J/A+A/693/A63ivo://CDS.VizieR/J/A+A/693/A63doi:10.26093/cds/vizier.36930063CDSWang X.Zong W.Ma X.-Y.Charpinet C.Wu T.Wang H.2025-03-03T20:01:46Z2025-01-03T15:05:20ZCDS support team

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

cds-question@unistra.frvariable-starsasteroseismologyvisible-astronomyAs mixed with real pulsations, the reflection of super-Nyquist frequencies (SNFs) pose a threat to asteroseismic properties. Although SNFs have been studied in several pulsating stars, a systematic survey remains scarcely to be explored. Here we propose a method to identify SNFs from Kepler and TESS photometry by characterizing their periodic frequency modulations using a sliding Fourier transform. After analyzing long cadence photometry in the Kepler legacy, we have identified 304 SNFs in 56 stars from 45607 frequencies in ~600 {gamma} Doradus stars, corresponding to a fraction of approximately 0.67% and 9.2%, respectively. Most SNFs are detected in the frequency range of pressure mode over 120{mu}Hz and the fraction of SNF detection increases as frequency up to ~7%. We barely found two potential SNFs mixed with gravity modes in two {gamma} Doradus stars. These findings indicate that SNFs have a negligible impact on global seismic properties, such as those derived from period spacing in {gamma} Doradus stars. However, we stress that SNFs must be carefully and systematically examined by this method in other pulsating stars, particularly {delta} Scuti and hot B subdwarf stars, to establish a solid foundation for precise asteroseismolgy of various types of pulsators.2025A&A...693A..63Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/693/A63CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/693/A63https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/693/A63http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/693/A63https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/693/A63https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/693/A63http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/693/A63GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/693/A63/table2 (All 304 identified SNFs in 56 gamma Dor stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/693/A63/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/693/A63/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/693/A63/table2?GETtext/xml+votable180.050000true291.947542837.11340780.0055555555555555566/14577-14578 14581 14583 14588 14730-14731 14733 14735 14746 14750-14754 14756 14768 14770-14771 14774 14779 14782 14792 14794 14816 14928 14932-14933 14941-14942 14964 14975 15104 15110 15118 15121-15122 15128 15137 15168 15172 15174https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/693/A63?format=asciiOpticaldefaultJ/A+A/693/A63/table2All 304 identified SNFs in 56 gamma Dor starsfdetectSuper-Nyquist frequencyuHzem.freqdoublee_fdetectSuper-Nyquist frequency erroruHzstat.errordoubleAmpAmplitude of the super-Nyquist frequency(10-6)src.var.amplitudefloate_AmpAmplitude error of the super-Nyquist frequency(10-6)stat.errorfloatfrealReal frequency corresponding to the super-Nyquist frequencyuHzem.freqdoubleSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKIC identifiermeta.id;meta.mainint