J/ApJS/253/11ivo://CDS.VizieR/J/ApJS/253/11doi:10.26093/cds/vizier.22530011CDSPlachy E.Pal A.Bodi A.Szabo P.Molnar L.Szabados L.Benko J.M.,Anderson R.I.Bellinger E.P.Bhardwaj A.Ebadi M.Gazeas K.,Hambsch F.-J.Hasanzadeh A.Jurkovic M.I.Kalaee M.J.Kervella P.,Kolenberg K.Mikolajczyk P.Nardetto N.Nemec J.M.Netzel H.,Ngeow C.-C.Ozuyar D.Pascual-granado J.Pilecki B.Ripepi V.,Skarka M.Smolec R.Sodor A.Szabo R.Christensen-Dalsgaard J.,Jenkins J.M.Kjeldsen H.Ricker G.R.Vanderspek R.2021-09-17T07:56:58Z2021-05-28T14:58:22ZCDS support team

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

cds-question@unistra.frvariable-starsphotometryvisible-astronomyWe present the first analysis of Cepheid stars observed by the TESS space mission in Sectors 1-5. Our sample consists of 25 pulsators: ten fundamental mode, three overtone and two double-mode classical Cepheids, plus three type II and seven anomalous Cepheids. The targets were chosen from fields with different stellar densities, both from the Galactic field and from the Magellanic System. Three targets have 2 minutes cadence light curves available by the TESS Science Processing Operations Center: for the rest, we prepared custom light curves from the full-frame images with our own differential photometric FITSH pipeline. Our main goal was to explore the potential and the limitations of TESS concerning the various subtypes of Cepheids. We detected many low-amplitude features: weak modulation, period jitter, and timing variations due to light-time effect. We also report signs of nonradial modes and the first discovery of such a mode in an anomalous Cepheid, the overtone star XZ Cet, which we then confirmed with ground-based multicolor photometric measurements. We prepared a custom photometric solution to minimize saturation effects in the bright fundamental-mode classical Cepheid, {beta} Dor with the lightkurve software, and we revealed strong evidence of cycle-to-cycle variations in the star. In several cases, however, fluctuations in the pulsation could not be distinguished from instrumental effects, such as contamination from nearby sources, which also varies between sectors.2021ApJS..253...11Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/253/11CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)J/AJ/108/222 : Pop. II variable stars (Nemec+, 1994)J/A+A/312/111 : [Fe/H] from RR Lyrae light curves (Jurcsik+, 1996)J/A+A/381/32 : Galactic Cepheid abundances (Andrievsky+, 2002)J/A+A/442/381 : Precise positions of RR Lyrae with Vmax>12.5 (Maintz, 2005)J/A+A/453/309 : HARPS observations of nine galactic Cepheids (Nardetto+, 2006)J/A+A/461/613 : The anomalous Cepheid XZ Ceti (Szabados+, 2007)J/ApJ/683/433 : Polaris monitoring (Bruntt+, 2008)J/AcA/58/163 : VI light curves of LMC classical Cepheids (Soszynski+, 2008)J/AcA/58/293 : Type-II and anomalous Cepheids in LMC (Soszynski+, 2008)J/ApJ/715/277 : Insights into the Cepheid distance scale (Bono+, 2010)J/AcA/60/91 : VI light curves of SMC type II Cepheids (Soszynski+, 2010)J/MNRAS/413/2709 : BVRI light curves of KIC Cepheids (Szabo+, 2011)J/MNRAS/436/953 : OGLE-LMC-CEP-0227 RV and VI[3.6] curves (Pilecki+, 2013)J/MNRAS/437/2307 : LMC anomalous Cepheid Ks light curves (Ripepi+, 2014)J/A+A/566/L10 : Cepheid radial velocity amplitude modulations (Anderson, 2014)J/PASP/126/521 : UBVRIJHK photometry of RR Lyrae in M4 (Stetson+, 2014)J/PASP/126/616 : Variable stars in Leo I dSph (Stetson+, 2014)J/AcA/64/177 : VI light curves of Galactic Bulge RR Lyrae (Soszynski+, 2014)J/MNRAS/446/4008 : RT Aur and SZ tau UBV light curves (Evans+, 2015)J/AJ/150/13 : Cepheid Radial Velocities (CRaV) project (Evans+, 2015)J/ApJS/219/25 : LCs of RR Lyrae stars in M3 (NGC5272) (Jurcsik+, 2015)J/AcA/65/233 : OGLE Magellanic Clouds anomalous Cepheids (Soszynski+, 2015)J/MNRAS/453/2022 : Double-mode radial-non-radial RR Lyrae stars (Netzel+, 2015)J/AcA/65/297 : OGLE4 LMC and SMC Cepheids (Soszynski+, 2015)J/MNRAS/455/4231 : Coralie radial velocities for l Car (Anderson+, 2016)J/MNRAS/463/1707 : l Car radial velocity curves (Anderson, 2016)J/A+A/603/A70 : Type II & anomalous Cepheids luminosities (Groenewegen+, 2017)J/A+A/605/A79 : TGAS Cepheids and RR Lyrae stars (Gaia Collaboration+, 2017)J/AcA/67/297 : OGLE Galactic center Cepheids and RR Lyrae (Soszynski+, 2017)J/ApJ/850/137 : ISLAndS project. III. Variable stars (Martinez-Vazquez+, 2017)J/AcA/68/89 : VI light curves of MC type II Cepheids (Soszynski+, 2018)J/A+A/619/A8 : Cepheid period-luminosity-metallicities (Groenewegen, 2018)J/ApJ/868/30 : OGLE LMC-T2CEP-211 eclipsing binary LCs & RVs (Pilecki+, 2018)J/AcA/68/315 : OGLE Galactic Cepheids (Udalski+, 2018)J/A+A/623/A116 : Gal. Cepheids & RR Lyrae multiplicity. I. (Kervella+, 2019)J/A+A/623/A146 : Radial Velocity & BIS measurements of Polaris (Anderson, 2019)J/A+A/625/A14 : Reclassification of Cepheids in the Gaia DR2 (Ripepi+, 2019)J/ApJS/244/32 : Extended Aperture Photometry of K2 RR Lyrae (Plachy+, 2019)http://archive.stsci.edu/missions-and-data/tess : TESS data on MASThttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/253/11https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/253/11http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/253/11https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/253/11https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/253/11http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/253/11GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/253/11/table1 (Targets)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/253/11/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/253/11/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/253/11/table1?GETtext/xml+votable180.050000true83.40630968-62.489771250.0055555555555555566/32881 32889 32926 32950 32971 33075 33084 33105 33107 33123 33306 33315 33328 33384 33470 33804 36535 36705 37410-37411 46271 46302 46306 46804 468242.0295717354549139e-19 2.9552336544269426e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/253/11?format=asciiOpticaldefaultJ/ApJS/253/11/table1TargetsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTypeSource type (1)src.classcharn_NameNote on Name (2)meta.notecharNpNumber of photometric measurements for this star (link to Table8)meta.numberintnullableNameMain name of the sourcemeta.id;meta.maincharprimaryONameOther namemeta.idcharTIC[9846652/2027094382] TIC numbermeta.idlongRA_ICRSGaia barycentric right ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainDE_ICRSGaia Barycentric declination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainRPmag[3.26/16.971] Gaia RP-band magnitudemagphot.mag;em.opt.Rfloatn_RPmagNote on RPmag (3)meta.notecharSectorTESS sector(s)obs.fieldcharGaiaDisplay the Gaia DR2 data (I/345) within 0.5"meta.ref.urlcharLCInteractive LC plotmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RA.icrsRight ascension (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexedJ/ApJS/253/11/table8*The FITSH photometry prepared for 23 full-frame image target stars analysedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameIdentifiermeta.id;meta.maincharBJDBarycentric Julian Datedtime.epochdoubleindexedTmag[10.5/17.4] TESS apparent magnitudemagphot.mag;em.optdoublee_Tmag[0.00029/0.8] Uncertainty in Tmagmagstat.error;phot.magdoubleFlux[19/9961] Tess flux in electrons/se.s**-1phot.flux.density;em.optdoublee_Flux[0.37/214] Uncertainty in Fluxe.s**-1stat.error;phot.fluxdoubleJ/ApJS/253/11/table9The 2-minute cadence custom aperture photometry prepared for {Beta} DorBJDBarycentric Julian Datedtime.epochdoubleindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTmag[2.8/3.3] TESS apparent magnitudemagphot.mag;em.optdoublee_Tmag[0/4.1e-5] Uncertainty in Tmagmagstat.error;phot.magdoubleFlux[7958716/11898840] Tess flux in electrons/se.s**-1phot.flux.density;em.optinte_Flux[297/371] Uncertainty in Fluxe.s**-1stat.error;phot.fluxdouble