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

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    Authors
    Cuypers, J.
    Aerts, C.
    De Cat, P.
    De Ridder, J.
    Goossens, K.
    Schoenaers, C.
    Uytterhoeven, K.
    Acke, B.
    Davignon, G.
    Debosscher, J.
    Decin, L.
    De Meester, W.
    Deroo, P.
    Drummond, R.
    Kolenberg, K.
    Lefever, K.
    Raskin, G.
    Reyniers, M.
    Saesen, S.
    Vandenbussche, B.
    Van Malderen, R.
    Verhoelst, T.
    Van Winckel, H.
    Waelkens, C.
    Show allShow less
    Discipline
    Physical sciences
    Subject
    Amplitude ratios
    Asteroseismology
    Frequency Analysis
    Gravity modes
    HIPPARCOS
    Mode identification
    Passbands
    Photometric monitoring
    Photometric systems
    Stars: oscillations
    Stars: variables: general
    Stellar interior
    Techniques: photometric
    Gravitational effects
    Optical instruments
    Optical telescopes
    Photometry
    Telescopes
    Stars
    Audience
    Scientific
    Date
    2009
    Metadata
    Show full item record
    Description
    Context. 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.
    Citation
    Cuypers, J.; Aerts, C.; De Cat, P.; De Ridder, J.; Goossens, K.; Schoenaers, C.; Uytterhoeven, K.; Acke, B.; Davignon, G.; Debosscher, J.; Decin, L.; De Meester, W.; Deroo, P.; Drummond, R.; Kolenberg, K.; Lefever, K.; Raskin, G.; Reyniers, M.; Saesen, S.; Vandenbussche, B.; Van Malderen, R.; Verhoelst, T.; Van Winckel, H.; Waelkens, C. (2009). Long-term photometric monitoring with the Mercator telescope Frequencies and multicolour amplitudes of γ Doradus stars. , Astronomy and Astrophysics, Vol. 499, Issue 3, 967-982, DOI: 10.1051/0004-6361/200911691.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/3254
    doi: http://dx.doi.org/10.1051/0004-6361/200911691
    scopus: 2-s2.0-66949132457
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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