We obtained high-resolution spectroscopic observations of 34 γ Doradus candidates. From the red-wavelength spectra, we determined spectral classes, radial velocities, and projected rotational velocities. The spectra of seven late A or early F stars show metallic lines that have composite profiles consisting of a narrow component near the center of a broad line, indicating that they may be shell stars or binaries. Several stars, including HD 152896, HD 173977, HD 175337, and HD 195068/9, show large line profile asymmetries. Two stars, HD 11443 (=α Trianguli) and HD 149420, are ellipsoidal variables and not γ Doradus stars. The percentage of binary systems in our sample may be as high as 74%.
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机译：我们获得了34个γDoradus候选物的高分辨率光谱观察。从红色波长光谱中，我们确定了光谱类别，径向速度和投影的旋转速度。七个A晚期或F早期恒星的光谱显示出金属线，这些金属线具有由宽线中心附近的狭窄成分组成的复合轮廓，表明它们可能是壳星或双星。 HD 152896，HD 173977，HD 175337和HD 195068/9等几颗星星显示出较大的线轮廓不对称性。 HD 11443（=αTrianguli）和HD 149420两颗恒星是椭球变量，而不是γDoradus恒星。我们的样本中的二元系统百分比可能高达74％。
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