论文标题
风线变异性和观察质量损失率的内在错误
Wind line variability and intrinsic errors in observational mass loss rates
论文作者
论文摘要
OB恒星中的紫外风线变异性似乎是通用的。我们回顾了可变性是由于植根于光球或附近的大型，致密，光学厚的结构引起的。使用重复的BSertation和一个简单的模型，我们将观察到的轮廓变化转化为光学深度变化，从而将测得的质量损失率变化。尽管全球利率可能是稳定的，但测量率有所不同。因此，轮廓变化推断了从紫外风线确定的质量损失率如何变化。这些变化量化了从单个观察结果得出的任何质量损失率固有的固有误差。这些派生的速率可能因3或以上的因素而有所不同。我们的结果还意味着，非同时观察的比率（例如紫外线和基于地面的数据）不一定。最后，我们使用结果来检查负责变异性的结构的性质。
UV wind line variability in OB stars appears to be universal. We review the evidence that the variability is due to large, dense, optically thick structures rooted in or near the photosphere. Using repeated bservations and a simple model we translate observed profile variations into optical depth variations and, consequently, variations in measured mass loss rates. Although global rates may be stable, measured rates vary. Consequently, profile variations infer how mass loss rates determined from UV wind lines vary. These variations quantify the intrinsic error inherent in any mass loss rate derived from a single observation. These derived rates can differ by factors of 3 or more. Our results also imply that rates from non-simultaneous observations (such as UV and ground based data) need not agree. Finally, we use our results to examine the nature of the structures responsible for the variability.
