J/A+A/703/A102ivo://CDS.VizieR/J/A+A/703/A102doi:10.26093/cds/vizier/bc-nz/lbacCDSMathys G.Holdsworth D.L.Giarrusso M.Kurtz D.W.Catanzaro G.Leone F.2026-08-03T06:58:55Z2025-11-11T15:27:25ZCDS support team

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

cds-question@unistra.frap-starsmagnetic-fieldsvisible-astronomyThe rotation periods of Ap stars range over five to six orders of magnitude. The origin of their differentiation remains unknown. We carry out a systematic study of the longest period Ap stars to gain insight into their properties. We analyse newly obtained spectra of a sample of super-slowly rotating Ap (ssrAp) star candidates identified by a TESS photometric survey to confirm that their projected equatorial velocity v sin i is consistent with (very) long rotation periods, to obtain a first determination of their magnetic fields, and to test their binarity. The value of vsini in 16 of the 18 studied stars is low enough for them to have moderately to extremely long rotation periods. All stars but one are definitely magnetic; for five of them, the magnetic field was detected for the first time. Five new stars with resolved magnetically split lines were discovered. Five stars that were not previously known to be spectroscopic binaries show radial velocity variations; in one of them, lines from both components are observed.2025A&A...703A.102Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/703/A102CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/703/A102https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/703/A102http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/703/A102https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/703/A102https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/703/A102http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/703/A102GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/703/A102/stars (List of studied stars and spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/703/A102/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/703/A102/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/703/A102/stars?GETtext/xml+votable180.050000true233.615625-6.88786110.0055555555555555566/915 2818 2903 8037 13183 14202 14242 14301 20457 31264 37643 41712 41917 42133 42916 43058 43219https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/703/A102?format=asciiOpticaldefaultJ/A+A/703/A102/starsList of studied stars and spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (TIC NNNNNNNNN)meta.id;meta.maincharRAJ2000Simbad right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Simbad declination (J2000)pos.eq.dec;meta.mainspShow the spectrummeta.ref.urlcharFileNameName of the spectrum file in subdirectory spmeta.id;meta.filecharJDJulian date of observationdtime.epochdoubleInstInstrumentmeta.id;instrcharSimbadSimbad column added by the CDSmeta.ref.urlchar