J/MNRAS/503/938ivo://CDS.VizieR/J/MNRAS/503/938doi:10.26093/cds/vizier.75030938CDSZerjal M.Rains A.D.Ireland M.J.Zhou G.Kammerer J.Wallace A.,Orenstein B.J.Nordlander T.Abbot H.Chang S.-W.2024-11-06T20:33:32Z2024-03-04T15:09:52ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starsradial-velocityvisible-astronomyIn the Gaia era, the majority of stars in the Solar neighbourhood have parallaxes and proper motions precisely determined while spectroscopic age indicators are still missing for a large fraction of low-mass young stars. In this work, we select 756 overluminous late K and early M young star candidates in the southern sky and observe them over 64 nights with the ANU 2.3-m Telescope at Siding Spring Observatory using the Echelle (R=24000) and Wide Field spectrographs (WiFeS, R=3000-7000). Our selection is kinematically unbiased to minimize the preference against low-mass members of stellar associations that dissipate first and to include potential members of diffuse components. We provide measurements of H{alpha} and calcium H&K emission, as well as of LiI 6708{AA} in absorption. This enables identification of stars as young as 10-30Myr - a typical age range for stellar associations. We report on 346 stars showing detectable lithium absorption, 318 of which are not included in existing catalogues of young stars. We also report 125 additional stars in our sample presenting signs of stellar activity indicating youth but with no detectable lithium. Radial velocities are determined for WiFeS spectra with a precision of 3.2km/s and 1.5km/s for the Echelle sample.2021MNRAS.503..938Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/503/938CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/A+A/551/L8 : Chromospheric activity of field stars (Pace, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/503/938https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/503/938http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/503/938https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/503/938https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/503/938http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/503/938GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/503/938/tablea1 (List of young star candidates with their radial velocities and youth signatures)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/503/938/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/503/938/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/503/938/tablea1?GETtext/xml+votable180.050000true2.9438036-11.66541190.005555555555555556Cone search capability for table J/MNRAS/503/938/tableb1 (List of stars from the Pace (2013A&A...551L...8P, Cat. J/A+A/551/L8) compilation with literature values and used here to calibrate the S-index)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/503/938/tableb1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/503/938/tableb1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/503/938/tableb1?GETtext/xml+votable180.050000true26.0170131-15.937480.0055555555555555565/10748 6/123-124 158 203 220 263 310 331 344 363 368-369 456 496 588 679 786 797 812 848 865 869 1031-1032 1042 1047 1050 1054 1061 1071 1080 1083 1085-1087 1089 1094 1102 1108 1124 1128 1162 1165 1169 1173 1188 2070 2186 4176 4580 8423 8523 12340 13224 14466 16455 16497 16567 16666 16671 16686 16875 17248 17284 17425 17502 17530 18139 18157 18302 18634 18709 19014 19751 19914 19957 20073-20074 20171 20173 20504 20507 20628 20694 20820 21164 21289 21346 21389 21422 21438 21465 21473 21689 21726 22023 22028 22034 22040 22104 22144 22361 22457 22602 22655 22694 22708 22731 22786 22791 22793 22806 22813 22818 22822 22856 22924 22934 22942 23026 23251 23273 23303 23333 23381 23410 23418 23420 23447 23460 23462 23536 23545-23546 23576 23596 23674 23694 23728 23738 23849 23984 23994 24015 24082 24084 24105 24138 24165 24170 24182 24210 24212 24218 24229 24237 24259 24273 24277-24279 24281 24284 24299 24302 24313 24357 24362 24449-24450 24472 24484 24576 24608 24777 24806 25015 25056 27996 28229 28771 28778 28788 28818 28842 28903 28977 28979 29155 29165 29178-29179 29189-29190 29193 29196 29210 29215 29240 29283 29286 29288 29294 29321 29342 29344 29363 29370 29373 29387 29418 29433 29456 29484-29485 29538-29539 29544-29545 29554-29555 29566 29569 29588 29590 29616 29633 29635 29648 29650 29653 29663 29688 29719 29862 29894 29899 30104 30238 30248 30250 30255 30277 30337 30339 30356 30671 30726 30739 30743 30748 30772 30817 30820 30836 30840 30930 30991 31000 31003 31006 31011 31025 31033 31036 31040 31068 31070 31117 31267 31269 31439 31742 31745 31790 31812 31866 31868 31960 31988 32014 32039 32062 32084 32087 32132 32234 32514 33281 33411 33418 33493 33694 33737 33850 33894 33956 33984 34012 34047 34270 34376 34402 34406 34618 34930 34997 35065 35299 35501 35531 35773 35808 35876 36082 36139 36163 36239 36276 36492 36561 36667 36697 36735 36951 36955-36957 37012 37060 37120 37135 37139 37145 37156 37212 37215 37229 37233 37238 37240 37246 37253 37257 37278 37329 37335 37395 37439 37442 37498 37557 37631 37667 37787 37803 37816 37847 37890 37894 37901 37906-37908 37922 37955 37957 37960 37975 38105 38149 38219 38285 38322 38341 38347 38363 38568 38576 38586 38612 38726 38800 38996 39156 39200 39288 39301 39310 39472 39490 39524 39529 39548 39576 39612 39697 39758 39842 39885 39912 39963 40067 40081 40099 40167 40186 40190 40454 40460 40608 40629 40979 40991 41023 41028 41032-41033 41117 41119 41122 41132 41134 41151 41164 41199 41465 41489 41492 41501 41507 41512 41516 41546-41547 41588 41601 41606-41607 41636 41643-41646 41657 41664-41665 41673 41698 41704 41708 41741 41766 41783 41794 41824 41911 41917 41949 41952 41970 41983 42009 42139 42153 42176 42204 42206 42340 42351 42360 42374 42385 42403 42414-42415 42419 42424 42428 42454 42457 42462 42467 42471 42476 42512 42514 42516 42519-42520 42524 42541 42561 42564 42568 42572 42574 42577 42583-42584 42588-42589 42593 42595 42608 42610-42613 42615-42616 42621 42633 42652 42662 42664 42692 42700 42704 42708 42711 42723-42725 42734 42741 42754-42756 42758 42760-42761 42766 42774-42775 42777 42796 42810 42816 42818 42822 42859 42868 42875 42894 42907 42929-42930 42943 42956-42957 42970 42978 42985-42987 42990 43006 43011 43013-43014 43017 43019-43020 43026 43028 43031-43032 43035 43038-43039 43046 43048 43050 43055 43058-43061 43063 43067 43072 43083 43103 43109-43110 43113 43120 43126 43134 43136 43149 43152 43157 43162 43164-43166 43169-43170 43182 43193 43210 43222-43223 43226 43232 43251 43258 43272 43290 43292 43294 43298 43318 43342 43349 43354 43390 43397 43402 43404 43412 43415 43421 43425 43427 43435 43440 43457 43520 43523 43532 43535 43550 43595 43608 43628 43674 43682 43693 43971 44047 44050-44051 44065 44087 44121 44128 44133 44153 44295 44308 44314 44316 44318 44332 44334 44340 44342-44343 44353 44355 44361 44363 44366 44371 44373 44377 44386 44389 44400 44408 44438 44445 44491 44500 44616 44657 44738 44805 44810 45096 45123 45203 45471 45484 45511 45564 45669 45754 46207 46402 46640 46922 46925 46976 47020 47033 47065 47120 47610 47716 47811 47821 47823 47825 47827-47828 47832-47833 47843 47906 47941 47993 48018 48437 48553 48671 48712 48751 48820 48869 491091.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/503/938?format=asciiOpticaldefaultJ/MNRAS/503/938/tablea1List of young star candidates with their radial velocities and youth signaturesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2? Gaia DR2 source_idmeta.id;meta.mainnullableGmag? Gaia G magnitudemagphot.mag;em.optfloatnullableBP-W1? Gaia BP minus Wise W1 colour indexmagphot.color;em.opt;em.IRfloatnullableBP-RP? Gaia BP minus RP colour indexmagphot.color;em.opt.B;em.opt.RfloatnullableRUWE? Gaia RUWEstat.errorfloatnullableObs.dateObservation datetime.epoch;obsnullableInstInstrumentmeta.id;instrcharS/N(B)? Signal-to-noise ratio in B bandstat.snrintnullableS/N(R)? ignal-to-noise ratio in R bandstat.snrintnullableRV? Radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RV? Radial velocity errorkm/sstat.errorfloatnullablelogR'HK? R'_HK_ chromospheric activity indexphot.flux;arith.ratiofloatnullableEW(Ha)? H{alpha} equivalent width0.1nmspect.line.eqWidthfloatnullableEW(Li)? Li equivalent width0.1nmspect.line.eqWidthfloatnullableBinary[0/1] Binary ? (1=true)meta.codeintBalmer[0/1] Balmer ? (1=true)meta.codeint_RAPositions from Gaia DR2 and 2MASS name (right ascension part)degpos.eq.ra;meta.main_DEPositions from Gaia DR2 and 2MASS name (declination part)degpos.eq.dec;meta.main2MASS2MASS name (HHMMSSss+DDMMSSs)meta.idcharJ/MNRAS/503/938/tableb1List of stars from the Pace (2013A&A...551L...8P, Cat. J/A+A/551/L8) compilation with literature values and used here to calibrate the S-indexSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDHD numbermeta.id;meta.mainintGaiaDR2Gaia DR2 numbermeta.idObs.dateObservation datetime.epoch;obsnullableSrawS-index measured with the WiFeS instrumentspect.indexfloatSminLower value of S-indexspect.indexfloatSmaxHighest value of S-indexspect.indexfloatlogRminConversion of Smin into logR'_HK_spect.indexfloatlogRmaxConversion of Smax into logR'_HK_spect.indexfloatBP-RPBP-RP colour indexmagphot.color;em.opt.B;em.opt.RfloatRefsReferences (1)meta.ref;pos.framechar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main