J/AJ/170/15ivo://CDS.VizieR/J/AJ/170/15doi:10.26093/cds/vizier/be-5a-fCDSHattori S.Angus R.Foreman-Mackey D.Lu Y.(.Colman I.2026-07-02T11:52:32Z2026-03-25T14:27:13ZCDS support team

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

cds-question@unistra.frphotometryvisible-astronomydwarf-starsk-starsThe rotation period of a star is an important quantity that provides insight into its structure and state. For stars with surface features like starspots, their periods can be inferred from brightness variations as these features move across the stellar surface. TESS, with its all-sky coverage, is providing the largest sample of stars for obtaining rotation periods. However, most of the periods have been limited to shorter than the 13.7days TESS orbital period due to strong background signals (e.g., scattered light) on those timescales. In this study, we investigated the viability of measuring longer periods (>10days) from TESS light curves for stars in the Northern Continuous Viewing Zone (NCVZ). We first created a reference set of 272 period measurements longer than 10 days for K and M dwarfs in the NCVZ using data from the Zwicky Transient Facility (ZTF) that we consider as the "ground truth" given ZTF's long temporal baseline of 6+years. We then used the unpopular pipeline to detrend TESS light curves and implemented a modified Lomb-Scargle (LS) periodogram that accounts for flux offsets between observing sectors. For 179 out of the 272 sources (66%), the TESS-derived periods match the ZTF-derived periods to within 10%. The match rate increases to 81% (137 out of 170) when restricting to sources with a TESS LS power that exceeds a threshold. Our results confirm the capability of measuring periods longer than 10days from TESS data, highlighting the data set's potential for studying slow rotators.2025AJ....170...15Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/170/15CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIV/34 : K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017)IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)IV/39 : TESS Input Catalog version 8.2 (TIC v8.2) (Paegert+, 2021)I/345 : Gaia DR2 (Gaia Collaboration, 2018)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)I/357 : Gaia DR3 Part 3. Non-single stars (Gaia Collaboration, 2022)J/A+A/275/101 : Chemical evolution of the galactic disk I. (Edvardsson+ 1993)J/A+A/530/A138 : Geneva-Copenhagen survey re-analysis (Casagrande+, 2011)J/ApJ/743/48 : Stars with rotation periods & X-ray luminosities (Wright+, 2011)J/ApJS/211/24 : Rotation periods of Kepler MS stars (McQuillan+, 2014)J/MNRAS/472/1618 : Kepler study of starspot lifetimes (Giles+, 2017)J/AJ/155/180 : A catalog of cool dwarf targets for the TESS (Muirhead+, 2018)J/AJ/156/102 : The TESS Input Catalog & Candidate Target List (Stassun+, 2018)J/ApJS/244/21 : Surface rotation & activity of Kepler stars. I. (Santos+, 2019)J/ApJS/250/20 : Rot. periods in TESS objects of interest (TOIs) (Canto+, 2020)J/ApJS/249/18 : The ZTF catalog of periodic variable stars (Chen+, 2020)J/ApJ/903/99 : Stellar spins in the open cluster NGC 2516 (Healy+, 2020)J/ApJS/255/17 : Surface rot. & activity for Kepler stars. II. (Santos+, 2021)J/AJ/164/137 : Untangling the Gal. IV. ~100000 stars with TESS (Kounkel+, 2022)J/AJ/164/251 : ZTF measured rot. period of 40553 M- or G-dwarfs (Lu+, 2022)J/ApJS/268/4 : Stellar variab. with TESS 2min cadence phot. (Fetherolf+, 2023)J/AJ/167/189 : Rotation period for 10909 TESS targets (Colman+, 2024)http://irsa.ipac.caltech.edu/Missions/ztf.html : ZTF archivehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/170/15https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/170/15http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/170/15https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/170/15https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/170/15http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/170/15GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/170/15/table1 (ZTF and TESS periods for the 272 sources in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/170/15/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/170/15/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/170/15/table1?GETtext/xml+votable180.050000true269.14637365293654.74669758345150.0055555555555555565/2525 2548 2555 2559 2943 3837 4010 4021-4022 6/10069 10077-10079 10094-10095 10097 10104-10105 10109 10111 10167 10175 10181 10183 10185 10196-10198 10203-10204 10209 10211-10212 10214 10218 10224 10228 10230 10233-10234 11542-11543 11547 11549 11551 11571 11573 11581 11583-11584 11587 11589-11590 11592 11596 11601-11602 11604 11615 11618 11622 11629 11634-11636 11638-11640 11643 11645 11665 11668 11673 11676 11700 11708-11709 11711 11722 11725-11729 11731 11733-11734 11738-11739 11748 11750 11752 11754 11758-11759 11762 11765-11766 12101 12114-12115 15231 15275 15278 15284 15286-15287 15289-15290 15293 15295 15304-15306 15309 15311 15317 15319 15330 15332 15336-15338 15343 15345 15347 15352-15353 15355 15357 15910 15912 15919 15928-15929 15935 15975-15976 15978 15981-15982 16003 16006-16009 16012-16013 16015-16017 16021-16022 16030 16033-16034 16036 16044-16045 16047 16049-16051 16053 16059 16062 16067-16068 16071 16074-16075 16078 16081 16092-16093 16097 16100 16102 16106 16110 16116 16120 16126 16267 16288 16290-16291 16296 162981.9676113589029636e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/170/15?format=asciiOpticaldefaultJ/AJ/170/15/table1ZTF and TESS periods for the 272 sources in this workrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTIC[160551437/462637035] TESS Input Catalog (IV/39) identifiermeta.id;meta.mainlongindexedGaiaDR2Gaia DR2 (I/345) source identifiermeta.idindexedRAG2degGaia DR2 (I/345) right ascension (J2000); used in TESS Input Catalog (IV/39)degpos.eq.raDEG2degGaia DR2 (I/345) declination (J2000); used in TESS Input Catalog (IV/39)degpos.eq.decRA_ICRSGaia DR3 (I/355) right ascension (ICRS) at at Ep=2016.0degpos.eq.ra;meta.mainDE_ICRSGaia DR3 (I/355) declination (ICRS) at Ep=2016.0degpos.eq.dec;meta.mainTmag[11.9/15] TESS magnitudemagphot.mag;em.optfloate_Tmag[6e-3/0.02] TESS magnitude errormagstat.error;phot.mag;em.optdoubleGmag[13/16] Gaia G-band mean magnitudemagphot.mag;em.optdoubleTeff[2899/5278] Effective temperature from TESS Input Catalog (IV/39)Kphys.temperature.effectivefloate_Teff[121.1/158.4] Teff errorKstat.error;phys.temperature.effectivefloatProt-ZTF-r[10/99.6] ZTF r-band rotation perioddtime.perioddoubleProt-TESS[0.5/97.1] TESS rotation perioddtime.perioddoubleCatGaiaDR3Display the Gaia DR3 (I/355) data for sources within 1"meta.ref.urlintnullableSimbadNameSimbad column added by the CDSmeta.idcharnullable