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Researchers offer look into 'central engine' powering a solar flare（图）
Researchers offer look central engine powering solar flare
2020/7/31
In a U.S. National Science Foundation-funded study published in Nature Astronomy, an international team of researchers has presented a new, detailed look inside the "central engine" of a lar...
中国科学院云南天文台米波太阳射电频谱仪观测到罕见的断裂II型射电暴 首次揭示了CME激波穿越CME/flare电流片的物理过程（图）
太阳射电频谱仪；断裂II型射电暴；flare电流片
2021/11/16
最近，利用云南天文台研制的米波太阳射电频谱仪，高冠男、汪敏和林隽等人观测到一个罕见的具有断裂结构的II型射电暴及其射电精细结构（图1下）。经研究发现，该射电暴的断裂结构源于CME驱动的激波穿越之前CME拉伸出的电流片的物理过程（图2）。利用观测频率与日冕密度的关系，并结合日冕密度模型计算出了激波所在的日冕高度约为1.42 - 1.56 Rsun，激波的速度约为1100 km/s。根据II型射电暴的...
Height structure of X-ray, EUV and white-light emission in a solar flare
Sun: fl ares – Sun: X-rays, gamma-rays – Sun: radio radiation – Sun: UV radiation – Acceleration of particles
2011/10/11
The bulk of solar flare emission originates from very compact sources located in the lower solar atmosphere and seen in various wavelength ranges: near optical, UV, EUV, soft and hard X-rays, and gamm...
Extremely Energetic 4B/X17.2 Flare and Associated Phenomena
Sun: Flares coronal mass ejections reconnection
2010/9/16
We observed 4B/X17.2 flare in Hα from super-active region NOAA 10486 at ARIES, Nainital. This is one of the largest flares of current solar cycle 23, which occurred near the Sun’s center and produced ...
Photospheric, Chromospheric and Helioseismic Signatures of a Large Flare in Super-active Region NOAA 10486
Solar flares flare trigger ring diagram
2010/9/16
NOAA 10486 produced several powerful flares, including the 4B/X17.2 superflare of October 28, 2003/11:10 UT. This flare was extensively covered by the Hα and GONG instruments operated at the Udaipur S...
Solar Flare Physics Enlivened by TRACE and RHESSI
Solar flares particle acceleration hard X-rays
2010/9/15
The Transition Region and Coronal Explorer (TRACE) gave us the highestEUVspatial resolution and the Ramaty High Energy Solar Spectrometric Imager (RHESSI) gave us the highest hard X-ray and gammaray s...
Extremely Energetic 4B/X17.2 Flare and Associated Phenomena
Sun:Flares coronal mass ejections reconnection
2009/5/7
We observed 4B/X17.2 flare in Ha from super-active region NOAA 10486 at ARIES, Nainital. This is one of the largest flares of current solar cycle 23, which occurred near the Sun'™s center and pr...
Photospheric, Chromospheric and Helioseismic Signatures of a Large Flare in Super-active Region NOAA 10486
Solar flares flare trigger ring diagram
2009/5/7
NOAA 10486 produced several powerful flares, including the 4B/X17.2 superflare of October 28, 2003/11:10 UT. This flare was extensively covered by the Hα and GONG instruments operat...
Flare Ribbon Expansion and Energy Release
Sun:activity Sun:flares chromosphere corona X-rays gamma rays
2009/5/7
We report a detailed examination about the relationship between the evolution of the Hα flare ribbons and the released magnetic energy during the April 10 2001 flare. In the Hα images, sever...
Solar Flare Physics Enlivened by TRACE and RHESSI
Solar flares particle acceleration hard X-rays
2009/5/6
The Transition Region and Coronal Explorer (TRACE) gave us
the highestEUVspatial resolution and the Ramaty High Energy Solar Spectrometric
Imager (RHESSI) gave us the highest hard X-ray and gammara...