J/A+A/710/A319ivo://CDS.VizieR/J/A+A/710/A319CDSYang B.Bu Y.Zhang Y.Li Q.Lu G.Zhang J.Yi Z.Kong X.Liu M.2026-06-24T09:23:09Z2026-06-24T09:32:05ZCDS support team

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

cds-question@unistra.frsubdwarf-starsspectroscopic-binary-starssurveysradial-velocityphotometryvisible-astronomyHot subdwarf binaries provide stringent constraints on envelope stripping and binary mass transfer. However, robust identification of these systems in large spectroscopic surveys is hindered by variable data quality and the subtle signatures of their companions. We aim to develop a robust automated framework for identifying binaries comprising a hot subdwarf and a main-sequence star within the diverse datasets of the LAMOST low-resolution survey, utilizing deep learning to overcome challenges posed by complex noise and class imbalance. We propose a Bayesian hybrid model that combines convolutional neural networks for local feature extraction with a Bayesian transformer encoder to model long-range dependencies. This architecture incorporates variational inference to improve classification accuracy and facilitate robust candidate identification. The framework attains an accuracy of 95.3% on the test set, with a precision of 97.2% for the binary class. Applying the model to the LAMOST dataset yields 1161 binary candidates. Further certification via spectral energy distribution fitting confirms 968 binaries among the 1001 objects with reliable fits. Multi-epoch radial velocity measurements of 352 candidates identified 119 systems with significant variability. A subset of the candidates show no significant radial velocity changes over baselines exceeding 1000 days despite exhibiting infrared excess, consistent with the behavior of long-period binaries. The proposed Bayesian framework effectively quantifies predictive uncertainty to filter out data artifacts, yielding a sample suitable for constraining evolutionary pathways such as common envelope ejection and stable Roche lobe overflow.2026A&A...710A.319Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/710/A319CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/162 : LAMOST DR11 catalogs (Luo+, 2026)J/PASJ/76/1084 : MK-like spectral classification (Zou+, 2024)J/A+A/693/A268 : Hot sub-luminous and binaries variabilityhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/710/A319https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/710/A319http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/710/A319https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/710/A319https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/710/A319http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/710/A319GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/710/A319/main2 (Main catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/710/A319/main2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/710/A319/main2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/710/A319/main2?GETtext/xml+votable180.050000true111.4606-1.991271110.005555555555555556Cone search capability for table J/A+A/710/A319/xmat2 (Literature subset)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/710/A319/xmat2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/710/A319/xmat2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/710/A319/xmat2?GETtext/xml+votable180.050000true130.542985-2.221288060.0055555555555555565/6081 6/3 10 129 135 143 207 221 285 305 309 319 335 341-342 368 399 408 413 428 433 445 459 461 473 478 502 507 620 631 643 653 678 681 691 716 728 748 773 776 795 921 951 958 1012 1095 1106 1109 1115 1139 1154 1163-1164 1194 1225 1241 1258 1282 1287 1295 1305 1307 1310 1352 1360 1397 1419 1447 1450-1451 1480 1519 1540 1569 1573 1578 1589 1594 1601 1628 1633 1651 1697 1714 1743 1751 1764 1796 1801 1803 1845 1905 1913 1931 1951 2038-2039 2104 2106 2122 2178 2207 2218 2231 2241-2242 2261 2276 2319 2331 2359 2368 2390-2391 2422 2424 2441 2443 2449 2454 2474 2490 2514 2522 2578 2588 2661 2664 2670 2678 2689 2693 2738 2751 2785 2806 2809 2816 2823 2849 2873 2876 2902 2944 2975 2982 2998 3006 3026 3093 3095 3108 3117 3136 3152 3166 3176 3197 3209 3238 3242 3246 3250 3262 3330 3360 3385 3417 3586 3592 3630 3690 3772 4096 4103-4104 4120 4122 4128-4129 4213 4229 4231 4247 4276 4285-4286 4307 4318-4319 4337 4349 4351 4359 4374 4388 4392 4440-4441 4447 4485 4514 4576 4580 4616-4617 4628 4630 4632 4639 4663 4669 4677-4678 4685 4687 4694 4703 4718 4734 4753 4755 4762 4785 4803 4837 4857 4860 4880 4906 4929 4932 4934 4951 4970 4977 5019 5036 5104 5131 5171 5193 5224 5240 5244 5254 5272 5290 5317 5335 5345 5425 5439 5465 5505 5573 5620 5623 5643 5659-5661 5671 5717 5736 5751 5773 5803-5804 5807 5938 5960 5975 5986 6037 6046 6060 6105 6108 6169 6171 6177 6198 6212 6215 6231 6249 6282 6292-6293 6325-6327 6333 6342 6345 6363 6366 6373 6378 6385 6422 6428 6463 6479 6496 6498 6503 6662 6674 6679-6680 6698 6708 6718 6724 6757 6772 6803 6837 6842 6892 6924 6933 6952 6956 6981 7008 7013 7021 7062 7072 7113 7160 7169 7257 7319-7320 7359 7370 7409 7416 7503 7568 7744 7792 7823 7845-7846 7861 7882 8195 8210 8231 8240 8243 8276 8319 8333 8350 8391 8398 8420 8439 8453 8473 8500 8550 8562 8603 8608 8634 8695 8746 8756 8764 8778 8785 8838 8847 8852 8888 8915 8928 8940 8943 8959 8994 9003 9017 9047 9052 9066 9072 9080-9081 9087 9094-9095 9130 9158 9189 9191 9242 9265 9276 9298 9320 9348 9353 9363 9373 9375 9377 9386 9390 9394 9404 9478 9481 9485 9533 9578 9588 9612 9688 9721 9819 9828 9869 9872 9907-9908 9948 9997 10020-10021 10049 10112 10124 10260 10294 10296 10318-10319 10333 10335 10398 10437 10471 10485 10514 10541 10574 10591 10661 10720-10721 10724 10741 10794 10824 10849 10886 10915 10948-10949 10966 10980 11040 11057 11077 11107 11118 11184 11191 11291 11307 11336 11354-11355 11377 11410 11434 11470 11473 11570 11576 11658 11782 11785 11832 11864 11888 12017-12018 12022 12297 12300 12337 12378 12380 12388 12405 12448 12451 12499 12502-12503 12531 12574 12579-12580 12588 12672 12717 12726 12780 13060 13149 13175 13223 13242 13254 13261 13268 13274 13317 13354 13359 13391 13416 13429 13483 13547 13652-13653 13673 13762 13776 13795 13804 13834 13955 13960 14126 14210 14212-14213 14227 14241 14391 14433 14557 14562 14573 14582 14588 14591 14730-14731 14761 14771 14780 14782 14818 14830 14926-14927 14951 14966 14971-14972 14978 14987 14997 15041 15056 15062 15108 15120-15121 15123 15130 15137 15144 15152 15178 15200 17393 17717 17747-17748 17761 17774 17787 17790 17905 18031 18041 18074 18101 18103 18110 18126 18133-18134 18151 18164 18208 18222 18267 18310 18315-18316 18340 18354 18361 18394 18404 18407 18415 18556 18645 18652 18670 18794 18864 18866 18878 18904 18917 18934 18996 19007 19009 19087 19091 19099 19108-19109 19115 19122 19125 19140 19148 19161 19206-19207 19239 19271 19277 19282 19311 19327 19335 19346 19363-19364 19374 19393 19408 19413 19429 19437 19464 19468 19472 19475 19508 19552 19584 19623-19624 19631 19648 19744 19810 19854 19869 19884 19886 19939 19952 19982 20074 20078 20080 20084 20118 20146 20151 20167-20168 20175 20207 20237 20241 20247 20254 20281 20310 20344 20348 20397 20399 20422 20430 20436 20442 20449 20478 21465 21470 21488 21499 21694 21754-21756 21778 21786 21798 21807 21809 21821 21825 21830-21831 21856 21866 21875 21879 21894 21960 22061 22081 22089 22091 22100 22106 22117 22119-22121 22123 22127 22185 22188 22210 22240 22242 22261 22280 22286 22289 22292 22311 22316 22334-22335 22388 22400 22404-22405 22407 22410-22411 22416-22417 22419 22433 22441 22446 22461 22472 22474 22476 22480 22492 22494 22505 22509 22513 22843 22884 22902 22962 22975 22991 22994 23015 23094 23121 23149 23182 23187 23231 23356 23405 23435 23465 23545 23548 23607 23618 23623 23626 23637 23649 23672 23675 23706 23714 23761 23777 23798-23799 23806 23815 23818 23838 23847 23852 23863 23908 23919-23920 23937 23942-23943 23945-23946 23961 23963 23965 23972-23973 23975 23986 23989 23992 23995 23998-23999 24004-24005 24010 24013-24015 24021-24022 24032 24035-24037 24039 24059 24087 24118 24147 24153 24158-24159 24192 24200 24218 24221 24258 24261 24290 24320 24330 24337-24339 24341 24345 24348-24349 24369 24371 24385 24390 24396-24397 24426 24480 24500 24513 24530 24564 25576 25854 25904 25919 25950 25974 25998 26030 26055 26089 26091 26094 26164 26186 26193 26208 26293 26298 26319 26338 26365 26399 26431 26446 26451 26516 26520 26541 26558 26567 26575 26584 26598 26607 26617 26619 26844 26903 26906 26908 26928 26933 26946 26960 26962 26971 26979 26981 26993-26994 27000 27003 27007 27018 27025 27029 27039 27044 27049-27050 27056 27090 27130 27154 27199 27218 27227 27235 27249 27251 27253 27255 27307 27312-27313 27351 27390 27392 27395 27411 27436 27442 27472 27502 27504 27506-27507 27516 27536 27603 27636 27639 27657 27682 27686 27689 27705 27713 27724 27776 27779 27781 27785 27788 27814 27817 27863 27868 27870 27892 27911 27945 27964 27979 28016 28035 28068 28078 28094 28133 28142 28145 28157 28185 28188 28261 28264 28328 28334 28371 28415 28420 28480-28481 28504 28521 28625 30065 30201 30204 30549 31068 31091 31096 31179 31206 31254 31295 31312 31320 31342 31357 31359 31381 31387 31392 31433-31434 31439 31441 31466 31468 31476 31478 31637 31714 31789 31795 31800 31838 31860 31879 31948 31982 32034 32133 32138 32283 32307 32310 32331 32333 32354 32375 32521 32614 32633 32637 32692 32694 36723 40955 448911.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/710/A319?format=asciiOpticaldefaultJ/A+A/710/A319/main2Main catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintUIDInternal unique source identifiermeta.id;meta.maincharObsIDLAMOST observation identifiermeta.id;obs.param;obsRA_ICRSLAMOST right ascension (ICRS)degpos.eq.ra;meta.mainDE_ICRSLAMOST declination (ICRS)degpos.eq.dec;meta.mainSNRgLAMOST g band S/Nstat.snrfloatzLAMOSTLAMOST pipeline redshiftsrc.redshift;pos.heliocentricdoubleRAGdeg? Gaia DR3 right ascension (ICRS) at Ep=2016.0degpos.eq.ranullableDEGdeg? Gaia DR3 declination (ICRS) at Ep=2016.0degpos.eq.decnullableGMatch? LAMOST Gaia match distancearcsecpos.angDistancefloatnullablePbinMean binary probabilitystat.fit.goodnessfloate_PbinStandard deviation of Pbinstat.errorfloatBinEvidEvidence tagmeta.codecharFUPriorFollow up prioritymeta.codecharRVRes? RV data setmeta.idcharNRV? Number of RV epochsmeta.numberintnullableRVlogP? log10(p) for RV constancystat.fit.paramdoublenullablen_RVlogP[i] i for -infinitymeta.notechardRVmax? Maximum RV spankm/sphys.velocfloatnullablee_dRVmax? Uncertainty of dRVmaxkm/sstat.errorfloatnullableGaiaDR3? Gaia DR3 source_id (some erroneous identifiers)meta.idnullablePlx? Gaia parallaxmaspos.parallaxfloatnullablee_Plx? Uncertainty in Plxmasstat.error;pos.parallaxfloatnullablepmRA? Gaia PM in RA*cos(Dec)mas/yrpos.pm;pos.eq.rafloatnullablee_pmRA? Uncertainty in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE? Gaia PM in Decmas/yrpos.pm;pos.eq.decdoublenullablee_pmDE? Uncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatnullableRUWE? Gaia RUWE indexstat.errorfloatnullableGmag? Gaia G mean magnitudemagphot.mag;em.optfloatnullableBPmag? Gaia BP mean magnitudemagphot.mag;em.opt.BfloatnullableRPmag? Gaia RP mean magnitudemagphot.mag;em.opt.RfloatnullableBP-RP? Gaia BP-RP color indexmagphot.color;em.opt.B;em.opt.RfloatnullableGDist? Gaia based distancepcpos.distancedoublenullableAV? V band extinctionmagphys.absorptionfloatnullableTeff1? Primary effective temperatureKphys.temperature.effectivefloatnullablelogg1? Primary surface gravitylog(cm.s**-2)phys.gravityfloatnullableTeff2? Companion effective temperatureKphys.temperature.effectivefloatnullablelogg2? Companion surface gravitylog(cm.s**-2)phys.gravityfloatnullableRad1? Primary radiussolRadphys.size.radiusdoublenullableLum1? Primary luminositysolLumphys.luminositydoublenullableRad2? Companion radiussolRadphys.size.radiusdoublenullableLum2? Companion luminositysolLumphys.luminositydoublenullableJ/A+A/710/A319/xmat2Literature subsetDE_ICRSLAMOST declination (ICRS)degpos.eq.dec;meta.mainRAGdeg? Gaia DR3 right ascension (ICRS) at Ep=2016.0degpos.eq.ranullableDEGdeg? Gaia DR3 declination (ICRS) at Ep=2016.0degpos.eq.decnullableSNRgLAMOST g band S/Nstat.snrfloatzLAMOSTLAMOST pipeline redshiftsrc.redshift;pos.heliocentricdoublePbinMean binary probabilitystat.fit.goodnessfloate_PbinStandard deviation of Pbinstat.errorfloatBinEvidEvidence tagmeta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintUIDInternal unique source identifiermeta.id;meta.maincharObsIDLAMOST observation identifiermeta.id;obs.param;obslongGaiaDR3? Gaia DR3 source_id (some erroneous identifiers)meta.idnullableRA_ICRSLAMOST right ascension (ICRS)degpos.eq.ra;meta.mainFUPriorFollow up prioritymeta.codecharRVRes? RV data setmeta.idcharNRV? Number of RV epochsmeta.numberintnullableRVlogP? log10(p) for RV constancystat.fit.paramdoublenullabledRVmax? Maximum RV spankm/sphys.velocfloatnullablee_dRVmax? Uncertainty of dRVmaxkm/sstat.errorfloatnullableTeff1? Primary effective temperatureKphys.temperature.effectivefloatnullablelogg1? Primary surface gravitylog(cm.s**-2)phys.gravityfloatnullableTeff2? Companion effective temperatureKphys.temperature.effectivefloatnullablelogg2? Companion surface gravitylog(cm.s**-2)phys.gravityfloatnullablePlx? Gaia parallaxmaspos.parallaxfloatnullablee_Plx? Uncertainty in Plxmasstat.error;pos.parallaxfloatnullableRUWE? Gaia RUWE indexstat.errorfloatnullableGmag? Gaia G mean magnitudemagphot.mag;em.optfloatnullableBP-RP? Gaia BP-RP color indexmagphot.color;em.opt.B;em.opt.RfloatnullableRefMatched literature reference (1)meta.ref;pos.framecharSpClass? Source paper spectral classmeta.bibcharHeClass? Source paper helium classsrc.classcharLumClass? Source paper luminosity classmeta.bibcharsTeff? Source paper effective temperatureKphys.temperatureintnullableslogg? Source paper surface gravitylog(cm.s**-2)phys.gravityfloatnullableslogHe? Source paper log(NHe/NH)phys.abundfloatnullablesSNRu? Source paper u band S/Nstat.snrfloatnullablePerG? Source paper Gaia perioddtime.perioddoublenullablee_PerG? Error in PerGdstat.errorfloatnullablePerT? Source paper TESS perioddtime.perioddoublenullablee_PerT? Error in PerTdstat.errorfloatnullable