标题： 两站CCD观测与HD 207331的光谱学：天鹅座中的新$δ$盾牌座δ型变星 显示英文标题

标题： Two-site CCD observations and spectroscopy of HD 207331: a new $δ$ Scuti variable in Cygnus

摘要： 报告了一项关于新发现的 $\delta$ Scuti变星 \astrobj{HD~207331} 的观测活动结果。 这颗恒星于2009年8月26日至9月2日从墨西哥圣佩德罗马蒂尔天文台（0.84米望远镜）和西班牙泰德天文台（0.80米望远镜）进行了光电观测。 从两个地点共收集到53.8小时的有效数据。 在置信度超过99％的情况下，发现了 \astrobj{HD~207331} 的四个振荡频率。 这些结果证实了先前稀疏数据观测所提示的该恒星多周期脉动性质。 2009年的光谱观测使我们能够推导出其光谱类型和光度等级，并估算其自转速度。 还进行了与模型的简单比较。 显示英文摘要

摘要： The results of an observational campaign on the new $\delta$ Scuti pulsator \astrobj{HD~207331} are reported. The star was observed photometrically from August 26 to September 2, 2009 from the Observatorio San Pedro M\'artir (0.84-m telescope, Mexico) and the Observatorio del Teide (0.80-m telescope, Spain). An overall run of 53.8 h of useful data was collected from the two sites. Four oscillation frequencies for \astrobj{HD~207331} have been found above a 99\% confidence level. These results confirm the multiperiodic pulsation nature of the star suggested in previous observations with sparse data. Spectroscopic observations carried out in 2009 allowed us to derive its spectral type and luminosity class as well as to estimate its rotation rate. A simple comparison with models is performed.