Title: Long-term photometric monitoring with the Mercator telescope. Frequencies and multicolour amplitudes of gamma Doradus stars
Authors: Cuypers, J ×
Aerts, Conny
De Cat, P
De Ridder, Joris
Goossens, K
Schoenaers, C
Uytterhoeven, K
Acke, Bram
Davignon, G
Debosscher, Jonas
Decin, Leen
De Meester, Wim
Deroo, P
Drummond, R
Kolenberg, Katrien
Lefever, K
Raskin, Gert
Reyniers, M
Saesen, Sophie
Vandenbussche, Bart
Van Malderen, R
Verhoelst, Tijl
Van Winckel, Hans
Waelkens, Christoffel #
Issue Date: Jun-2009
Publisher: Edp sciences s a
Series Title: Astronomy & astrophysics vol:499 issue:3 pages:967-982
Abstract: 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.
ISSN: 0004-6361
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Institute of Astronomy
Physics and Astronomy - miscellaneous
× corresponding author
# (joint) last author

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