J/A+A/526/L10ivo://CDS.VizieR/J/A+A/526/L10doi:10.26093/cds/vizier.35269010CDSHerrero E.Morales J.C.Ribas I.Naves R.2017-06-22T14:28:29Z2011-01-17T12:26:56ZCDS support team

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

cds-question@unistra.frvariable-starssolar-system-planetsphotometryWe report the discovery of photometric oscillations in the host star of the exoplanet WASP-33b (HD 15082). The data were obtained in the R band in both transit and out-of-transit phases from the 0.3-m telescope and the Montcabrer Observatory and the 0.8-m telescope at the Montsec Astronomical Observatory. Proper fitting and subsequent removal of the transit signal reveals stellar photometric variations with a semi-amplitude of about 1mmag. The detailed analysis of the periodogram yields a structure of significant signals around a frequency of 21 cyc per day, which is typical of delta Scuti-type variable stars. An accurate study of the power spectrum reveals a possible commensurability with the planet orbital motion with a factor of 26, but this remains to be confirmed with additional time-series data that will permit the identification of the significant frequencies. These findings make WASP-33 the first transiting exoplanet host star with delta Scutt variability and a very interesting candidate to search for star-planet interactions.2011A&A...526L..10Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/526/L10CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/526/L10https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/526/L10http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/526/L10https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/526/L10https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/526/L10http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/526/L10GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/526/L10/photoTransit data }recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate of observationtime.epochnullableHJDHeliocentric Julian Datedtime.epochdoubleDRmagDifferential magnitude on R-bandmagphot.mag;em.opt.R;arith.diffdoublee_DRmagDifferential magnitude errormagstat.error;phot.magfloat