Synoptic solar observations of the Solar Flare Telescope focusing on space weather

Synoptic solar observations of the Solar Flare Telescope focusing on space weather
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太阳耀斑望远镜的天气观测主要关注空间天气

DOI:
10.1051/swsc/2020044
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发表时间:
2020
影响因子:
3.3
通讯作者:
Morita Satoshi
Morita Satoshi
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Hanaoka Yoichiro;Sakurai Takashi;Otsuji Ken’ichi;Suzuki Isao;Morita Satoshi

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日本国家天文台的太阳小组正在用太阳耀斑望远镜进行太阳天气观测。这是长期太阳监测的一部分,有助于研究制约太阳活动周期的太阳发电机,同时也是为空间气象研究作出贡献的一种尝试。观测包括Hα、Ca K、G带和连续谱的滤光片成像,以及He I 1083.0 nm/Si I 1082.7 nm和Fe I 1564.8 nm谱线的偏振光谱。获得了光球和色球的亮度、多普勒信号和磁场信息。除了监测耀斑和暗条爆发等动态现象外,我们还可以根据这些数据跟踪驱动它们的磁场的演变。此外,太阳灯丝中的磁场在其爆发后发展成为行星际磁云的一部分,并偶尔撞击地球,可以在其爆发前的配置中推断。从预测空间气象现象的角度来看,这种超越传统的太阳监测的观测今后将变得至关重要。目前使用太阳耀斑望远镜进行的天气观测被认为是未来使用先进仪器进行太阳天气观测的先驱。
The solar group at the National Astronomical Observatory of Japan is conducting synoptic solar observation with the Solar Flare Telescope. While it is a part of a long-term solar monitoring, contributing to the study of solar dynamo governing solar activity cycles, it is also an attempt at contributing to space weather research. The observations include imaging with filters for Hα, Ca K, G-band, and continuum, and spectropolarimetry at the wavelength bands including the He I 1083.0 nm/Si I 1082.7 nm and the Fe I 1564.8 nm lines. Data for the brightness, Doppler signal, and magnetic field information of the photosphere and the chromosphere are obtained. In addition to monitoring dynamic phenomena like flares and filament eruptions, we can track the evolution of the magnetic fields that drive them on the basis of these data. Furthermore, the magnetic field in solar filaments, which develops into a part of the interplanetary magnetic cloud after their eruption and occasionally hits the Earth, can be inferred in its pre-eruption configuration. Such observations beyond mere classical monitoring of the Sun will hereafter become crucially important from the viewpoint of the prediction of space weather phenomena. The current synoptic observations with the Solar Flare Telescope is considered to be a pioneering one for future synoptic observations of the Sun with advanced instruments.
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