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arXiv 1202.2263astro-ph.SR
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用毫秒级射电望远镜测量太阳风的电子密度和磁场

Measurement of the electron density and magnetic field of the solar wind using millisecond pulsars

X. P. You, W. A. Coles, G. B. Hobbs, R. N. Manchester

摘要:

太阳附近的太阳风的磁场很难直接测量。对被太阳风遮蔽的线偏振射电源的法拉第旋转的测量提供了一个估计这种磁场的独特机会,并且该技术在过去已经被广泛使用。然而法拉第旋转是电子密度与磁场在路径上的投影的乘积的路径积分。太阳附近的电子密度可以用几种方法测量,但变化很大。本文表明,用毫秒级射电星作为线偏振射电源,在6-10 $R_\odot$处同时测量路径积分电子密度和法拉第旋转是可能的。通过分析法拉第旋转测量与不同时的电子密度的意见,我们表明,这些意见显着提高磁场估计的准确性。

英文摘要:

The magnetic field of the solar wind near the Sun is very difficult to measure directly. Measurements of Faraday rotation of linearly polarized radio sources occulted by the solar wind provide a unique opportunity to estimate this magnetic field, and the technique has been widely used in the past. However Faraday rotation is a path integral of the product of electron density and the projection of the magnetic field on the path. The electron density near the Sun can be measured by several methods, but it is quite variable. Here we show that it is possible to measure the path integrated electron density and the Faraday rotation simultaneously at 6-10 $R_\odot$ using millisecond pulsars as the linearly polarized radio source. By analyzing the Faraday rotation measurements with and without the simultaneous electron density observations we show that these observations significantly improve the accuracy of the magnetic field estimates.

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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