论文标题
快速揭示的线性变化和太阳风速的分钟变化
Linear change and minutes variability of solar wind velocity revealed by FAST
论文作者
论文摘要
星际闪烁（IPS）的观察提供了研究太阳风和太空天气的重要有效的方法。一系列的IPS观察是由五百米的光圈球形射电望远镜（FAST）进行的。非凡的灵敏度和广泛的覆盖范围使快速成为IPS研究的理想平台。在本文中，我们通过L频段接收器快速观察IPS提出了一些第一个科学结果。基于2020年9月26日至28日快速观察的太阳风速拟合值，我们发现速度随频率线性的增加而降低，这在文献中尚未报道。而且我们还检测到在3-5分钟的时间尺度上太阳风速的变化，这意味着背景太阳风的缓慢变化，高速和低速流的共存或反应性电子密度波动的反映。
Observation of Interplanetary Scintillation (IPS) provides an important and effective way to study the solar wind and the space weather. A series of IPS observations were conducted by the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The extraordinary sensitivity and the wide frequency coverage make FAST an ideal platform for IPS studies. In this paper we present some first scientific results from FAST observations of IPS with the L-band receiver. Based on the solar wind velocity fitting values of FAST observations on September 26-28, 2020, we found that the velocity decreases with increasing frequency linearly, which has not yet been reported in literature. And we have also detected a variation of solar wind velocity on a timescale of 3-5 minutes, which imply the slow change of the background solar wind, a co-existence of high- and low-speed streams, or a reflect of the quasi-periodic electron-density fluctuations.
