J/MNRAS/523/2172ivo://CDS.VizieR/J/MNRAS/523/2172doi:10.26093/cds/vizier.75232172CDSLin J.Wang X.Mo J.Xi G.Filippenko A.V.Yan S.Brink T.G.Yang Y.,Wu C.Nemeth P.Li G.Guo F.Guo J.Cai Y.Xiong H.Zheng W.,Liu Q.Zhang J.Jiang X.Chen L.Xia Q.Peng H.Chen Z.Li W.,Lin W.Xiang D.Ma X.Liu J.2025-08-21T20:13:32Z2023-06-06T09:20:22ZCDS support team

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

cds-question@unistra.frsurveysvariable-starsphotometryvisible-astronomyeffective-temperatureOver the past few years, wide-field time-domain surveys like ZTF and OGLE have led to discoveries of various types of interesting short-period stellar variables, such as ultracompact eclipsing binary white dwarfs, rapidly rotating magnetised white dwarfs (WDs), transitional cataclysmic variables between hydrogen-rich and helium accretion, and blue large-amplitude pulsators (BLAPs), which greatly enrich our understandings of stellar physics under some extreme conditions. In this paper, we report the first-two-year discoveries of short-period variables (i.e., P<2hr) by the Tsinghua University-Ma Huateng Telescopes for Survey (TMTS). TMTS is a multi-tube telescope system with a field of view up to 18deg^2^, which started to monitor the LAMOST sky areas since 2020 and generated uninterrupted minute-cadence light curves for about ten million sources within 2 years. Adopting the Lomb-Scargle periodogram with period-dependent thresholds for the maximum powers, we identify over 1,100 sources that exhibit a variation period shorter than 2hr. Compiling the light curves with the Gaia magnitudes and colours, LAMOST spectral parameters, VSX classifications, and archived observations from other prevailing time-domain survey missions, we identified 1,076 as delta Scuti stars, which allows us study their populations and physical properties in the short-period regime. The other 31 sources include BLAPs, subdwarf B variables (sdBVs), pulsating WDs, ultracompact/short-period eclipsing/ellipsoidal binaries, cataclysmic variables below the period gap, etc., which are highly interesting and worthy of follow-up investigations.2023MNRAS.523.2172Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/523/2172CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-)I/345 : Gaia DR2 (Gaia Collaboration, 2018)V/164 : LAMOST DR5 catalogs (Luo+, 2019)J/MNRAS/523/2193 : TMTS flare study from the first two years (Liu+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/523/2172https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/523/2172http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/523/2172https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/523/2172https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/523/2172http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/523/2172GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/523/2172/dsct (Catalogue for delta Scuti stars identified from TMTS observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/523/2172/dsct?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/523/2172/dsct?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/523/2172/dsct?GETtext/xml+votable180.050000true0.012357.927580.0055555555555555565/277 339 345 354 371 379 430-431 727 750 757 771-772 833 6/20 325 336 369 831 842 866 870 872 874 889 973-974 980-981 997 1004-1006 1013-1015 1017 1019 1023-1024 1031 1040 1082 1106 1116 1124-1125 1139 1142 1147 1150-1151 1161 1232 1236 1244-1245 1255 1265-1270 1275 1279-1280 1288 1293 1297-1298 1301 1305 1310 1319 1322 1329 1334 1336 1338-1340 1342-1343 1345 1348 1351 1354 1360 1362-1363 1366 1369-1373 1377-1378 1385 1388 1392-1393 1404 1407-1409 1412-1413 1422 1424-1425 1428 1434 1437 1439 1448 1457 1461 1463 1479 1482 1492-1493 1504-1506 1509-1510 1512-1514 1525 1538 1541 1547 1549 1551 1555 1561-1563 1570 1580 1584-1585 1588 1593-1596 1621 1623 1626-1628 1632 1637 1641 1643-1645 1647-1648 1651-1652 1665-1666 1668-1670 1675 1683-1685 1687 1689 1693 1699-1700 1703-1706 1708 1710-1711 1714-1715 1718-1719 1728 1732 1745 1749 1751 1756 1767 1772-1773 1778-1779 1784-1785 1787 1794 1808-1809 1811 1813-1816 1818 1830 1834 1838 1857-1859 1861 1863-1864 1869 1910 1916 1921-1922 1924-1926 1928 1930 1936 1959 1967 1975 1981 1989-1991 1993-1995 1997 2002-2003 2011 2018 2028 2124 2170 2325 2369 2372 2388 2391 2397 2422 2424 2427-2430 2462 2492 2501 2503 2509 2539 2543 2600 2602 2824 2830 2832-2833 2835-2837 2839-2840 2887 2891-2892 2895-2896 2901-2902 2905 2907 2929 2932-2933 2939 2943 2995 2997-2999 3005-3007 3014-3015 3017-3018 3020-3022 3026 3033 3042 3051 3055 3064-3065 3067 3069 3076 3078-3079 3082-3083 3092 3094 3096-3097 3099-3100 3102-3104 3106 3108-3109 3117-3119 3121 3123 3125-3126 3128-3130 3146 3165 3167 3170 3176 3183 3195 3201 3205-3207 3216-3218 3220-3222 3224-3226 3228 3231 3237 3249 3253-3254 3263 3267-3268 3272 3274 3279 3281 3288 3290 3300 3309-3310 3331 3336 3340 3342-3343 3360-3361 3369 3371 3467 3498-3499 3507 3509 3512 3517 3519 3560 3584 3590 3592-3594 3596 3653 3655 3657 3661 3664 3671-3672 3674 3677 3697 3705 3710-3712 3725 3730 3745 3751 3761 3764 3769 3774 3796-3797 3799 3808 3810 3831 3842 3847 3850 3854 3857 3860 3865-3866 3868 3880 3884 3891 3897 3974 3983 4005 4049 4052 4054-4055 4060 4266 4277 4290 4292 4301 4320 4337 4373 4608 4620-4622 4634 4644 4868 4897 4911 4931 5073 5211 5431 5751 5928 5981 6036 6047 6262 6326 6328 6331 6333 6406 6436 6534 6640 6642 6667 6672 6689 6691 6699 6707 6710 6712-6713 6715-6716 6718-6719 6749 6751 6784-6786 6788 6790-6791 6793 6796 6798-6799 6806 6816 6818 6821 6825-6830 6854 6857 6863 6885 6889 6896 6902 6915 6921 6927 6945-6946 6951 6957-6958 6962 7032 7041 7142 7298 7333 7373 7697 8096 8192 8307 8936 9008 9084 9107 9117 9195 9211 9259 9325 9344 9396 9444 9446 9779 9841 9848 9863 9927 9932 9958 10143 10188 10203 10227 10233 10236 10322 10365 10395 10415 10512 10536 10538 10701 10705 11143 11158 11271 11287 11384 11462 11591 11632 12975 12988 12990 13600 13606 13612 13886 13930 13972-13973 13976-13977 13981 14001 14187 14189 14194 14200-14201 14205 14207 14253 14258 14264 14266-14267 14277 14279 14288 14645 14700 14759 14766 14770 15109 15622-15623 15629-15630 17857 18319 20436 21357 21370 21457 21460 21953 22013 22194-22196 22203 22205 22222-22223 22241-22242 22244 22247 22250 22252 22254-22255 22258 22264-22266 22315-22317 22319 22322 22329 22331 22381 22390 22392 22397 22399 22404 22407 22416-22417 22487 22879 22885 22897 22978 22989 22993 22995 23001 23004 23140 23211 23621 23699 23704-23705 23709 23732 23734 23740 23750 23752 23755 23757 23760 23764-23766 23768 23776 23983 23998 24195 24237 24239 24311 24318 24325 24327 24335 24339-24340 24347 24365 24380 24421 24431 24433 24435 24438 24443 24451-24453 24464-24465 24467-24468 24470-24473 24490 24506-24507 24510 24512-24513 24529 24533-24534 24536-24538 24554 24573 27397 27401 27410 27421 27863 28042 28531 30379 31541 31562 31628 31634 31747 31749-31751 31762 32457 32479 32498 32695https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/523/2172?format=asciiOpticaldefaultJ/MNRAS/523/2172/dsctCatalogue for delta Scuti stars identified from TMTS observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLAMOSTTypeSpectral class provided by LAMOST DR7src.spTypecharVSXTypeVSX variability typemeta.notecharNotes[CM] Note (1)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlcharIDTMTS identifier (TMTSJHHMMSSss+DDMMSSs)meta.id;meta.maincharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainPerDominant period corresponding to maximum power in Lomb-Scargle periodogrammintime.periodfloate_PerError of dominant periodminstat.errorfloatPwrMaxMaximum power in Lomb-Scargle periodogramsrc.var.indexfloatSNRSignal-to-noise ratio of variabilitystat.snr;src.varfloatAmpPeak-to-peak amplitude obtained from best-fitting modelmagsrc.var.amplitude;meta.modelledfloatL0Median magnitude obtained from the best-fitting modelmagphot.mag;em.IR.3-4umfloatR21Amplitude ratio of a2/a1src.var.amplitude;arith.ratiofloatphi21Phase difference of phi2-2*phi1stat.fit.paramfloatTmaxMJD of maximum lightdtime.epochdoubleGMAG? Absolute magnitude derived from Gaia DR2 databasemagphys.magAbsfloatnullable(B-R)0? Dereddening color derived from Gaia DR2 databasemagphot.color;em.opt.B;em.opt.RfloatnullableTeff? Mean effective temperature provided by LAMOST DR7Kphys.temperature.effective;stat.meanintnullablelogg? Mean surface gravity provided by LAMOST DR7log(cm.s**-2)phys.gravity;stat.meanfloatnullable