Long-term monitoring of Dor stars

gamma 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. A selected group of gamma 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. 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.

伽马多普勒星由于其重力模式能够探测到深层的恒星内部结构，因而成为 asteroseismology（ asteroseismology）的理想研究目标。对这些恒星模式的识别将极大地提升我们对这些恒星的认知。一组精选的伽马多普勒星及一些候选星通过 Mercator 望远镜进行了观测，旨在发现和/或确认光变周期的规律性，并推导出不同通带中的可靠振幅比。在日内瓦光度系统下获得的所有新数据均进行了频率分析。为了获得更可靠和精确的频率，新数据与文献中的相似数据和 Hipparcos 观测数据相结合。在允许均值和振幅在不同观测集之间变化的同时，搜索一组最小化谐波拟合残差的频率。