J/PASP/132/K4202ivo://CDS.VizieR/J/PASP/132/K4202doi:10.26093/cds/vizier.61333202CDSGalliher N.W.Ratzloff J.K.Corbett H.Law N.M.Howard W.S.,Glazier A.L.Vasquez Soto A.Gonzalez R.2025-09-09T14:15:09Z2021-03-04T10:34:57ZCDS support team

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

cds-question@unistra.frsurveysvariable-starsstellar-distanceUsing photometric data collected by Evryscope-South, we search for nearby young variable systems on the upper main sequence (UMS) and pre-main sequence (PMS). The Evryscopes are all-sky high-cadence telescope arrays operating in the Northern and Southern hemispheres. We base our search on a Gaia-selected catalog of young neighborhood upper- and pre-main sequence stars which were chosen through both astrometric and photometric criteria. We analyze 44971 Evryscope-South light curves in search of variability. We recover 615 variables, with 378 previously known, and 237 new discoveries including 84 young eclipsing binaries (EB) candidates. We discover a new highly eccentric binary system and recover a further four previously known systems, with periods ranging from 299 to 674hr. We find 158 long-period (>50hr) candidate EB systems, 9 from the PMS and 149 from the UMS, which will allow constraints on the mass/radius/age relation. These long-period EBs include a 179.3hr PMS system and a 867.8hr system from the UMS. For PMS variable candidates we estimate system ages, which range from 1 to 23Myr for non-EBs and from 2 to 17Myr for EBs. Other non-EB discoveries that show intrinsic variability will allow relationships between stellar rotation rates, ages, activity, and mass to be characterized.2020PASP..132k4202Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/PASP/132/K4202CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/620/A172 : Solar neighbourhood young stars 3D mapping (Zari+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PASP/132/K4202https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/PASP/132/K4202http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/PASP/132/K4202https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/PASP/132/K4202https://vizier.iucaa.in/viz-bin/votable?-source=J/PASP/132/K4202http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/PASP/132/K4202GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/PASP/132/K4202/tablea1 (UMS variable system recoveries from this survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/PASP/132/K4202/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/PASP/132/K4202/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/PASP/132/K4202/tablea1?GETtext/xml+votable180.050000true0.2379-54.75580.005555555555555556Cone search capability for table J/PASP/132/K4202/tablea2 (PMS variable system recoveries from this survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/PASP/132/K4202/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/PASP/132/K4202/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/PASP/132/K4202/tablea2?GETtext/xml+votable180.050000true22.1481-54.56560.0055555555555555566/6 14 4147 4175 4193 8339 12319 12334 12355 12456 16449 17178 17401 17545 17792 18442 18554 18586 18632 19180 19207 20484 20494 20518 20579 20679-20680 20763 20777 20794 20796 20853 20881 21097 21167 21254 21283 21309 21365 21383-21384 21403 21421 21448 21452 21468 21495 21526 21529 21532 21550 21558 21562 21626 21649 21664 21706 21732 21755 21772 21798 21877 21922 21924 21939 21942 21981 22035 22081 22107 22128 22141 22156 22166 22222 22241 22264 22267 22283 22302 22304 22330 22601 22610 22726 22735 22789 22792 22850 22859 22861 22884 22893 22895 22927 22992 23029 23049 23100 23159 23302 23313 23347 23352 23363 23375 23380 23573 23587 23627 23652 24577 24608 24613 25026 25211 25238 25256 25285 25318 25451 25464 25583 25614 25706 25922 26006 26042 26339 26382 26679 26720 27443 27534 28719 28801 28844-28845 28853 28856 28904 28947 28991 29065 29089 29096 29110 29126 29156 29164 29187 29194 29209 29211 29243 29257 29268 29271 29287 29319 29385 29403 29464 29486 29548 29593 29701 29730 29736 29774 29804 29810 29868 29952 29985 29997 30077 30094 30238 30291 30307 30317 30323 30375 30426 30448 30463 30506 30524 30533 30536 30601 30607-30608 30741 30949 30959 31012 31214 31242 31461 31770 31780 31800 31812 32906 32969 33003 33110 33241 33478 33563 33652 33894 33980 34011 34133 34138-34139 34165 34170 34260 34565 34614 34895 34986 35026 35278 35400 35464 35647 35960 36120 36167 36199 36267 36351 36913 36945 36948 36959 37012 37060 37121 37154 37176 37181 37189 37202 37253 37261 37282 37296 37361 37440 37461 37469 37472 37493 37502 37633 37647 37699 37743 37756 37843 37862 37879 37882 37890 37912 37928 38014 38035 38127 38191 38199 38266 38285 38341 38359 38404 38439 38441 38453-38454 38482 38512 38514 38576 38588 38627 38677 38685 38806 38810 38817 38896 39003 39020 39027 39034 39166 39181 39184 39188 39199 39224-39225 39241 39270 39273 39290 39304 39306 39308 39315 39342 39349 39351 39379 39449 39480 39487 39553 39575 39614 39622 39628 39631 39636 39691-39692 39699 39718 39720 39762 39768 39776 39815 39860 39873 39882 39884 39904 39917 39931 39939 39975 40005 40012 40027 40034 40082 40124 40256 40455 40482 40489 40496-40497 40578 40591 40636 40657 40662 40809 40839 40862 40904 40911 40976 41013 41015 41127 41130 41133 41195 41327 41349 41354 41415 41427 41445 41451 41455 41492 41515 41598-41599 41601 41606-41607 41616 41643 41648 41658 41680 41683 41686 41690 41704 41714 41725 41768 41862 41872 41880 41889 41894 41901 41939 41944 41948 41963 41966 41976-41977 41981 42032 42035 42043 42050 42052 42059 42080 42089 42117 42124 42165 42173 42177 42268 42272 42277 42302 42337 42344 42368-42369 42373 42376 42394 42423 42439 42484-42485 42499 42506 42536 42541 42543 42555 42564 42597-42598 42610 42617 42653 42675 42729 42751 42765-42766 42771 42778 42783 42804-42805 42809-42810 42855 42871 42885 42930 42940 42950 42952-42953 42990 43004 43012 43015 43031 43044 43083 43099 43109 43124 43150 43170 43181 43192 43239 43242 43250 43272 43289 43293-43294 43300 43324 43342 43350 43358 43372 43392 43406 43411 43431-43433 43458 43465 43474 43510 43526 43529 43535-43536 43548 43568 43576 43579 43608 43611 43670 43704 43716 43847 44069 44074 44104-44105 44111 44114 44175 44303 44309 44311 44316 44356 44363 44379 44388 44400 44406 44536 44550 44637 44949 45118 45197 45229 45238 45283 45292 45403 45484 45687 45708 45714 45879 45979 46035 46278 46438 47109 47116 47120 47158 47283 47286 47369 47473 47513 47654 47732 47795 47815 47823 47828 47853 47863 47867 47966 48032 48041 48048 48108 48293 48414 48560 48619 48695 48738 48791 48801 48883 48941 49056 49064https://cdsarc.cds.unistra.fr/viz-bin/moc/J/PASP/132/K4202?format=asciidefaultJ/PASP/132/K4202/tablea1UMS variable system recoveries from this surveyPerPeriodhtime.perioddoubleTypeType (G2)src.classcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameEVRJ name (EVRJDDD.dddd+DD.ddd)meta.id;meta.maincharn_Name[*] Note (G1)meta.notechare_Perrms uncertainty on Periodhstat.errordoubleAmpFitted amplitude for sinusoid for non-EBmagsrc.var.amplitudefloate_Amprms uncertainty on fitted amplitude for sinusoidmagstat.errorfloatSecAmp? Fitted amplitude for inverted Gaussian for EBsmagsrc.var.amplitudefloatnullablee_SecAmp? rms uncertainty on fitted amplitude for inverted Gaussianmagstat.errorfloatnullableMassMasssolMassphys.massfloatDistDistancepcpos.distanceinte_Distrms uncertainty on distancepcstat.errorintPrimDur? Primary eclipse duration (in phase unit)time.intervalfloatnullableSecDur? Secondary eclipse duration (in phase unit)time.intervalfloatnullablet0? zeroth epoch for the primary eclipse (MJD)dtime.epochdoublenullableRefReferences, in refs.dat filemeta.ref;meta.filechar_RAPosiiton from name (right ascension part)degpos.eq.ra;meta.main_DEPosiiton from name (declination part)degpos.eq.dec;meta.mainJ/PASP/132/K4202/tablea2PMS variable system recoveries from this surveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameEVRJ name (EVRJDDD.dddd+DD.ddd)meta.id;meta.maincharn_Name[*] Note (G1)meta.notecharTypeType (G2)src.classcharPerPeriodhtime.perioddoublee_Perrms uncertainty on Periodhstat.errordoubleAmpFitted amplitude for sinusoid for non-EBmagsrc.var.amplitudefloate_Amprms uncertainty on fitted amplitude for sinusoidmagstat.errorfloatSecAmp? Fitted amplitude for inverted Gaussian for EBsmagsrc.var.amplitudefloatnullablee_SecAmp? rms uncertainty on fitted amplitude for inverted Gaussianmagstat.errorfloatnullableMassMasssolMassphys.massfloatlogAgeAgelog(yr)time.agefloatDistDistancepcpos.distanceinte_Distrms uncertainty on distancepcstat.errorintPrimDur? Primary eclipse duration (in phase unit)time.intervalfloatnullableSecDur? Secondary eclipse duration (in phase unit)time.intervalfloatnullablet0? zeroth epoch for the primary eclipse (MJD)dtime.epochdoublenullableRefReferences, in refs.dat filemeta.ref;meta.filechar_RAPosiiton from name (right ascension part)degpos.eq.ra;meta.main_DEPosiiton from name (declination part)degpos.eq.dec;meta.mainJ/PASP/132/K4202/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.note;meta.maincharprimaryBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notechar