J/A+A/433/151ivo://CDS.VizieR/J/A+A/433/151doi:10.26093/cds/vizier.34330151CDSZickgraf F.-J.Krautter J.Reffert S.Alcala J.M.Mujica R.Covino E.,Sterzik M.F.2023-12-21T16:31:58Z2006-12-12T16:27:00ZCDS support team

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

cds-question@unistra.frx-ray-sourceslate-type-starschemical-abundancesradial-velocityproper-motionsWe present results of an investigation of the X-ray properties, age distribution, and kinematical characteristics of a high-galactic latitude sample of late-type field stars selected from the ROSAT All-Sky Survey (RASS). The sample comprises 254 RASS sources with optical counterparts of spectral types F to M distributed over six study areas located at |b|>~20{deg}, and Dec>=-9{deg}. A detailed study was carried out for the subsample of ~200 G, K, and M stars. Lithium abundances were determined for 179 G-M stars. Radial velocities were measured for most of the 141 G and K type stars of the sample. Combined with proper motions these data were used to study the age distribution and the kinematical properties of the sample. Based on the lithium abundances half of the G-K stars were found to be younger than the Hyades (660Myr). About 25% are comparable in age to the Pleiades (100Myr). A small subsample of 10 stars is younger than the Pleiades. They are therefore most likely pre-main sequence stars. Kinematically the PMS and Pleiades-type stars appear to form a group with space velocities close to the Castor moving group but clearly distinct from the Local Association.2005A&A...433..151Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/433/151CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/117/319 : Northern RASS X-ray sources catalog (Appenzeller+ 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/433/151https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/433/151http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/433/151https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/433/151https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/433/151http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/433/151GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/433/151/tablea234 (All parameters (kinematics, X-ray and optical) of the G-, K-, and M-type stars in ROSAT All-Sky Survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/433/151/tablea234?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/433/151/tablea234?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/433/151/tablea234?GETtext/xml+votable180.050000true52.0620834.1633330.0055555555555555566/69 7034-7035 7037 7356 7359 7402 7686 7689 7692 7700 7705 7724 7728 7731 7739 7742 7744 7747 7751 7753 7757 7768 7779 7781 7793 7796 7800 7808 7811-7812 7819 7830 7832 7834 7840 7874-7875 10794 10880 11643 11718 11721 11724-11725 11727-11728 11730 11732 11736-11737 11739 11744 11750-11751 11756 11758 11760-11761 11764 11768 12569 19067 19156 19163-19164 19212 19214 19224 19230 19242 19246 19259 19262 19308 19340 19346 19354 19358 19361 19376-19377 19393 19399 19401 19411 19414 19417 19432 23071 23094 23098 23100-23101 23111 23122 23131-23132 23136-23137 23139 23142 23152 23155 23158 23165-23166 23189 23233 23240 23242-23243 23246-23247 23250 23253 23259 23262 23265-23266 23272-23273 23282 23290 23293 23342 23424 23426 23429 23432 23438 23443 23457 26719 26736 26739 26749 26782-26783 26822 26830 26834 26848 26851 26866 26876 26878 26912 26920-26921 26924 27021-27022 27032 27040 27047 27055-27056 27068 27218 27392 27394 27396 28477 28483 28519 28526 28528 28541 28615 28634 28639 286603.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/433/151?format=asciiX-raydefaultJ/A+A/433/151/tablea234All parameters (kinematics, X-ray and optical) of the G-, K-, and M-type stars in ROSAT All-Sky Survey[ATZ98]Source namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPapIIIData from paper III (J/ApJS/117/319)meta.ref.urlcharRXJRASS name (RX JHHMM.m+DDMM)meta.idcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainSpTypeMK spectral typesrc.spTypecharSBSpectroscopic binary type (SB2 or SB3)src.classcharVmag? V magnitudemagphot.mag;em.opt.VfloatnullablelogFx/Fv? X to visual flux ratiophot.flux;arith.ratiofloatnullableDist? Heliocentric distancepcpos.distanceintnullableu_DistUncertainty flag on Diatmeta.code.errorcharn_Dist[MISTH] Method from which the distance was calculated (1)meta.notecharlogLx? X-ray luminosity calculated using the distance Dist1e-07Wphys.luminosity;em.X-rayfloatnullableHRV1? Heliocentric radial velocity (of the primary for binaries)km/sspect.dopplerVeloc;pos.heliocentricintnullablee_HRV1? rms uncertainty on HRV1km/sstat.errorintnullableHRV2? Heliocentric radial velocity of the secondary for binarieskm/sspect.dopplerVeloc;pos.heliocentricintnullablee_HRV2? rms uncertainty on HRV2km/sstat.errorintnullablepmRA? Proper motion, {mu}_{alpha}_cos{delta}mas/yrpos.pm;pos.eq.rafloatnullablee_pmRA? rms uncertainty on pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE? Proper motion, {mu}_{delta}_mas/yrpos.pm;pos.eq.decfloatnullablee_pmDE? rms uncertainty on pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatnullabler_pmRASource of the proper motion (1)meta.ref;pos.pm;pos.eq.racharUVel? U velocitykm/sphys.veloc;pos.cartesian.xfloatnullablee_UVel? rms uncertainty on UVelkm/sstat.errorfloatnullableVVel? V velocitykm/sphys.veloc;pos.cartesian.yfloatnullablee_VVel? rms uncertainty on VVelkm/sstat.errorfloatnullableWVel? W velocitykm/sphys.veloc;pos.cartesian.zfloatnullablee_WVel? rms uncertainty on WVelkm/sstat.errorfloatnullableTeffEffective temperatureKphys.temperature.effectiveintl_EWLimit flag on EWmeta.code.error;spect.line.eqWidthcharEW? LiI (6708{AA}) equivalent width0.1pmspect.line.eqWidthintnullableRes[hlm-] (h)igh, (m)edium or (l)ow resolution spectroscopymeta.notecharl_logN(Li)Limit flag on logN(Li)meta.code.errorcharlogN(Li)? Li abundance (H=12)phys.abundfloatnullablel_vrot1Limit flag on vrot1meta.code.errorcharvrot1? Rotational velocity (of the primary for binaries)km/sphys.veloc.rotatintnullablevrot2? Rotational velocity of the secondary for binarieskm/sphys.veloc.rotatintnullable