[Fe/H] dependence of the wide-binary fraction J/MNRAS/501/4329 ivo://CDS.VizieR/J/MNRAS/501/4329 doi:10.26093/cds/vizier/bg-fn-479 CDS Hwang H.-C. Ting Y.-S. Schlaufman K.C. Zakamska N.L. Wyse R.F.G. 2026-08-03T07:30:56Z 2023-11-15T08:56:01Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr multiple-stars milky-way-galaxy proper-motions visible-astronomy trigonometric-parallax metallicity effective-temperature radial-velocity The metallicity dependence of the wide-binary fraction (WBF) IN stellar populations plays a critical role in resolving the open question of wide-binary formation. In this paper, we investigate the metallicity ([Fe/H]) and age dependence of the WBF (binary separations between 10^3^ and 10^4^au) for field F and G dwarfs within 500pc by combining their metallicity and radial velocity measurements from LAMOST Data Release 5 (DR5) with the astrometric information from Gaia DR2. We show that the WBF strongly depends on the metallicity: as metallicity increases, the WBF first increases, peaks at [Fe/H]~0, and then decreases at the high-metallicity end. The WBF at [Fe/H]=0 is about two times larger than that at [Fe/H]=-1 and +0.5. This metallicity dependence is dominated by the thin-disc stars. Using stellar kinematics as a proxy of stellar age, we show that younger stars have a higher WBF at fixed metallicity close to solar. We propose that multiple formation channels are responsible for the metallicity and age dependence. In particular, the positive metallicity correlation at [Fe/H]<0 and the age dependence may be due to the denser formation environments and higher mass clusters at earlier times. The negative metallicity correlation at [Fe/H]>0 can be inherited from the similar metallicity dependence of close binaries, and radial migration may play a role in enhancing the WBF around the solar metallicity. 2021MNRAS.501.4329H https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/501/4329 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to I/345 : Gaia DR2 (Gaia Collaboration, 2018) V/164 : LAMOST DR5 catalogs (Luo+, 2019) J/A+A/525/A71 : Atmospheric parameters for 1273 stars (Wu+, 2011) J/other/RAA/11.924 : Atmospheric parameters for 771 stars (Wu+, 2011) J/ApJS/245/34 : Abundances for 6 million stars from LAMOST DR5 https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/501/4329 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/501/4329 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/501/4329 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/501/4329 https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/501/4329 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/501/4329 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/MNRAS/501/4329/wblasp (LASP wide-binary catalogue) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/501/4329/wblasp? https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/501/4329/wblasp? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/501/4329/wblasp? GET text/xml+votable 180.0 50000 true 44.4072819 1.0945578 0.005555555555555556 Cone search capability for table J/MNRAS/501/4329/wbpayne (DD-Payne wide-binary catalogue) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/501/4329/wbpayne? https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/501/4329/wbpayne? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/501/4329/wbpayne? 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11423 11426 11436 11439-11440 11445 11451 11456 11462 11465 11469 11488 11521-11523 11525-11529 11532 11553 11777 11781 11788-11789 11809-11810 12288 12300 12304 12312 12355 12367 12369 12373-12375 12377 12401 12495 12502 12504 12508 12531 12548 12574 12577 12579 12594 12609 12616 12635 12648 12650 12664 12666-12667 12675 12677 12686 12688 12691 12704 12710 12722 12728-12729 12731-12733 12738 12757-12758 12762 12764 12767 12772 12779 12791 12794 12950 12981 13035 13039 13049 13113 13115 13117 13123 13140 13144-13145 13147 13162 13165 13200-13201 13208 13260 13263 13281 13283 13294 13296 13299 13304 13318 13330 13335 13366 13369 13371 13373 13380 13387 13392 13398 13402-13403 13405 13408 13412 13415-13416 13421-13423 13441 13459 13461 13463 13471-13472 13476 13480 13482-13483 13504-13506 13511 13516-13517 13519-13520 13522-13524 13534 13537 13545 13549 13552 13571 13575-13577 13580-13582 13586 13588-13589 13593-13597 13599-13600 13602 13604 13608 13610 13614 13616 13620 13622-13624 13626-13628 13632 13640 13643 13648-13649 13654 13656 13665-13667 13672-13674 13685 13687 13693 13702 13705-13706 13712 13716-13718 13723 13726 13750-13751 13759-13760 13770 13774 13783 13785 13788-13789 13794-13795 13797-13798 13802 13804 13824 13839 13849-13850 13852 13854 13860 13862-13863 13873 13876 13878 13881-13882 13885 13890 13922 13924 13926 13928 13952-13953 13955 13965 13969 13971 13975-13976 13978 13980 13982-13983 13989 14006 14132 14140 14145 14147-14148 14152 14170 14174 14188 14194 14230 14236-14237 14275-14276 14278 14282 14366-14367 14391 14410 14419 14422 14428-14429 14434-14435 14440 14494 14496 14513 14521 14524 14526 14574 14577 14579 14583 14588-14590 14594 14600-14602 14612 14615 14620 14658 14667 14671 14682-14684 14688-14689 14691 14697 14701 14703-14705 14707 14710 14713 14715 14731 14733 14735 14738 14744 14746 14751 14753 14757-14758 14762-14763 14769 14771-14773 14798 14804-14805 14807 14810 14813 14821 14825-14826 14832 14834 14836-14837 14856 14860-14861 14866 14902 14909-14911 14915 14917 14919-14920 14922-14923 14932-14933 14935-14938 14945-14946 14951 14953-14954 14956 14959-14961 14963 14973-14974 14982 14990 14994-14997 15002 15004 15021-15023 15030 15033 15037-15039 15047 15055-15056 15061 15068 15074 15079 15083-15084 15090 15096 15102 15105-15107 15109-15111 15133-15138 15140-15141 15143 15149 15152-15153 15155 15158-15161 15169-15172 15178-15179 15190 15197 15220-15221 15232 15265 15267 15269 15274 15276 15278 15280-15281 15403 15879-15880 15883-15884 17609-17610 17614-17615 17636 17647 17651 17657-17658 17662 17667 17724 17744 17749-17750 17757 17761 17769 17772 17781-17785 17787 17790-17791 17818 17822 17840 17853 17858-17859 17863-17864 17866 17872-17874 17876 17879-17880 17884 17889 17914 18012 18015 18023 18033-18035 18038 18042-18043 18046 18079 18096 18098 18102 18105 18110 18120 18132-18133 18136 18144 18187 18190 18197 18209 18211 18214-18215 18226 18229-18231 18233-18235 18239 18244-18246 18251 18258 18265 18273-18274 18279 18281-18282 18284 18294 18298 18304 18308 18311 18313 18316-18317 18323 18325-18327 18330 18332 18336 18357 18363 18369 18371 18375 18380-18381 18383-18384 18386 18392 18400-18402 18408-18409 18411 18414 18420 18423 18426 18430-18431 18647 18675 18679-18680 18767 18782 18795 18797-18800 18802 18806 18808-18809 18811 18827 18838-18839 18841 18844-18845 18847 18852-18853 18857 18860 18871 18882 18887-18889 18891-18894 18896 18907-18908 18931 18937 19000 19078 19089 19118 19141-19142 19149 19160 19167 19183 19185 19188 19194 19225 19230-19231 19297 19316 19318-19319 19322 19360 19363 19365 19368 19370 19375 19387 19458 19462 19465 19467 19475 19479 19483 19503 19507 19509 19511-19512 19516-19517 19528 19552 19554 19560-19561 19585-19587 19590 19601-19602 19604 19608 19626 19658-19659 19700 19708 19779 19782 19787 19790 19793 19796 19798-19799 19805 19809 19811-19812 19819-19821 19823-19824 19826 19832 19855 19857 19866 19872 19877-19878 19881-19882 19890 19895-19897 19899-19901 19903-19904 19907-19909 19911 19918-19919 19922 19930-19931 19936-19938 19941-19945 19947 19953 19958-19959 19962-19963 19968-19969 19979-19980 19996 19998 20002 20005 20008 20011-20012 20019-20022 20025 20043 20046 20052 20075 20078 20094 20097 20116 20125 20145 20150 20153 20155 20163 20166-20167 20176 20180-20181 20183 20185-20187 20195 20200-20202 20209 20211 20214 20237 20239 20241 20243-20244 20246-20247 20249-20250 20252 20262-20263 20266-20267 20271 20274 20276-20278 20280-20281 20283-20284 20286 20292-20293 20296 20299 20301-20302 20305 20307 20311 20319 20321 20323-20324 20329 20331 20333-20335 20343-20345 20348 20351 20355 20359-20360 20367-20369 20372-20373 20375-20376 20380 20385 20387-20390 20395 20397 20409 20413 20415 20417-20418 20428 20431 20434-20435 20442 20444-20445 20449 20451 20453 20456 20459 20461 20464 20466-20469 20471 20473-20474 20476 20478-20479 21356 21358 21374-21375 21423 21434 21443 21445 21447 21454-21458 21460 21462 21470 21472 21474 21478-21479 21484-21485 21487 21489 21496-21498 21500 21597 21619 21621 21628-21630 21713 21725 21750-21751 21756 21759 21761 21767-21769 21774-21775 21780-21781 21784 21786 21788 21790-21792 21798 21800-21801 21803 21806-21807 21813-21814 21820 21822 21824-21825 21832 21834-21835 21837 21839-21841 21844 21846 21850-21851 21860-21861 21867-21870 21874 21877 21890-21891 21898 21902 21904 21906 21911-21913 21915 21919 21921 21929 21931 21940 21945 21947 21949-21950 21953-21955 21958-21960 21963-21964 21966-21967 21969 21971 21976-21978 21980 21982 21984 21987-21988 21990-21991 21993-21995 21997 22000 22002 22004 22006 22008-22009 22013-22015 22096 22100-22102 22105 22113 22117 22124 22126 22129 22137 22139 22142 22149 22152 22162 22165 22167 22170-22171 22187 22189-22190 22192-22193 22197-22199 22201-22202 22205 22207 22210 22212 22220-22221 22224 22232-22233 22240 22243-22245 22248-22249 22251-22252 22255 22257 22264 22270 22272 22283 22285 22288 22290 22296 22298 22309 22323-22324 22329 22333 22336 22339-22342 22348 22351-22353 22356-22358 22361 22365 22367 22371 22379 22381 22384-22385 22387 22391 22393-22396 22398 22406 22408 22412 22419 22423-22425 22428-22429 22431-22432 22434 22441-22442 22445 22447-22448 22455 22457 22459-22461 22463 22468 22471-22473 22475 22481 22483-22485 22488 22491 22498 22504-22505 22508-22509 22511 22513 22516 22524 22527 22687 22711 22728 22732 22734 22747 22753-22756 22758 22770-22771 22773 22776 22782-22783 22791 22797 22800-22802 22804 22806-22807 22809 22811-22812 22833 22835-22836 22845 22849-22850 22852 22855-22856 22858 22860 22872-22873 22878 22880 22882 22888 22895 22899 22902 22904 22908 22912 22915 22918 22921-22922 22938 22946 22951-22952 22958 22960 22967 22970-22972 22983 22992 22994-22995 22998-22999 23001 23004 23007 23028 23030 23071 23079 23087-23088 23090-23091 23095 23102 23109-23110 23123-23124 23126 23130 23134 23137 23153-23158 23161 23196 23199 23209 23212-23214 23225 23231 23234 23237 23240 23243-23244 23254 23260 23262 23265 23268 23271-23272 23274 23276 23280 23282-23286 23291-23294 23298 23304 23308-23309 23329-23330 23333-23334 23336 23338 23355-23356 23358-23359 23370 23375 23384-23386 23392 23395 23397 23400 23402 23408 23410-23411 23414-23415 23421 23435 23438 23442-23444 23447 23449 23456 23460-23461 23464 23468-23469 23472 23475 23480-23481 23485 23487 23518 23525 23527 23530-23533 23540 23542 23546-23548 23555 23557 23559-23560 23563 23565 23567 23569 23571-23573 23584 23586 23592 23594 23608 23659 23663 23675 23686 23689 23691-23694 23701 23705 23707 23711 23713 23718 23722-23723 23726-23728 23730 23736 23742 23745 23747 23749 23751-23753 23755 23757 23760-23762 23765-23767 23769-23770 23773 23775-23776 23779-23780 23787 23794-23795 23798-23799 23801 23807 23811 23816-23817 23827-23829 23832-23833 23835 23844 23856 23862-23866 23868 23871 23875-23876 23881 23883 23886-23887 23894-23895 23897-23900 23902 23905 23907 23909 23914-23915 23917-23918 23924-23926 23929-23933 23937 23942-23943 23945 23950 23952 23954 23957 23964-23966 23970-23971 23975 23978-23979 23981-23984 23989 23991 23996 23998-23999 24001 24003-24004 24006-24008 24010 24012 24015 24017-24020 24022-24024 24026 24029-24030 24034 24040-24042 24044 24047-24048 24051 24056 24058 24067-24069 24077 24084 24088 24092 24094 24112-24114 24117 24121 24128 24130 24133 24135 24138 24140 24142 24148-24149 24152-24154 24156-24158 24161-24163 24169 24177 24180-24181 24183 24185 24187-24188 24190-24192 24217 24224 24227 24232 24237-24238 24244 24247-24248 24251 24254-24255 24257 24272 24288 24290-24291 24296 24298 24323 24325 24332-24333 24335 24337 24339 24348 24352 24354-24355 24357-24358 24361-24362 24365 24369 24378 24381-24383 24385-24386 24388-24390 24393 24396 24401 24416 24424 24444 24453 24461-24463 24466-24467 24470-24471 24478 24480 24487 24492 24494 24497 24499 24504 24511 24513-24514 24519 24524 24528 24533-24536 24539-24540 24547 24551 24554 24556 24559-24560 24562-24564 24568-24569 24571 25447 25456 25459 25467 25470-25471 25540 25556-25557 25562-25563 25565 25571 25593-25597 25599 25715 25720 25774 25787 25796 25798 25800-25801 25805 25810 25823-25824 25829 25831-25832 25837 25846 25850 25854 25882 25892-25893 25906 25912 25917-25919 25921 25923 25927 25935 25939 25951 25955 25958 25966-25967 25971-25972 25986 25990 25996-25997 26006 26015 26021 26027 26031 26041 26047 26050 26053 26057 26064-26065 26067 26072 26082 26084 26095 26101-26102 26108 26117 26122 26131 26139-26141 26144 26176 26179 26182 26184 26186 26188 26194 26198 26202-26203 26207 26211-26212 26220 26232 26235 26239 26242 26246 26249-26253 26257 26260 26266 26271 26277 26295 26302 26313 26319 26330 26336 26344 26364 26368 26370 26372 26376-26377 26379 26388 26397-26400 26402-26403 26406 26413-26414 26418 26432 26434 26437-26438 26445 26456-26458 26464 26473 26476 26481-26482 26485 26490-26491 26495 26497 26512 26515 26522 26524-26525 26531 26533 26536 26546 26549 26552 26558 26567 26570 26572 26579 26583 26586-26587 26589 26591 26596 26599 26602 26607-26608 26614-26615 26621 26841 26844 26847 26871 26883 26902 26904 26906 26926-26927 26930 26932 26934-26935 26947 26950 26954 26971 26974 26983 26986 26990-26991 26997-26999 27001 27003 27005 27020-27022 27024-27025 27029 27031 27037 27062 27076 27079 27081 27086-27087 27091 27098-27099 27102-27103 27105 27116-27118 27121-27123 27135 27193-27194 27196 27223 27277 27284 27291 27297 27302 27307 27338 27410 27414 27423 27429 27431 27448 27450 27455-27456 27461 27474 27479 27481 27504-27505 27507-27508 27510 27514 27518 27542 27584 27605 27633 27636-27637 27658-27660 27662 27674 27691-27693 27706 27708 27712-27713 27715 27724 27729 27731 27733 27735 27737 27745-27746 27753 27757 27763 27765 27769-27771 27774 27777 27780 27782 27787 27791 27793-27795 27800-27801 27810-27811 27822 27841 27845-27846 27851 27854-27855 27858 27865 27870 27874 27881 27893 27900 27914 27918 27923 27934 27936 27948 27951-27952 27957 27964 27984-27985 27991 28000 28003 28013 28018-28019 28021 28023 28038 28047 28052 28059-28060 28065 28082 28085 28094 28106 28116-28117 28120 28122 28124 28129 28137-28138 28144 28147-28148 28151 28157 28160 28163 28166 28170-28171 28176 28183 28187 28191 28193-28194 28196-28198 28201 28203-28204 28207 28216 28221 28226 28232 28234 28261 28265 28267 28314 28318 28329 28338 28341 28345 28368 28376 28411 28437-28438 28464 28471 28475 28478 28481 28484 28486 28488 28490 28494 28501 28508 28511 28513 28515 28517-28518 28521-28522 28524 28526-28527 28529-28532 28542 28559 28565 28572 28582 28589 28593 28596 28598 28607-28609 28611 28629-28630 28635 28637 28644 28651 28653 28657-28658 28663 28666-28668 28671 29659 29663 29674-29675 29678 29685 29687 29935 29946 30250 30290 30293 30315 30338 30357 30369 30371 30376 30383-30384 30386 30388 30395 30397-30398 30402 30407-30408 30441-30443 30467 30508 30678 30929 30932 30970 31018-31019 31038 31045 31050 31057 31059 31061-31062 31064 31070 31076-31077 31086 31088-31089 31092 31096 31100-31101 31104 31112 31124-31125 31129 31131-31132 31139 31144 31146-31147 31159 31162 31166 31170 31176 31178 31180 31184 31193 31201-31203 31205 31210 31218 31225-31227 31230 31292 31294 31297 31302-31303 31305 31321 31325 31334 31336 31344 31366-31367 31374 31378 31382-31383 31385-31387 31398 31406-31407 31416 31421 31428-31429 31432-31433 31450 31457 31459 31466 31469-31470 31472 31478 31485 31489 31495 31497-31498 31500 31505 31507 31509-31510 31518-31519 31531 31536 31538 31540 31549 31558 31561-31562 31568 31572 31574-31576 31579-31581 31586 31589 31594-31595 31600 31604-31605 31607 31618-31619 31623 31628-31629 31637 31639 31651-31652 31655 31658 31673 31681 31690 31697 31699 31702 31707 31709-31710 31715-31717 31719-31720 31730 31733-31734 31737 31740 31746-31747 31754 31756 31761 31769-31771 31775-31776 31783 31791-31792 31795-31796 31799-31800 31803 31806 31809 31812 31826 31843-31844 31846 31851 31870 31872 31875 31878 31886 31888-31889 31891 31896-31897 31906 31909 31914 31921 31926 31933 31940 31943 31949 31953-31954 31956-31957 31962 31964 31966 31969-31972 31979-31981 31984 31986 31988 31990-31991 31994 32035 32042 32061 32098 32105 32108 32110 32163-32164 32170 32174 32187 32192 32260 32266 32273 32275 32277 32279 32288-32289 32292 32295 32297 32301 32304-32305 32312 32321 32323 32329-32331 32334-32338 32340 32342 32346 32348 32351 32357 32361 32368-32370 32372-32374 32379 32384 32387-32389 32392 32401 32405 32412-32413 32423-32424 32431 32437 32441 32449 32452 32463 32467 32471-32472 32475-32476 32478 32484 32493 32496 32498-32499 32502 32505 32507 32513 32518 32520 32522 32524 32529 32531 32545 32547-32548 32550-32552 32555-32556 32558 32563 32566 32570 32572 32578 32602 32644-32646 32650-32653 32655 32661 32664-32666 32669 32672 32677-32678 32692-32693 32702 32704 32715 32742 32747 32749 32767 36716 36718 36730-36731 36734 36807 36809 36812 36815 36825 36847 36853 36856 36861 40885 40891 40893-40894 40911 40922-40923 40931 40935 40941-40942 40945 40952-40953 40958 45019 45033 45035 45044-45045 45049 45052-45053 45055 49006 49023 1.9867573869263685e-19 3.916500758235022e-19 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/501/4329?format=ascii Optical default J/MNRAS/501/4329/wblasp LASP wide-binary catalogue _RA.icrs Right ascension (ICRS) at Epoch=J2000, proper motions taken into account deg pos.eq.ra indexed _DE.icrs Declination (ICRS) at Epoch=J2000, proper motions taken into account deg pos.eq.dec indexed recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int GaiaDR2 Gaia DR2 source identifier of the primary LAMOST star meta.id;meta.main RA_ICRS Right ascension (ICRS) at Ep=2015.5 of the primary LAMOST star deg pos.eq.ra;meta.main DE_ICRS Declination (ICRS) at Ep=2015.5 of the primary LAMOST star deg pos.eq.dec;meta.main plx Parallax of the primary LAMOST star mas pos.parallax.trig float e_plx Error on plx mas stat.error;pos.parallax float pmRA Proper motion in right ascension of the primary LAMOST star mas/yr pos.pm;pos.eq.ra double e_pmRA Error on pmRA mas/yr stat.error;pos.pm;pos.eq.ra float pmDE Proper motion in declination of the primary LAMOST star mas/yr pos.pm;pos.eq.dec double e_pmDE Error on pmDE mas/yr stat.error;pos.pm;pos.eq.dec float Gmag Gaia DR2 G-band magnitude of the primary LAMOST star mag phot.mag;em.opt double LAMOST LAMOST designation from the LASP catalogue meta.id char [Fe/H] Iron abundance of the LAMOST star measured by LASP phys.abund.Fe float Teff Effective temperature of the LAMOST star measured by LASP K phys.temperature.effective float logg Surface gravity of the LAMOST star measured by LASP log(cm.s**-2) phot.sb float vtot Total velocity with respect to the local standard of rest km/s phys.veloc;pos.lsr double zmax Maximum Galactic height of the Galactic orbit kpc pos.cartesian.z;pos.galactic double GaiaDR22 Gaia DR2 source identifier of the companion meta.id.assoc RA2deg Right ascension (ICRS) at Ep=2015.5 of the companion deg pos.eq.ra DE2deg Declination (ICRS) at Ep=2015.5 of the companion deg pos.eq.dec plx2 Parallax of the companion mas pos.parallax.trig float e_plx2 Error on plx2 mas stat.error float pmRA2 Proper motion in right ascension of the companion mas/yr pos.pm;pos.eq.ra double e_pmRA2 Error on pmRA2 mas/yr stat.error;pos.pm;pos.eq.ra float pmDE2 Proper motion in declination of the companion mas/yr pos.pm;pos.eq.dec double e_pmDE2 Error on pmDE2 mas/yr stat.error;pos.pm;pos.eq.dec float Gmag2 Gaia DR2 G-band magnitude of the companion mag phot.mag;em.opt double Sep Physical separation of the wide binary AU pos.angDistance float RV Relative velocity of the wide binary projected on the sky km/s phys.veloc;pos.heliocentric double
J/MNRAS/501/4329/wbpayne DD-Payne wide-binary catalogue Teff Effective temperature of the LAMOST star measured by DD-Payne K phys.temperature.effective float _RA.icrs Right ascension (ICRS) at Epoch=J2000, proper motions taken into account deg pos.eq.ra indexed _DE.icrs Declination (ICRS) at Epoch=J2000, proper motions taken into account deg pos.eq.dec indexed pmDE Proper motion in declination of the primary LAMOST star mas/yr pos.pm;pos.eq.dec double recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int GaiaDR2 Gaia DR2 source identifier of the primary LAMOST star meta.id;meta.main RA_ICRS Right ascension (ICRS) at Ep=2015.5 of the primary LAMOST star deg pos.eq.ra;meta.main DE_ICRS Declination (ICRS) at Ep=2015.5 of the primary LAMOST star deg pos.eq.dec;meta.main plx Parallax of the primary LAMOST star mas pos.parallax.trig float e_plx Error on plx mas stat.error;pos.parallax float pmRA Proper motion in right ascension of the primary LAMOST star mas/yr pos.pm;pos.eq.ra double e_pmRA Error on pmRA mas/yr stat.error;pos.pm;pos.eq.ra float e_pmDE Error on pmDE mas/yr stat.error;pos.pm;pos.eq.dec float Gmag Gaia DR2 G-band magnitude of the primary LAMOST star mag phot.mag;em.opt double Payne Star ID from the DD-Payne catalogue meta.id char [Fe/H] Iron abundance of the LAMOST star measured by DD-Payne phys.abund.Fe float logg Surface gravity of the LAMOST star measured by DD-Payne log(cm.s**-2) phot.sb float vtot Total velocity with respect to the local standard of rest km/s phys.veloc;pos.lsr double zmax Maximum Galactic height of the Galactic orbit kpc pos.cartesian.z;pos.galactic double GaiaDR22 Gaia DR2 source identifier of the companion meta.id.assoc RA2deg Right ascension (ICRS) at Ep=2015.5 of the companion deg pos.eq.ra DE2deg Declination (ICRS) at Ep=2015.5 of the companion deg pos.eq.dec plx2 Parallax of the companion mas pos.parallax.trig float e_plx2 Error on plx2 mas stat.error float pmRA2 Proper motion in right ascension of the companion mas/yr pos.pm;pos.eq.ra double e_pmRA2 Error on pmRA2 mas/yr stat.error;pos.pm;pos.eq.ra float pmDE2 Proper motion in declination of the companion mas/yr pos.pm;pos.eq.dec double e_pmDE2 Error on pmDE2 mas/yr stat.error;pos.pm;pos.eq.dec float Gmag2 Gaia DR2 G-band magnitude of the companion mag phot.mag;em.opt double Sep Physical separation of the wide binary AU pos.angDistance float RV Relative velocity of the wide binary projected on the sky km/s phys.veloc;pos.heliocentric double