J/MNRAS/441/3543ivo://CDS.VizieR/J/MNRAS/441/3543doi:10.26093/cds/vizier.74413543CDSBalona L.A.2024-08-09T20:15:10Z2015-06-23T15:41:25ZCDS support team

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

cds-question@unistra.fra-starsmultiple-starssolar-system-planetsKepler photometry of A stars shows that a considerable fraction (about 19 per cent) have a peculiar feature in the periodogram. This feature consists of a broad peak, thought to be due to differential rotation in a spotted star, and a sharp peak at slightly higher frequency. The pattern clearly involves some widespread stellar property and the sharp peak implies a strictly coherent periodicity. We investigate the possibility that the periodicity is due to rotation, pulsation or an orbital effect. We argue that neither rotation nor pulsation can provide a suitable, testable, explanation. We suggest that the sharp feature could be due to a planet in synchronous orbit around the rapidly rotating, spotted A star, not necessarily in transit. Spectroscopic observations of sufficient precision are required to falsify this hypothesis.2014MNRAS.441.3543Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/441/3543CatalogResearchIsServedByTAP 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/MNRAS/441/3543https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/441/3543http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/441/3543https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/441/3543https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/441/3543http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/441/3543GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/441/3543/table1 (List of A stars in which the characteristic frequency pattern has been detected)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/441/3543/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/441/3543/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/441/3543/table1?GETtext/xml+votable180.050000true292.5874637.31726110.0055555555555555565/3683 3688-3689 3780 3784 6/14579 14583-14584 14586-14589 14591 14730-14731 14744 14746 14750-14751 14760-14762 14764-14765 14768-14770 14772 14775-14776 14779-14781 14783 14792 14794 14816-14818 14824-14826 14918 14926 14930-14932 14935 14937-14938 14942 14948 14950 14962 14966-14967 15105 15107 15109-15110 15115 15118-15119 15124 15126 15128-15130 15132 15135 15141 15143 15150 15156 15168 15171-15172 15200https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/441/3543?format=asciidefaultJ/MNRAS/441/3543/table1List of A stars in which the characteristic frequency pattern has been detectedKICKIC identification numbermeta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)pos.eq.raDEJ2000Declination (J2000)pos.eq.deckepmag[7.5/51.3] Kepler magnitudemagphot.mag;em.optfloatlogTe[3.8/4.1] Effective temperature derived from KIClog(K)phys.temperature.effectivefloatlogL[0.8/2.4]? Luminosity derived from KIClog(solLum)phys.luminosityfloatnullablenurot[0.1/3] Presumed rotational frequency peakd**-1em.freq;src.varfloatAmp[0/4] Amplitude of variationmmagarith.rate;phot.magfloatS/N[4.5/114] Signal-to-noise ratio (1)stat.snrfloatNote[D] D indicates a {delta} Scuti starmeta.notecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from KIC (Cat. V/133) catalog (right ascension part)degpos.eq.ra;meta.main_DEPositions from KIC (Cat. V/133) catalog (declination part)degpos.eq.dec;meta.main