标题： 一颗天琴β型星Theta Ophiuchi的恒星地震学研究：光度结果 显示英文标题

标题： An asteroseismic study of the Beta Cephei star Theta Ophiuchi: photometric results

摘要： 我们于2003年4月至8月期间开展了针对天鹰座Beta型变星Theta Ophiuchi的三项站点测光观测活动。 在77个晴朗夜晚，共获得了245小时的微分光电uvy测光数据。 我们测量数据的频率分析表明，在7.116到7.973次/日的狭窄频率范围内检测到了七种脉动模式。 未发现组合频率或谐波频率。 通过我们的颜色测光数据分析了各个脉动模式的属性，结果显示存在一个径向模式、一个旋转分裂的l=1三重态以及可能存在的l=2五重态的三个分量。 我们讨论了研究结果的意义，并指出Theta Ophiuchi的脉动光谱与另一颗Beta Cephei星V836 Cen的相似性。 显示英文摘要

摘要： We have carried out a three-site photometric campaign for the Beta Cephei star Theta Ophiuchi from April to August 2003. 245 hours of differential photoelectric uvy photometry were obtained during 77 clear nights. The frequency analysis of our measurements resulted in the detection of seven pulsation modes within a narrow frequency interval between 7.116 and 7.973 c/d. No combination or harmonic frequencies were found. We performed a mode identification of the individual pulsations from our colour photometry that shows the presence of one radial mode, one rotationally split l=1 triplet and possibly three components of a rotationally split l=2 quintuplet. We discuss the implications of our findings and point out the similarity of the pulsation spectrum of Theta Ophiuchi to that of another Beta Cephei star, V836 Cen.