J/A+A/660/A38ivo://CDS.VizieR/J/A+A/660/A38doi:10.26093/cds/vizier.36600038CDSWang Y.-F.Luo A-L.Chen W.-P.Jones H.R.A.Du B.Li Y.-B.Zhang S.,Bai Z.-R.Kong X.Guo Y.-X.2024-06-05T16:42:27Z2022-04-05T13:32:50ZCDS support team

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

cds-question@unistra.frsurveysdwarf-starslate-type-starsspectroscopyvisible-astronomyWe identify 734 ultracool dwarfs having spectral type M6 or later including one L0, of which, 625 are having spectral observation for the first time with LAMOST. All these ultracool dwarfs are within 360 pc, with the Gaia G magnitude brighter than ~19.2mag. Studying the spectra and checking their stellar parameters (Teff, logg and [M/H]) derived with the LAMOST pipeline, we found their cool red nature and their metallicity consistent with being Galaxy thin disk objects. Furthermore, 77 of them show lithium absorption line at 6708{AA} indicating their young ages and substellar nature. Kinematics obtained through LAMOST radial velocities combining with the proper motion and parallax from Gaia EDR3, also suggest the majority of our targets are thin disk objects. Kinematic ages are estimated through the relationship between the velocity dispersion and the average age for a certain population. Moreover, 35 binaries are identified, among which 6 are reported as binaries for the first time.2022A&A...660A..38Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/660/A38CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/350 : Gaia EDR3 (Gaia Collaboration, 2020)http://dr7.lamost.org : LAMOST DR7 Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/660/A38https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/660/A38http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/660/A38https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/660/A38https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/660/A38http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/660/A38GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/660/A38/table1 (The ultracool dwarfs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/660/A38/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/660/A38/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/660/A38/table1?GETtext/xml+votable180.050000true0.290677.303350.005555555555555556Cone search capability for table J/A+A/660/A38/table2 (Radial velocity and atmosphere parameters in LDR7)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/660/A38/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/660/A38/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/660/A38/table2?GETtext/xml+votable180.050000true0.290677.303350.005555555555555556Cone search capability for table J/A+A/660/A38/table3 (Kinematic parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/660/A38/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/660/A38/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/660/A38/table3?GETtext/xml+votable180.050000true0.290677.303350.0055555555555555566/30 51 72 138-139 143 183 197 314 317 319 325 337 340 347 366 374 454 457 461-462 467 473 476 483 595 599 615 630 650 682 684-685 709 721 758 822-823 825-826 829 833 848 852 854 864-866 881 896 918 939 1020 1036 1047 1054 1056 1067 1075 1090 1141 1213 1223 1280-1281 1308 1357 1478 1539 1583 1673 1684 1884 1938 1970-1971 2058 2074 2079 2097 2099 2102-2103 2109-2110 2122 2145-2147 2150-2152 2155 2158 2162-2163 2168 2170 2175 2185 2197 2203 2207 2218 2227 2231 2236 2241 2244 2247 2250 2252 2254 2273-2274 2276 2284 2287 2368 2433 2456 2536 2549 2577 2580 2586 2588 2590-2591 2607 2611-2612 2618 2626-2627 2634-2635 2639-2640 2642 2646 2650 2653 2655-2656 2658-2660 2663-2664 2668 2677 2679 2681 2688-2689 2701 2705-2708 2710 2718 2752 2796 2826-2827 2830 2850 2861 3009 3082 3112 3137 3174 3262 3289 3291 4121 4156 4191 4200 4245 4249 4267 4285 4293 4332 4470 4496 4537 4560 4569-4570 4586 4597 4605 4607-4608 4617 4631 4633 4662 4685 4691 4693-4694 4739 4741 4755 4769-4770 4773 4849 4862 4909 4936 4945 4958 4964 4978 5005 5088 5169 5174 5185 5214-5215 5222 5225 5262 5285 5314 5373 5420 5428 5439 5507 5511 5538 5540 5546 5604 5623 5633 5639 5681 5699 5701 5710-5712 5717 5724 5727 5757-5758 5771 5779 5792 5796 5825 5894 5902 5909 5911 5916 5966 5970 5982 5996 6000 6009-6010 6047 6064 6149-6150 6168 6193 6206 6212 6214 6217 6221 6255 6267 6277-6278 6280 6283 6285 6294 6296-6297 6302 6307 6346 6366 6373 6392 6488 6497 6511 6539 6544 6578 6580 6588 6612 6619 6654 6661 6669 6719 6733 6755 6800 6823 6848 6880 6926 6978 7009 7117 7168 7175 7183 7205 7210 7219 7237 7262 7306 7313 7681 7927 8075 8331 8379 8412 8417 8527 8681 8702 8722 8735 8779 8812 8852 8868 8875 8878 8920 8924 8958 8968 9003 9009 9014 9018 9021 9034 9064 9068 9083 9086 9089 9096 9105 9124 9130 9136 9138 9150 9289 9317 9341 9471 9478 9783 9844 9868 10124 10153 10177 10241 10265 10296 10299 10337 10345 10360-10361 10376-10377 10383 10389 10416 10418 10420 10424 10437 10457 10500 10511 10523 10560 10625 10636 10644 10667 10695 10749 10770 10774 10790 10816 10900 10977 11070 11088 11118 11180-11181 11183 11185 11192 11200 11202 11208 11227 11373 12459 13366 13582 13664 13675 13677 14772 17645 17647 17658-17659 17661 17663 17729 17745 17748-17749 17774-17775 17786 17829 17840 17854 17858 17861 17867 17872-17873 17879 17915 18001 18004 18117 18135 18137 18159 18166 18188 18196 18202 18221 18233 18264 18315-18316 18361 18378 18840 18852 19067 19100 19103 19196 19202 19228 19280 19294 19320 19337 19344 19363 19372 19410 19510 19525 19537 19636 19639 19701-19702 19707 19959 19965 19972 19980 20022 20104 20131-20133 20179 20345 20439 20443 20470 21500 21806 21964 21981 21987 22179 22239 22321 22330 22398 22410 22475 22509 22739 22888 22899 22950 23007 23183 23204 23212 23273 23275 23279 23288 23358 23392 23395 23476 23494 23496 23508-23509 23515 23519 23530 23545 23554 23607 23689 23702 23704 23741 23743 23801 23827 23859-23860 23883 23916 23929 23946 23978 24016 24055 24059 24061 24069 24091 24111 24172 24202 24210 24236 24268 24282 24288 24310 24313 24319 24333 24363 24365 24370 24379 24389 24392 24397 24406 24416 24420 24435 24459 24484 24486-24487 25558 25579 25599 26034 26045 26107 26281 26283 26295 26301 26371 26404 26408 26436 26445 26460 26534 26545 26815 26905 26991 27068 27077 27110 27115 27214 27296 27302 27431 27433 27441 27565 27635 27642 27675 27686 27713 27723 27727 27733 27840 27937 27975 27985 27997 28015 28025 28047 28105 28123 28137 28140 28168 28178 28307 28313 28329 28343 28356 28358 28412 28415 28421 28491 28493 28502 28528 28559 28563 28568 28570 28582 28595 28612 28614 28624 28633 28656 31300 31303 31406 31427 31702 32507 32753 36851 36854 36860 45050 450551.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/660/A38?format=asciiOpticaldefaultJ/A+A/660/A38/table1The ultracool dwarfsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/734] Running numbermeta.id;meta.mainintobsidLAMOST obsidmeta.id;obscharRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainSpType1Spectral type from LAMOST DR7src.spTypecharGaiaEDR3Gaia EDR3 source_idmeta.idcharplx? parallax from Gaia EDR3maspos.parallax.trigdoublenullableRUWE? RUWE from Gaia EDR3stat.errordoublenullablee_plx? uncertainty of parallax from Gaia EDR3masstat.error;pos.parallaxdoublenullablepmRA? Proper motion in RA direction, pmRA*cosDE, from Gaia EDR3mas/yrpos.pm;pos.eq.radoublenullablee_pmRA? Uncertainty of proper motion in RA direction from Gaia EDR3mas/yrstat.error;pos.pm;pos.eq.radoublenullablepmDE? Proper motion in Dec direction from Gaia EDR3mas/yrpos.pm;pos.eq.decdoublenullablee_pmDE? Uncertainty of proper motion in Dec direction from Gaia EDR3mas/yrstat.error;pos.pm;pos.eq.decdoublenullableGmagG band magnitude from Gaia EDR3magphot.mag;em.optfloatBPmag? BP band magnitude from Gaia EDR3magphot.mag;em.opt.BdoublenullableRPmag? RP band magnitude from Gaia EDR3magphot.mag;em.opt.RdoublenullableSpType2Spectral type from the literature (SIMBAD)src.spTypecharJ/A+A/660/A38/table2Radial velocity and atmosphere parameters in LDR7SimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/734] Running numbermeta.id;meta.mainintRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainRV? Radial velocity from LAMOST DR7km/sphys.veloc;pos.heliocentricdoublenullableTeff? Effective temperature from LAMOST DR7Kphys.temperature.effectiveintnullablee_Teff? Uncertainty of effective temperature from LAMOST DR7Kstat.error;phys.temperature.effectiveintnullablelogg? Surface gravity from LAMOST DR7log(cm.s**-2)phys.gravitydoublenullablee_logg? Uncertainty of surface gravity from LMAOST DR7log(cm.s**-2)stat.errordoublenullableMH? Metallicity from LAMOST DR7phys.abund.Zdoublenullablee_MH? Uncertainty of metallicity from LAMOST DR7stat.errordoublenullableLi[HMLN] Flag of the lithium strength (1)meta.codecharSNRiSignal to noise ratio in SDSS i band from LAMOST DR7stat.snrintSNRzSignal to noise ratio in SDSS z band from LAMOST DR7stat.snrintJ/A+A/660/A38/table3Kinematic parameterse_VLower uncertainty of Galactic V velocitykm/sstat.error;pos.cartesian.yfloatWGalactic W velocitykm/sphys.veloc;pos.cartesian.zfloatE_WUpper uncertainty of Galactic W velocitykm/sstat.error;stat.maxfloate_WLower uncertainty of Galactic W velocitykm/sstat.error;pos.cartesian.zfloatzgalGalactic heightpcpos.cartesian.z;pos.galacticfloatE_zgalUpper uncertainty of Galactic heightpcstat.error;stat.maxfloate_zgalLower uncertainty of Galactic heightpcstat.error;pos.distance;pos.cartesian.zfloatrgalDistance to the Galactic center on the Galactic planepcpos.distancefloatE_rgalUpper uncertainty of distance to the Galactic center on the Galactic planepcstat.error;stat.maxfloate_rgalLower uncertainty of distance to the Galactic center on the Galactic planepcstat.error;pos.distance;pos.galactocentricfloatTDD? probability ratio of thick disk over diskstat.fit.goodnessdoublenullableTDH? probability ratio of thick disk over halostat.fit.goodnessintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/733] Running numbermeta.id;meta.mainintRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainUGalactic U velocitykm/sphys.veloc;pos.cartesian.xfloatE_UUpper uncertainty of Galactic U velocitykm/sstat.error;stat.maxfloate_ULower uncertainty of Galactic U velocitykm/sstat.error;pos.cartesian.xfloatVGalactic V velocitykm/sphys.veloc;pos.cartesian.yfloatE_VUpper uncertainty of Galactic V velocitykm/sstat.error;stat.maxfloat