J/MNRAS/513/420ivo://CDS.VizieR/J/MNRAS/513/420doi:10.26093/cds/vizier.75130420CDSBriegal J.T.Gillen E.Queloz D.Hodgkin S.Acton J.S.Anderson D.R.,Armstrong D.J.Battley M.P.Bayliss D.Burleigh M.R.Bryant E.M.,Casewell S.L.Costes J.C.Eigmuller P.Gill S.Goad M.R.Gunther M.N.,Henderson B.A.Jackman J.A.G.Jenkins J.S.Kreutzer L.T.Lendl M.,Smith G.D.Tilbrook R.H.Watson C.A.West R.G.Wheatley P.J.2024-08-22T20:15:31Z2022-12-30T09:13:12ZCDS support team

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

cds-question@unistra.frvariable-starsphotometryWe analyse 829481 stars from the Next Generation Transit Survey (NGTS) to extract variability periods. We utilise a generalisation of the autocorrelation function(the G-ACF), which applies to irregularly sampled time series data. We extract variability periods for 16,880stars from late-A through to mid-M spectral types and periods between 0.1 and 130 days with no assumed variability model. We find variable signals associated with a number of astrophysical phenomena, including stellar rotation, pulsations and multiple-star systems. The extracted variability periods are compared with stellar parameters taken from Gaia DR2, which allows us to identify distinct regions of variability in the Hertzsprung-Russell Diagram. We explore a sample of rotational main-sequence objects in period-colour space, in which we observe a dearth of rotation periods between 15 and 25 days. This 'bi-modality' was previously only seen in space-based data. We demonstrate that stars in sub-samples above and below the period gap appear to arise from a stellar population not significantly contaminated by excess multiple systems. We also observe a small population of long-period variable M-dwarfs, which highlight a departure from the predictions made by rotational evolution models fitted to solar-type main-sequence objects. The NGTSdata spans a period and spectral type range that links previous rotation studies such as those using data from Kepler, K2 and MEarth.2022MNRAS.513..420Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/513/420CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/337 : Gaia DR1 (Gaia Collaboration, 2016)I/345 : Gaia DR2 (Gaia Collaboration, 2018)I/322 : UCAC4 Catalogue (Zacharias+, 2012)IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)II/311 : WISE All-Sky Data Release (Cutri+ 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/513/420https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/513/420http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/513/420https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/513/420https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/513/420http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/513/420GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/513/420/ngtsrot (Rotation periods and catalogue identifiers for 16880 stars observed with NGTS)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/513/420/ngtsrot?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/513/420/ngtsrot?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/513/420/ngtsrot?GETtext/xml+votable180.050000true94.88721-35.207620.0055555555555555564/1283 1536 1538 2142 2164 2719 2761 2967 3010 3016 5/2058 4104 4106 4716 4719 4739 4745 4792 4799 5124-5125 5127 5131 5136 5138 5146 5153 5155 5158 5160-5162 5172 5252 5254 6148-6150 6156 6158 6186 6191 6490 7505 7784 7786-7787 7830 8543 8551 8557-8559 8563-8566 8572 8574-8575 8636-8637 8645 8647 8660-8662 8664-8665 8680 8682 9015 9043 9046 9058 9165 9559 9563-9566 9587 9590 9593 9596 9598-9599 9685 9728-9730 10084 10086 10094 10180 10814 10871 10875 10908-10909 10919 10923-10926 10951 10957 10964-10966 10983 11023 11039 11043 11048-11050 11052-11054 11061 11140 11142 11510 11513 11516 11611 11614 11675 11696-11697 11699 11703 11705 11708-11710 11746 11756 11758 11863 11867 11889 11892-11893 12034 12039 12044 12046 12052-12053 12068 12070 12073 12120-12121 12141 12150-12151 12164-12165 12184 12186 12246-12247 12283-12284 12286 6/8237-8239 8250 8320-8321 8323-8326 12369 12372-12374 16395 16420 16422 16428 18829-18831 18840 18842-18843 18852-18853 18855 18868 18870-18873 18875 18920 18950-18951 18953-18955 18968 18970-18971 18976-18977 18992 19101-19103 19124-19125 19127 19133 19144 19146-19147 19176 19190-19191 19193-19195 19217 19220 19370 20487 20504-20505 20507 20517 20519 20521-20523 20550 20556 20576 20578-20579 20603 20606 20608 20618-20619 20624 20629 20652 20656 20672 20679 20692 20694-20697 20699-20700 20992 20999 21004-21005 21007 21014 21020 24604 24636 24640 24709 24720 24758 24761 24763 24810 25088 25105 25108-25109 25111 25152 25917 25919 25953-25955 25964 25966 25983 26048-26049 30017 30029 30032-30034 30967 30973 30975 31303 31309 31311 31313-31315 31318 31324-31326 31345 31348 31488-31489 31492 34171 34199 34203 34215 34220-34221 34223 34225-34227 34242 34247-34248 34250-34251 34268 34293-34295 34522-34524 34526-34527 34553 34556-34557 34576-34577 34587 34612-34613 34615 34652 34665 34668 34672 34698-34699 34726 34732 36055 36084-36085 36178 36190 36197 36199 36208-36210 36226 36238 36256-36258 36639 36659 36668-36669 36671 36704 36706-36707 36712 37542 37545-37548 37550-37551 38231 38235 38247 38268-38269 38271 38341 38343 38352 38354-38355 38381 38383 38388 38390-38391 38737 38924 39610-39611 39614-39615 40327 40333 40340 40342 40348-40350 40365-40367 40369-40371 40380 40382 40709 40724 43245 43247 43249-43251 43254 43260 43262 43483 43493-43495 43589 43591 43600-43602 43611-43612 43614-43615 43641 43644 43675 43687 43691 43708 43710-43711 43722 43744 43786 43798-43799 43803 43808 43825 43842 43845 43847-43848 43850-43851 43853 43868 43931 43953 43956-43957 43978 44000 44089-44091 44138 44154-44155 44165-44167 44169-44171 44204-44205 44207 44220 44222 44224 44234 44240-44241 44243 44252 44256 44330 44416 44544 44551 44556 44558-44559 44564-44566 44572 44581 46030-46031 46046 46061 46439 46450-46451 46455 46460-46461 46463 46533 46544 46699 46714 46793 46795 46800 46806-46807 46809-46811 46816-46817 46819 46829 46844 46846-46847 46976 46978-46979 47003 47008 47013 47015 47021 47028 47030 47036 47447 47451 47463 47467 47553 47564 47577 47580-47581 48128 48130-48131 48140 48153-48155 48180-48182 48188 48197 48202 48217 48220 48224 48278 48284 48288-48289 48291 48300 48304 48315 48318-48319 48462-48463 48492-48494 48496 48498 48542 48561-48563 48569 48572-48574 48589 48591 48594-48595 48598 48608 48610 48616 48624-48625 48628 48665 48668 48695 48704 48715 48740 48742-48743 48748-48750 48979 48982-48983 49009 49012-49014 49115 49127 49131 49140 49142-49143 49148-49150https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/513/420?format=asciidefaultJ/MNRAS/513/420/ngtsrotRotation periods and catalogue identifiers for 16880 stars observed with NGTSrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNGTSNGTS source designation (NGNNNN-NNNN-NNNN)meta.id;meta.maincharRAJ2000NGTS source right ascension (J2000)degpos.eq.ra;meta.mainindexedDEJ2000NGTS source declination (J2000)degpos.eq.dec;meta.mainindexedImagNGTS I-band magnitudemagphot.mag;em.opt.IdoublePerExtracted variability perioddsrc.vardoubleAmpl5-95 percentile relative fluxsrc.var.amplitudedoubleGAIADR1Cross-matched Gaia DR1 identifiermeta.idGAIADR2Cross-matched Gaia DR2 identifiermeta.idTIC? Cross-matched Tess Input Catalogue (v8) identifiermeta.idnullable2MASSCross-matched 2MASS identifiermeta.idcharWISECross-matched WISE identifiermeta.idcharUCAC4Cross-matched UCAC4 identifiermeta.idchar