J/A+A/612/A96ivo://CDS.VizieR/J/A+A/612/A96doi:10.26093/cds/vizier.36120096CDSFrasca A.Guillout P.Klutsch A.Freire Ferrero R.Marilli E.,Biazzo K.Gandolfi D.Montes D.2018-05-16T07:19:08Z2018-05-04T10:10:04ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starsx-ray-sourcesspectroscopyeffective-temperatureradial-velocityStar formation in the solar neighborhood is mainly traced by young stars in open clusters, associations, and in the field, which can be identified, for example, by their X-ray emission. The determination of stellar parameters for the optical counterparts of X-ray sources is crucial for a full characterization of these stars. This work extends the spectroscopic study of the RasTyc sample, obtained by the cross-correlation of the TYCHO and ROSAT All-Sky Survey catalogs, to stars fainter than V=9.5mag and aims to identify sparse populations of young stars in the solar neighborhood. We acquired 625 high-resolution spectra for 443 presumably young stars with four different instruments in the northern hemisphere. The radial and rotational velocity (vsini) of our targets were measured by means of the cross-correlation technique, which is also helpful to discover single-lined (SB1), double-lined spectroscopic binaries (SB2), and multiple systems. We used the code ROTFIT to perform an MK spectral classification and to determine the atmospheric parameters (Teff, logg, [Fe/H]) and and vsini of the single stars and SB1 systems. For these objects, we used the spectral subtraction of slowly rotating templates to measure the equivalent widths of the H{alpha} and LiI-6708A lines, which enabled us to derive their chromospheric activity level and lithium abundance. We made use of Gaia DR1 parallaxes and proper motions to locate the targets in the HR diagram and to compute the space velocity components of the youngest objects. We find a remarkable percentage (at least 35%) of binaries and multiple systems. On the basis of the lithium abundance, the sample of single stars and SB1 systems appears to be mostly (about 60%) composed of stars younger than the members of the UMa cluster. The remaining sources are in the age range between the UMa and Hyades clusters (about 20%) or older (20%). In total, we identify 42 very young (PMS-like) stars, which lie above or very close to the Pleiades upper envelope of the lithium abundance. A significant percentage (about 12%) of evolved stars (giants and subgiants) is also present in our sample. Some of these stars are also lithium rich (A(Li)>1.4).2018A&A...612A..96Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/612/A96CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/454/301 : Radial velocities of 6 binaries (Frasca+, 2006)J/A+A/490/737 : Radial velocities of 3 RasTyc new triple system (Klutsch+ 2008)J/A+A/504/829 : Spectroscopic survey of youngest field stars (Guillout+, 2009)J/ApJ/818/113 : HST observations of QSOs with medium spectra (Neeleman+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/612/A96https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/612/A96http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/612/A96https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/612/A96https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/612/A96http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/612/A96GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/612/A96/tablea1 (RV and vsini for the single stars and SB1 systems)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/612/A96/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/612/A96/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/612/A96/tablea1?GETtext/xml+votable180.050000true0.171416779.677750.005555555555555556Cone search capability for table J/A+A/612/A96/tablea2 (RV and vsini for the components of SB2 systems)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/612/A96/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/612/A96/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/612/A96/tablea2?GETtext/xml+votable180.050000true3.418833377.03636110.005555555555555556Cone search capability for table J/A+A/612/A96/tablea3 (RV and vsini for the components of SB3 systems)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/612/A96/tablea3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/612/A96/tablea3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/612/A96/tablea3?GETtext/xml+votable180.050000true277.75437525.258750.005555555555555556Cone search capability for table J/A+A/612/A96/tablea4 (Atmospheric parameters, H{alpha} and LiI EWs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/612/A96/tablea4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/612/A96/tablea4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/612/A96/tablea4?GETtext/xml+votable180.050000true0.171416779.677750.0055555555555555566/862 946 999 1005 1149 1182 1234 1314 1330 1358 1362 1429 1466 1471 1594 1604 1627 1647 1662 1665 1674 1691 1714 1769 1771 1782 1786 1819 1872 1895 1965 2031 2167 2171 2236 2252 2293 2322 2347 2374 2396 2423 2427 2476 2484 2500 2571 2574 2640 2686 2721 2724 2755 2773 2811 2863 2867 2879 2881 2923 2938 2959 2966 2974 2984 2998 3013 3056 3078 3092 3097 3183 3210 3249 3254 3280-3281 3292 3301 3308 3329 3493 3507 3688 3792 3832 3838 3875 3881 3888 3892 3905 3990 4009 4011-4013 6360 6541 6657 6664 6689 6709 6733 6762 6774 6839 6889 6907 6966 6998 7010 7078 7097 7110 7139 7739 7779 7854 7884 7917 8216 8272 8433 8475 8496 8583 9036 9232 9254 9318 9335 9411 9422 9446 9662 9790 9870-9871 9932 9962 9964 10016 10026 10096 10167 10171 11277 11345 11348 11371 11485 11606 11681 11687 11758 11765 12131 12240 12275 12292 12340 12463 12474 12480 12567 12573 12631 12634-12635 12654 12662 12694 12762 12770 12792-12793 12795 12851 13020 13106 13110 13112 13114 13122 13175-13176 13187 13202 13208 13234 13243 13247 13261 13263-13264 13266 13287 13290 13303 13369 13405 13414 13457 13460 13462 13490 13511 13538 13603 13609 13684 13694 13714 13766 13769 13811 13813 13825 13868 13877 13881 13885 13892 13897 13963 13966 13986 13992 14008 14010 14014 14041 14066 14069 14092 14104 14112 14127 14129 14198 14263 14311 14328 14364 14393 14453 14506 14562 14593 14596 14604 14620 14679 14750 15041 15107 15132-15133 15154 15189 15194 15258 15305 15363 15368-15369 15371 15373 15475 15486 15488 15494 15509 15544 15604 15609 15755 15819 15840 15857 15871 15896 16004 16008 16012 16134 16207 16247 16304 16334 16345 16348 16862 17210 17256 17329 17355 18601 18607 18686 18693 18695 18731 18745 18753 18755 18758 18797 18832 18836 18838 18840 18859 18870 18877 18884 18888-18889 18929 18933 18967 18993 19022 19030 19053 19065 19067 19105 19164 19205 19219 19226 19256 19286 19371 19376 19393 19409 19413-19414 19417 19432 19442 19446 19448 19454 19626 20005 20108 20112 20129 20131 20455 24411 24517 29547 29810 29980 29993 29999 30130 30196 30317 30319 30410 30422 30460 30511 30662 30668 30956 31037 31073 31094 31120 31151 31155 31211 31219 31226 31356 31358 31541 31546 31550-31551 31599 31631 31649 31666 31708 31740 31747 31778 31873 32020 32126 32141 32233 32255 32361 32411 32415 32426 32454 32492 32545 32589 32612 32651 32717 32735 44912 49019 49062 49081 49096 491203.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/612/A96?format=asciiX-raydefaultJ/A+A/612/A96/tablea1RV and vsini for the single stars and SB1 systemsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRasTycRasTyc Name (HHMM+DDMM)meta.id;meta.maincharNameStar Namemeta.idcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmag? Johnson V magnitude from TYCHO catalogmagphot.mag;em.opt.VfloatnullableB-V? Johnson B-V colour from TYCHO catalogmagphot.color;em.opt.B;em.opt.VfloatnullableHJDReduced Heliocentric Julian day (HJD-2400000)dtime.epoch;pos.heliocentricdoubleHRVHeliocentric Radial Velocitykm/sspect.dopplerVeloc;pos.heliocentricfloate_HRVHeliocentric Radial Velocity errorkm/sstat.errorfloatl_vsiniLimit flag on vsinimeta.code.error;phys.veloc.rotatcharvsiniC? Projected rotational velocity - CCFkm/sphys.veloc.rotatfloatnullablee_vsiniC? Projected rotational velocity errorkm/sstat.errorfloatnullablevsini? Projected rotational velocity - ROTFITkm/sphys.veloc.rotatfloatnullablee_vsini? Projected rotational velocity errorkm/sstat.error;phys.veloc.rotatfloatnullableInstSpectrograph (1)meta.id;instrcharNotesIndividual notes (2)meta.notecharJ/A+A/612/A96/tablea2RV and vsini for the components of SB2 systemsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRasTycRasTyc Name (HHMM+DDMM)meta.id;meta.maincharNameStar Namemeta.idcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagJohnson V magnitude from TYCHO catalogmagphot.mag;em.opt.VfloatHJDReduced Heliocentric Julian day (HJD-2400000)dtime.epoch;pos.heliocentricdoubleHRV1? Heliocentric Radial Velocity of Comp 1km/sspect.dopplerVeloc;pos.heliocentricfloatnullablee_HRV1? Heliocentric Radial Velocity error of Comp 1km/sstat.errorfloatnullableHRV2? Heliocentric Radial Velocity of Comp 2km/sspect.dopplerVeloc;pos.heliocentricfloatnullablee_HRV2? Heliocentric Radial Velocity error of Comp 2km/sstat.errorfloatnullablel_vsini1Limit flag on vsini1meta.code.errorcharvsini1? Projected rotational velocity of Comp 1km/sphys.veloc.rotatfloatnullablee_vsini1? Projected rotational velocity error 1km/sstat.errorfloatnullablel_vsini2Limit flag on vsini2meta.code.errorcharvsini2? Projected rotational velocity of Comp 2km/sphys.veloc.rotatfloatnullablee_vsini2? Projected rotational velocity error 2km/sstat.errorfloatnullableInstSpectrograph (1)meta.id;instrcharNotesIndividual notes (2)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/612/A96/tablea3RV and vsini for the components of SB3 systemsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRasTycRasTyc Name (HHMM+DDMM)meta.id;meta.maincharNameStar Namemeta.idcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainHJDReduced Heliocentric Julian day (HJD-2400000)dtime.epoch;pos.heliocentricdoubleHRV1? Heliocentric Radial Velocity of Comp 1km/sspect.dopplerVeloc;pos.heliocentricfloatnullablee_HRV1? Heliocentric RV error of Comp 1km/sstat.errorfloatnullableHRV2? Heliocentric Radial Velocity of Comp 2km/sspect.dopplerVeloc;pos.heliocentricfloatnullablee_HRV2? Heliocentric RV error of Comp 2km/sstat.errorfloatnullableHRV3? Heliocentric Radial Velocity of Comp 3km/sspect.dopplerVeloc;pos.heliocentricfloatnullablee_HRV3? Heliocentric RV error of Comp 3km/sstat.errorfloatnullablel_vsini1Limit flag on vsini1meta.code.errorcharvsini1? Projected rotational velocity of Comp 1km/sphys.veloc.rotatfloatnullablee_vsini1? Projected rotational velocity error 1km/sstat.errorfloatnullablel_vsini2Limit flag on vsini2meta.code.errorcharvsini2? Projected rotational velocity of Comp 2km/sphys.veloc.rotatfloatnullablee_vsini2? Projected rotational velocity error 2km/sstat.errorfloatnullablel_vsini3Limit flag on vsini3meta.code.errorcharvsini3? Projected rotational velocity of Comp 3km/sphys.veloc.rotatfloatnullablee_vsini3? Projected rotational velocity error 3km/sstat.errorfloatnullableInstSpectrograph (1)meta.id;instrcharNotesIndividual notes (2)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/612/A96/tablea4Atmospheric parameters, H{alpha} and LiI EWsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRasTycRasTyc Name (HHMM+DDMM)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainSpType? Spectral type in MK or HDsrc.spTypecharTeff? Effective temperatureKphys.temperature.effectiveintnullablee_Teff? Effective temperature errorKstat.error;phys.temperature.effectiveintnullablelogg? Logarithm of surface gravitylog(cm.s**-2)phys.gravityfloatnullablee_logg? Error on logarithm of surface gravitylog(cm.s**-2)stat.errorfloatnullable[Fe/H]? Iron abundance relative to the Sunlog(Sun)phys.abund.Fefloatnullablee_[Fe/H]? Error on iron abundance relative to the Sunlog(Sun)stat.error;phys.abund.FefloatnullableEW(Li)? Lithium equivalent width0.1pmspect.line.eqWidthintnullablee_EW(Li)? rms uncertainty on EW(Li)0.1pmstat.errorintnullableEWHa? H{alpha} equivalent width0.1pmspect.line.eqWidth;em.line.Halphaintnullablee_EWHa? H{alpha} equivalent width error0.1pmstat.errorintnullableBinBinary flag (1)meta.codecharInstSpectrograph (2)meta.id;instrcharNotesIndividual notes (3)meta.notechar