arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1601.07375stat.APastro-ph.IMmath.STstat.TH
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用恒星大气的流体动力学模拟进行周期图标准化:应用于系外行星探测

Using hydrodynamical simulations of stellar atmospheres for periodogram standardization : application to exoplanet detection

Sophia Sulis, David Mary, Lionel Bigot

摘要:

我们的目标是设计一种检测方法的系外行星的签名(多个正弦曲线),这是强大的和强大的部分未知的统计数据下的原假设。在所考虑的应用中,噪声主要是由恒星大气产生的,统计数据取决于几个参数的复杂相互作用。然而,流体动力学(HD)模拟的最新进展表明,天体物理学家可以离线数值模拟真实的恒星噪声。我们提出了一种检测方法,通过HD模拟校准,并分析其性能。理论结果与模拟合成和真实数据的比较表明,该方法是强大的和强大的。

英文摘要:

Our aim is to devise a detection method for exoplanet signatures (multiple sinusoids) that is both powerful and robust to partially unknown statistics under the null hypothesis. In the considered application, the noise is mostly created by the stellar atmosphere, with statistics depending on the complicated interplay of several parameters. Recent progresses in hydrodynamic (HD) simulations show however that realistic stellar noise realizations can be numerically produced off-line by astrophysicists. We propose a detection method that is calibrated by HD simulations and analyze its performances. A comparison of the theoretical results with simulations on synthetic and real data shows that the proposed method is powerful and robust.

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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