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arXiv 0901.0202astro-ph.SR
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活动星RV和BVS模型

Modeling the RV and BVS of active stars

Cezary Migaszewski, Grzegorz Nowak

摘要:

我们提出了一种方法来模拟径向速度(RV)的测量,这可能是有用的,在寻找行星主办的色球活动的恒星。我们假设所观察到的RV信号是由恒星的反射运动以及由二等分线速度跨度(BVS)测量的谱线轮廓的失真引起的。RV与一个共同的行星模型,包括RV校正项线性依赖于BVS,这占恒星活动。相关系数是RV模型的附加自由参数。这种方法不同于在拟合“纯”行星模型之前或之后校正RV。我们测试的方法对单行星系统的模拟数据。结果进行了比较,在文献中发现的算法的结果。

英文摘要:

We present a method of modeling the radial velocity (RV) measurements which can be useful in searching for planets hosted by chromospherically active stars. We assume that the observed RV signal is induced by the reflex motion of a star as well as by distortions of spectral line profiles, measured by the Bisector Velocity Span (BVS). The RVs are fitted with a common planetary model including RV correction term depending linearly on the BVS, which accounts for the stellar activity. The coefficient of correlation is an additional free parameter of the RV model. That approach differs from correcting the RVs before or after fitting the "pure" planetary model. We test the method on simulated data derived for single-planet systems. The results are compared with the outcomes of algorithms found in the literature.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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