UK-Japan Cooperative Study of Solar Flares with the SOLAR-A Spacecraft

英日利用 SOLAR-A 航天器合作研究太阳耀斑

• 批准号: 04044171
• 负责人: WATANABE Tetsuya
• 金额: $ 4.54万
• 依托单位: National Astronomical Observatory
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04044171/
• 关键词: High energy solar phenomena; solar flares; High resolution observations in soft X-ray spectroscopy; Brag crystal spectrometer; Scientific satellite; 太陽軟X線スペクトル; 太陽コロナ

The Yohkoh mission was launched in 1991 for the observation of solar flares with a coordinated set of instruments in X-rays and gamma-rays. The Brag crystal spectrometer(BCS) on Yohkoh has an order of magnitude increased sensitivity with less weight and size, if it is compared to the spectrometers flown in the previous solar activity maximum. The instrument was designed and manufactured under the Anglo-Japanese cooperation. The main scientific goal of this instrument is to observe the plasma motions and the transient heating and particle acceleration of flaring plasma at the initial phases of solar flares. The scientific analyses of the Yohkoh data have been done by solar physicists of the both countries. The completely blueshifted emission line was found in the very beginnings of flares. This new discovery supports the hypothesis of chromospheric evaporation. The sulphur emission from solar active regions suggests a possibility of the microflare heating of active regions. The solar corona is very dynamic and many kinds of activity take place as the result of magnetic reconnection.

Yohkoh使命于1991年发射，目的是用一套协调的X射线和伽马射线仪器观测太阳耀斑。如果与以前太阳活动最大时飞行的光谱仪相比，Yohkoh上的Brag晶体光谱仪（BCS）的灵敏度增加了一个数量级，重量和尺寸都减少了。该仪器是在英日合作下设计和制造的。该仪器的主要科学目标是观测太阳耀斑初始阶段的等离子体运动以及耀斑等离子体的瞬时加热和粒子加速。两国的太阳物理学家对Yohkoh数据进行了科学分析。完全蓝移的发射线是在耀斑刚开始时发现的。这一新发现支持了色球蒸发的假说。太阳活动区的硫排放表明活动区有微耀斑加热的可能性。日冕是一个动态的系统，磁场重联是日冕活动的主要原因。

项目成果

Y.Uchida et al.: "X-Ray Solar Physics from Yohkoh" Universal Academy Press, 300 (1994)

Y.Uchida 等人：“来自 Yohkoh 的 X 射线太阳物理学”Universal Academy Press，300 (1994)

T.Watanabe: "Flaring Coronal Sturctures" Proc.IAU Colloq.No.144. (印刷中). (1994)

T.Watanabe：“耀斑冠状结构”Proc.IAU Colloq.No.144（印刷中）。

K.J.H.Phillips et al.: "Iron K-Beta Line Emission in Solar Flares observed by Yohkoh and the Solar Abundance" Astrophys.J.(in press). (1994)

K.J.H.Phillips 等人：“Yohkoh 观察到的太阳耀斑中的铁 K-β 线发射和太阳丰度”Astrophys.J.（出版中）。

K.J.H.Phillips et al.: "Iron K-Beta Line Emission in Solar Flares Observed by Yohkoh and the Solar Abundance" Astrophysical Journal. 印刷中. (1994)

K.J.H.Phillips 等人：“Yohkoh 观测到的太阳耀斑中的铁 K-β 线发射和太阳丰度”，出版中（1994 年）。

R.D.Bentley et al.: "The Correlation of Solar Flare Hard X-Ray Bursts with Doppler Blueshifted Soft X-Ray Flare Emission" Astrophysical Journal. (印刷中). (1994)

R.D. Bentley 等人：“太阳耀斑硬 X 射线爆发与多普勒蓝移软 X 射线耀斑发射的相关性”天体物理学杂志（1994 年）。