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首页> 外文期刊>Publications of the Astronomical Society of the Pacific >Self-correlation analysis of the photometric variability of T Tauri stars. II. A survey
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Self-correlation analysis of the photometric variability of T Tauri stars. II. A survey

机译：T Tauri星光度变异性的自相关分析。二。一项调查

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摘要

We have used archival CCD data, Fourier analysis, and self-correlation analysis to study the photometric time variability of 162 T Tauri stars and related objects, including Herbig Ae/Be stars. Many show periodic variability, presumably due to rotation of a spotted star in most cases. For the nonperiodic stars, we have estimated an upper limit to the periodic variability. We have also analyzed 26 stars suspected to have periods longer than about 10 days. Of these 26 stars, at least 14 have periods significantly longer than 10 days; their variability may be due to processes in the disk, or the effect of a companion, since most (but not all) T Tauri stars have rotational periods less than this value. For a few of the rotational variables, namely AATau, DK Tau, DLTau, DN Tau, GK Tau, GM Aur, Rox 29, V1121 Oph, V410 Tau, and V649 Ori, we have found long-term variability of the amplitude, presumably due to activity cycles; the time scales are 1500-4000 days.
机译：我们已使用档案CCD数据，傅里叶分析和自相关分析来研究162 T Tauri恒星和相关物体（包括Herbig Ae / Be恒星）的光度时变。许多情况下表现出周期性的变化，大概是由于在大多数情况下斑点恒星的旋转。对于非周期性恒星，我们估计了周期性变化的上限。我们还分析了26个被怀疑周期超过10天的恒星。在这26颗恒星中，至少有14颗的周期明显超过10天;它们的可变性可能是由于盘中的过程或伴星的影响所致，因为大多数（但不是全部）T Tauri星的旋转周期小于该值。对于一些旋转变量，即AATau，DK Tau，DLTau，DN Tau，GK Tau，GM Aur，Rox 29，V1121 Oph，V410 Tau和V649 Ori，我们发现了振幅的长期可变性，大概是由于活动周期;时间范围是1500-4000天。

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