日冕中的自由电子被附近离子的电场散射，通过自由-自由跃起损失动能并辐射光子（free-free emission）。这一物理过程是日冕极紫外波段和软X射线波段辐射的主要来源。
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一百万天体在现代天文观测数量上并不算多。目前在中国虚拟天文台主节点上包括郭守敬望远镜（LAMOST）观测数据在内，就有十亿天体的总体量。 但是一百万天体到了天文学家手里，仍然是一个相对庞大的工作量。这一百万天体杂乱无章，有恒星、类星体，还有星系或星云，不同的研究方向就只会专注于其中一种天体。 所以拿到一百万天体，天文学家要做光谱分类。不同天体的光谱是由其组成成分和物理环境双重的差异共同造成的，可以说是独一无二的。光谱对于天体来说就是身份识别的指纹，而光谱分类就是天文学家手中的“星辰整理术”。 比如这张太阳色球照片和左下角的太阳光谱，就是它独一无二的“身份证”。
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Sites on the Antarctic plateau are characterized by comparatively weak turbulence in the free atmosphere ...below 8 metres for 31 per cent of the time, with median seeing of 0.31 arcseconds, consistent with free-atmosphere ...layer makes it less challenging to locate a telescope above it, thereby giving greater access to the free ...
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Sites on the Antarctic plateau are characterized by comparatively weak turbulence in the free atmosphere ...below 8 metres for 31 per cent of the time, with median seeing of 0.31 arcseconds, consistent with free-atmosphere ...layer makes it less challenging to locate a telescope above it, thereby giving greater access to the free ...
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Sites on the Antarctic plateau are characterized by comparatively weak turbulence in the free atmosphere ...below 8 metres for 31 per cent of the time, with median seeing of 0.31 arcseconds, consistent with free-atmosphere ...layer makes it less challenging to locate a telescope above it, thereby giving greater access to the free ...
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Sites on the Antarctic plateau are characterized by comparatively weak turbulence in the free atmosphere ...below 8 metres for 31 per cent of the time, with median seeing of 0.31 arcseconds, consistent with free-atmosphere ...layer makes it less challenging to locate a telescope above it, thereby giving greater access to the free ...
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If you need some phase screen with specified properties, feel free to contact the corresponding author ...
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If you need some phase screen with specified properties, feel free to contact the corresponding author ...
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（4011篇） standard deviation （3961篇） large number（3840篇） future work （3545篇） bottom panel（3541篇） free ...
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other hand （7809篇） right panel （4354篇） wide range（3822篇） large number（3745篇） free parameter（3494篇 ...
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Based on nonlinear force-free (NLFF) coronal magnetic field models with a high degree of solenoidality ...
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Based on nonlinear force-free (NLFF) coronal magnetic field models with a high degree of solenoidality ...
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polarity inversion line" region and α <SUB>HFED</SUB> within the area of high photospheric magnetic free ...
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polarity inversion line" region and α <SUB>HFED</SUB> within the area of high photospheric magnetic free ...
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polarity inversion line" region and α <SUB>HFED</SUB> within the area of high photospheric magnetic free ...
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polarity inversion line" region and α <SUB>HFED</SUB> within the area of high photospheric magnetic free ...