标题： 北部和南部（候选）γ杜拉达斯星的观测结果 显示英文标题

标题： Observational results for northern and southern (candidate) gamma Doradus stars

摘要： 我们报告了针对78个最初被分类为真正的或候选γ杜鹃星天体的观测结果。对于南半球的天体，我们在1998年至2003年使用安装在欧拉望远镜上的CORALIE光谱仪获取了光栅光谱，或者在1999年至2000年使用安装在0.5米SAAO望远镜上的MODULAR光电倍增管进行了Johnson-Cousins B、V、Ic波段观测。对于北半球的天体，我们在2001年至2004年使用安装在1.2米MERCATOR望远镜上的P7光电倍增管获得了Geneva U、B、B1、B2、V、V1、G波段观测数据。至少有15个我们的目标是双星系统，其中7个是新的发现。对于6个双星系统，我们首次确定了它们的轨道。至少有17个目标表现出谱线轮廓变化，至少有12个目标是多周期的光变星。我们的研究结果使得我们可以将11个目标提升为真正的γ杜鹃星，同时将8个目标降级为目前检测极限内的恒定亮度天体。模式识别仍在进行中，但到目前为止，只确认了l=1和2的模式。 显示英文摘要

摘要： We report on observational results obtained for 78 objects originally classified as bona-fide or candidate gamma Doradus stars. For the southern objects, we gathered echelle spectra with the CORALIE spectrograph attached to the Euler telescope in 1998-2003 and/or Johnson-Cousins B,V,Ic observations with the MODULAR photometer attached to the 0.5-m SAAO telescope in 1999-2000. For the northern objects, we obtained Geneva U,B,B1,B2,V,V1,G observations with the P7 photometer attached to the 1.2-m MERCATOR telescope in 2001-2004. At least 15 of our objects are binaries, of which 7 are new. For 6 binaries, we determined the orbit for the first time. At least 17 objects show profile variations and at least 12 objects are multiperiodic photometric variables. Our results allow us to upgrade 11 objects to bona-fide gamma Doradus stars and to downgrade 8 objects to constant up to the current detection limits. Mode identification is still ongoing, but so far, only l = 1 and 2 modes have been identified.