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Long-term photometric monitoring with the Mercator telescope Frequencies and multicolour amplitudes of γ Doradus stars

dc.contributor.authorCuypers, J.
dc.contributor.authorAerts, C.
dc.contributor.authorDe Cat, P.
dc.contributor.authorDe Ridder, J.
dc.contributor.authorGoossens, K.
dc.contributor.authorSchoenaers, C.
dc.contributor.authorUytterhoeven, K.
dc.contributor.authorAcke, B.
dc.contributor.authorDavignon, G.
dc.contributor.authorDebosscher, J.
dc.contributor.authorDecin, L.
dc.contributor.authorDe Meester, W.
dc.contributor.authorDeroo, P.
dc.contributor.authorDrummond, R.
dc.contributor.authorKolenberg, K.
dc.contributor.authorLefever, K.
dc.contributor.authorRaskin, G.
dc.contributor.authorReyniers, M.
dc.contributor.authorSaesen, S.
dc.contributor.authorVandenbussche, B.
dc.contributor.authorVan Malderen, R.
dc.contributor.authorVerhoelst, T.
dc.contributor.authorVan Winckel, H.
dc.contributor.authorWaelkens, C.
dc.date2009
dc.date.accessioned2016-04-05T11:22:54Z
dc.date.available2016-04-05T11:22:54Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/3254
dc.descriptionContext. γ Dor stars are excellent targets for asteroseismology since the gravity modes present in these stars probe the deep stellar interiors. Mode identification will improve the knowledge of these stars considerably. Aims. A selected group of γ Dor stars and some candidates were observed with the Mercator telescope to find and/or confirm the periodicities in the light variations and to derive reliable amplitude ratios in different pass bands. Methods. A frequency analysis was performed on all new data obtained in the Geneva photometric system. In order to have more reliable and accurate frequencies, the new data were combined with similar data from the literature and with Hipparcos observations. A set of frequencies that minimized the residuals in a harmonic fit was searched for while allowing means and amplitudes to vary from one observation set to another. Results. Frequencies and amplitudes in the photometric passbands of the Geneva system are given for 21 γ Dor stars. We report the discovery of HD 74504 as a newly found γ Dor star. Conclusions. Our study provides the first extensive multicolour database for the understanding of gravity modes in F-type stars. © ESO 2009.
dc.languageeng
dc.titleLong-term photometric monitoring with the Mercator telescope Frequencies and multicolour amplitudes of γ Doradus stars
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeAmplitude ratios
dc.subject.freeAsteroseismology
dc.subject.freeFrequency Analysis
dc.subject.freeGravity modes
dc.subject.freeHIPPARCOS
dc.subject.freeMode identification
dc.subject.freePassbands
dc.subject.freePhotometric monitoring
dc.subject.freePhotometric systems
dc.subject.freeStars: oscillations
dc.subject.freeStars: variables: general
dc.subject.freeStellar interior
dc.subject.freeTechniques: photometric
dc.subject.freeGravitational effects
dc.subject.freeOptical instruments
dc.subject.freeOptical telescopes
dc.subject.freePhotometry
dc.subject.freeTelescopes
dc.subject.freeStars
dc.source.titleAstronomy and Astrophysics
dc.source.volume499
dc.source.issue3
dc.source.page967-982
Orfeo.peerreviewedYes
dc.identifier.doi10.1051/0004-6361/200911691
dc.identifier.scopus2-s2.0-66949132457


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