船底座VLT/VIMOS场中变星的深度普查
Deep census of variable stars in a VLT/VIMOS field in Carina
摘要：
我们在船底座朝向银道面的深V波段图像中寻找变星。这些图像是在2005年4月的4个连续的夜晚在ESO VLT用VIMOS仪器拍摄的。我们检测到348个变量之间的50897颗恒星的星等范围V=15.4和V=24.5马格。检测后，我们分类的变量直接眼睛检查他们的光变曲线。除了9颗OGLE凌日外，所有的变星都是新发现的。我们提供了所有变星的完整目录，包括食/椭球双星，杂项变星（主要是盾牌座变星），有耀斑的恒星和其他（不规则和可能的长周期）变星。在我们的样本中，只有两颗恒星是已知的行星。我们的研究结果对未来的大变率观测具有一定的指导意义。
英文摘要：
We have searched for variable stars in deep V-band images of a field towards the Galactic plane in Carina. The images were taken with VIMOS instrument at ESO VLT during 4 contiguous nights in April 2005. We detected 348 variables among 50897 stars in the magnitude range between V=15.4 and V=24.5 mag. Upon detection, we classified the variables by direct eye inspection of their light curves. All variable objects but 9 OGLE transits in the field are new discoveries. We provide a complete catalog of all variables which includes eclipsing/ellipsoidal binaries, miscellaneous pulsators (mostly delta Scuti-type variables), stars with flares and other (irregular and likely long-period) variables. Only two of the stars in our sample are known to host planets. Our result give some implications for future large variability surveys.
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