Ref: ASTROimport-488

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

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.

published in Astronomy and Astrophysics, 499, pp. 967-982 (2009)

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. Based on observations collected with the Flemish 1.2-m Mercator Telescope at Roque de los Muchachos, La Palma. Tables 5 to 25 are also available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr ( or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/499/967

DOI: 10.1051/0004-6361/200911691
Links: link

The record appears in these collections:
Royal Observatory of Belgium > Astronomy & Astrophysics
Science Articles > Peer Reviewed Articles

 Record created 2016-07-01, last modified 2016-07-01