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arXiv 0908.0562astro-ph.SR
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220.7微赫兹信号的太阳起源:g模式的可能成分?

On the solar origin of the signal at 220.7microHz: A possible component of a g mode?

A. Jimenez, R. A. Garcia

摘要:

近几十年来,太阳的引力模式一直是长期而困难的研究对象。多亏了上一代仪器(BiSON、GONG和SoHO上的三台日震仪器)积累的数据,科学家们已经能够找到它们存在的迹象。然而,这种模式的个别检测仍然是回避。在这篇文章中,我们研究了220.7微赫兹的信号,这是一个峰值,是目前在过去10年的大部分日震数据。该信号已经被识别为在GOLF多普勒速度信号中检测到的g模式候选的一个分量。特别是使用SoHO上的VIRGO/SPM仪器研究了该峰的性质。首先,我们分析所有可用的仪器数据的处女座和SOHO(内务)拒绝任何可能的仪器来源。没有发现任何关系,这意味着信号有一个太阳起源。使用蒙特卡罗模拟,我们发现,超过99%的置信水平,在处女座/SPM中发现的信号是非常不可能是由于纯噪声。

英文摘要:

Gravity modes in the Sun have been the object of a long and difficult search in recent decades. Thanks to the data accumulated with the last generation of instruments (BiSON, GONG and three helioseismic instruments aboard SoHO), scientists have been able to find signatures of their presence. However, the individual detection of such modes remains evasive. In this article, we study the signal at 220.7 microHz which is a peak that is present in most of the helioseismic data of the last 10 years. This signal has already been identified as being one component of a g-mode candidate detected in the GOLF Doppler velocity signal. The nature of this peak is studied in particular using the VIRGO/SPM instrument aboard SoHO. First we analyse all the available instrumental data of VIRGO and SoHO (housekeeping) to reject any possible instrumental origin. No relation was found, implying that the signal has a solar origin. Using Monte Carlo simulations, we find, with more than 99% confidence level, that the signal found in VIRGO/SPM is very unlikely to be due to pure noise.

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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