Linear change and minutes variability of solar wind velocity revealed by FAST
Linear change and minutes variability of solar wind velocity revealed by FAST
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FAST揭示太阳风速度的线性变化和分钟变化
DOI：
10.1093/mnras/stac2059
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发表时间：
2022-07
影响因子：
4.8
通讯作者：
O. Chang
中科院分区：
文献类型：
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作者：
Li-Jia Liu;Bo Peng;Lei Yu;B. S. Liu;Ji-Guang Lu;Ye-Zhao Yu;Hong-Wei Xi;Ming Xiong;O. Chang
摘要行星际闪烁观测为研究太阳风和空间天气提供了重要而有效的手段。500米口径球面射电望远镜(FAST)进行了一系列IPS观测。超乎寻常的灵敏度和宽广的频率覆盖使FAST成为研究IPS的理想平台。在本文中，我们给出了用L波段接收器快速观测IPS的一些初步科学结果。基于2020年9月26-28日快速观测的太阳风速拟合值，我们发现风速随频率的增加而线性减小，这在文献中尚未见报道。我们还探测到了太阳风速在3-5min的时间尺度上的变化，这意味着背景太阳风的缓慢变化，高、低速流的共存，或者是准周期电子密度涨落的反映。
ABSTRACT 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 2020 September 26–28, 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 time-scale of 3–5 min, 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.
DOI：
--
发表时间：
2000
期刊：
--
影响因子：
--
作者：
Van Haarlem
通讯作者：
Van Haarlem
DOI：
10.5194/se-2020-89-sc4
发表时间：
2020-07
期刊：
--
影响因子：
--
作者：
PhD Thesis;Cyber Rаnge;Lаb Mаnаger
通讯作者：
PhD Thesis;Cyber Rаnge;Lаb Mаnаger