J/MNRAS/482/658ivo://CDS.VizieR/J/MNRAS/482/658doi:10.26093/cds/vizier.74820658CDSXue H.-F.Fu J.-N.Mowlavi N.Saesen S.Barblan F.Yang Y.Niu J.-S.2024-08-19T20:15:21Z2022-08-01T13:28:56ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsvariable-starsopen-star-clustersvisible-astronomyIn this work, we have studied the variable stars in the young open cluster NGC 1893 based on a multiyear photometric survey covering a sky area around the cluster up to 31arcminx31arcmin wide. More than 23000 images in the V band taken from 2008 January to 2017 February with different telescopes, complemented with 90 images in the B band in 2014 and 2017, were reduced, and light curves were derived in V for 5653 stars. By analysing these light curves, we detected 147 variable stars (85 of them being new discoveries), including 110 periodic variables, 15 eclipsing binaries, and 22 non-periodic variables. Proper motions, radial velocities, and colour-magnitude and two-colour diagrams were used to identify the cluster membership of these variable stars, resulting in 84 members. Periodic variable members were then classified into different variability types, mainly according to their magnitudes and to their periods of variability, as well as to their positions in the Hertzsprung-Russell diagram for the early-type stars. As a result, among main-sequence periodic variable members, we identified five {beta} Cep candidates, seven slowly pulsating B-type candidates, and thirteen fast-rotating pulsating B-type (FaRPB) candidates (one of which is a confirmed classical Be star). While most of the FaRPB stars display properties similar to the ones discovered in NGC 3766 by Mowlavi et al., five of them have periods below 0.1d, contrary to expectations. Additional observations, including spectroscopic, are called for to further characterize these stars. We also find a binary candidate harbouring a {delta}-Scuti candidate.2019MNRAS.482..658Xhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/482/658CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/482/658https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/482/658http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/482/658https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/482/658https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/482/658http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/482/658GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/482/658/tablea1 (The photometric and kinematic data of variable stars in the FOV of NGC 1893)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/482/658/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/482/658/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/482/658/tablea1?GETtext/xml+votable180.050000true80.7810333.497820.0055555555555555566/1285 1287 1296 12987.952274030004205e-20 4.920466254354166e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/482/658?format=asciiOpticaldefaultJ/MNRAS/482/658/tableb1*Periodic variable stars in the FOV of NGC 1893recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDStar IDmeta.id;meta.mainintPerPerioddtime.perioddoublee_PerPeriod errordstat.errordoubleAmpAmplitude of variationmmagarith.rate;phot.magfloate_AmpAmplitude of variation errormmagstat.errorfloatS/NSignal-to-noise ratiostat.snrfloatMembMembershipmeta.code.membercharSpTypeSpectral typesrc.spTypecharn_SpType[ab] Note on SpType (1)meta.notecharClassClassificationmeta.code.classcharDiscDiscovery (2)meta.bibcharJ/MNRAS/482/658/tablea1The photometric and kinematic data of variable stars in the FOV of NGC 1893recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPerindicates period(s) in tableb1meta.ref.urlcharID1? WEBDA number (http://www.univie.ac.at/webda/)meta.idintnullableID2Identification number of variable stars given by Lata et al. (2012MNRAS.427.1449L, 2014MNRAS.442..273L, Cat. J/MNRAS/442/273) [LPC2012] VNN in Simbadmeta.idcharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainBmagStandardized B magnitudemagphot.mag;em.opt.Bfloate_BmagError on Bmagmagstat.error;phot.magfloatVmagStandardized V magnitudemagphot.mag;em.opt.Vfloate_VmagError on Vmagmagstat.error;phot.magfloatpmRA? Proper motion on right ascension from the PPMXL catalogue (Roeser et al. 2010AJ....139.2440R, Cat. I/317)mas/yrpos.pm;pos.eq.rafloatnullablee_pmRA? Error on pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE? Proper motion on declination from the PPMXL catalogue (Roeser et al. 2010AJ....139.2440R, Cat. I/317)mas/yrpos.pm;pos.eq.decfloatnullablee_pmDE? Error on pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatnullableRV? Radial velocity from Xiang et al. (2017MNRAS.467.1890X)km/sphys.veloc;pos.heliocentricintnullablee_RV? Error on RVkm/sstat.errorintnullableU-B? U-B colour index from Lim et al. (2014MNRAS.443..454L, Cat. J/MNRAS/443/454)magphot.color;em.opt.U;em.opt.Bfloatnullablee_U-B? Error on U-Bmagstat.error;phot.color;em.opt.UfloatnullableB-V? B-V colour index from Lim et al. (2014MNRAS.443..454L, Cat. J/MNRAS/443/454)magphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V? Error on B-Vmagstat.error;phot.color;em.opt.BfloatnullableJmag? 2MASS J magnitude (Cutri et al. 2003tmc..book.....C, Cat. II/246)magphot.mag;em.IR.Jfloatnullablee_Jmag? Error on Jmagmagstat.error;phot.magfloatnullableHmag? 2MASS H magnitude (Cutri et al. 2003tmc..book.....C, Cat. II/246)magphot.mag;em.IR.Hfloatnullablee_Hmag? Error on Hmagmagstat.error;phot.magfloatnullableKmag? 2MASS K magnitude (Cutri et al. 2003tmc..book.....C, Cat. II/246)magphot.mag;em.IR.Kfloatnullablee_Kmag? Error on Kmagmagstat.error;phot.magfloatnullableIDStar IDmeta.id;meta.mainintprimary