)meta.code.errorcharEWLiLithium equivalent width before Fe correction0.1pmarith.factor;spect.line.eqWidthintEWLic? Lithium equivalent width subsequent to deblending the 6707.4 FeI line (m{AA}) (2)0.1pmspect.line.eqWidthintnullablee_EWLic? Error on EWLic calculated using Cayrel de Strobel (1988IAUS..132..345C) formulation0.1pmstat.errorintnullableEWHaH{alpha} equivalent width ({AA}) (3)0.1nmspect.line.eqWidth;em.line.HalphafloatBmagB magnitudemagphot.mag;em.opt.Bfloate_Bmag? rms uncertainty on Bmagmagstat.error;phot.mag;em.opt.BfloatnullableVmagV magnitudemagphot.mag;em.opt.Vfloate_Vmag? rms uncertainty on Vmagmagstat.error;phot.mag;em.opt.VfloatnullableKmag? K magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag? rms uncertainty on Kmagmagstat.error;phot.mag;em.IR.KfloatnullableTeffEffective temperature (4)Kphys.temperature.effectiveintSpTSpectral typesrc.spTypecharA(Li)? Lithium abundance, calculated using 12+log(N(Li)/N(H))phys.abundfloatnullableE_A(Li)? 1-{sigma} upper error on A(Li)stat.error;stat.maxfloatnullablee_A(Li)? 1-{sigma} lower error on A(Li)stat.errorfloatnullableNvNumber of Radial Velocity measurementsmeta.numberintpmRAProper motion in right ascensionmas/yrpos.pm;pos.eq.rafloate_pmRArms uncertainty on pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion in declinationmas/yrpos.pm;pos.eq.decfloate_pmDErms uncertainty on pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatPlxParallax calculated photometricallymaspos.parallax;meta.modelledfloatB_Plx? Upper value of parallax when intervalmaspos.parallax;stat.maxfloatnullablee_Plx? rms uncertainty on Plxmasstat.error;pos.parallaxfloatnullableVsini? Projected rotational velocitykm/sphys.veloc.rotatfloatnullablee_Vsini? rms uncertainty on Vsinikm/sstat.error;phys.veloc.rotatfloatnullable1SWASPIdentification in the SuperWASP catalog 1SWASP J (HHMMSS.ss+DDMMSS.s)meta.idcharVmag1V magnitudemagphot.mag;em.opt.VfloatV-KV-K colour indexmagphot.color;em.opt.V;em.IR.Kfloatq_Per[A-C] Quality of period measurement, A=best (section 2 of the paper)meta.code.qualcharPer[0.7/20] Rotation perioddtime.periodfloate_Per[0.002/3.5]? rms uncertainty on Perdstat.errorfloatnullableChisq{Delta}{chi}^2^ value (section 2 of the paper)stat.fit.chi2intNs[1/7] Number of seasonal SuperWASP lightcurves used in determining the rotation periodmeta.noteintDateMonth and year for which spectroscopy was first obtained for the object, J11 = June 2011, D12 = December 2012time.epochcharCR[0.03/0.4] X-ray count rates**-1phot.count;em.X-rayfloatHR1[-1/1] Hardness ratio 1phot.flux;arith.ratiofloatlogLx/b[-4/-2.9] Base 10 logarithm of the fractional X-ray to bolometric luminosityphys.luminosity;arith.ratiofloat_RAPositions from 1SWASP name (right ascension part)degpos.eq.ra;meta.main_DEPositions from 1SWASP name (declination part)degpos.eq.dec;meta.mainJ/MNRAS/452/173/rvsRadial velocities (for the 106 sources)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of Target (SWHHMM+DDMM)meta.id;meta.maincharHJDHeliocentric Julian Date (HJD-2450000)dtime.epochdoubleRVi? Individual radial velocity measurementkm/sphys.veloc;pos.heliocentricfloatnullablee_RVi? rms uncertainty on RVikm/sstat.errorfloatnullablen_RVi[i] i indicates measurements made using the Isaac Newton Telescopemeta.notecharRVf? Final radial velocity measurementkm/sphys.veloc;pos.heliocentricfloatnullablee_RVf? rms uncertainty on RVfkm/sstat.errorfloatnullableBin[1/5] Binary score (1)meta.code.multipintJ/MNRAS/452/173/rvs_bRadial velocities of TLSPB systems (for the 14 sources)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of Target (SWHHMM+DDMM)meta.id;meta.maincharHJDHeliocentric Julian Date (HJD-2450000)dtime.epochdoubleRVi? Individual radial velocity measurementkm/sphys.veloc;pos.heliocentricfloatnullablee_RVi? rms uncertainty on RVikm/sstat.errorfloatnullablen_RVi[i] i indicates measurements made using the Isaac Newton Telescopemeta.notecharRVf? Final radial velocity measurementkm/sphys.veloc;pos.heliocentricfloatnullablee_RVf? rms uncertainty on RVfkm/sstat.errorfloatnullableBin[1/5] Binary score (1)meta.code.multipint