SOLAR-CYCLE DEPENDENCE OF THE SUNS APPARENT RADIUS IN THE NEUTRAL IRON SPECTRAL LINE AT 525 NM

Ulrich RK.; Bertello L.

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SOLAR-CYCLE DEPENDENCE OF THE SUNS APPARENT RADIUS IN THE NEUTRAL IRON SPECTRAL LINE AT 525 NM

机译：525海里中性铁谱线中太阳视半径的太阳周期依赖性

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SPACE-BASED observations have established that the Sun's irradiance varies with solar magnetic activity(1-4). A fraction of this variability arises from the increased area of cool gas associated with sunspots, which decreases irradiance; but on average the blocking effect of sunspots is more than offset by the increased emission from photospheric faculae and other effects of magnetic activity(5) (although the precise contributions of these opposing effects remain poorly constrained(6,7)). Here we show that the apparent radius of the Sun, when viewed in the spectral line of neutral iron at 525 nm, also varies in phase with solar magnetic activity. This variation probably results from changes in the temperature profile of the Sun's atmosphere with the solar cycle. If similar behaviour is found for other spectral lines, changes in the apparent radius of the Sun could account for a significant fraction (similar to 20%) of the total irradiance variations. [References: 16]

机译：基于空间的观测已经确定了太阳的辐照度随太阳磁活动的变化而变化（1-4）。这种变化的一小部分来自与黑子相关的冷气面积的增加，从而降低了辐照度；但是平均而言，黑子的阻挡作用远远超过了光球状粉云的发射和磁活动的其他作用所抵消（5）（尽管这些相反作用的精确贡献仍然受到限制（6,7））。在这里，我们显示，当在525 nm的中性铁的光谱线中观察时，太阳的视半径也随太阳磁活动的相位而变化。这种变化可能是由于太阳大气层温度随太阳周期的变化而引起的。如果在其他光谱线上发现类似的行为，则太阳视在半径的变化可能占总辐照度变化的很大一部分（约20％）。 [参考：16]

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来源
《Nature》 |1995年第6546期|p. 214-215|共2页
作者
Ulrich RK.; Bertello L.;
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作者单位

UNIV CALIF LOS ANGELES DEPT PHYS & ASTRON LOS ANGELES CA 90024 USA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种 eng
中图分类自然科学总论;
关键词
Luminosity; Irradiance;

机译：光度;辐照度;

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专利

1. Dependence of Fe-57 hyperfine field in yttrium iron garnet on ionic radius of diamagnetic defects: NMR study [J] . Stepankova H., Novak P., Englich J., Australian Journal of Physics . 1998,第2期

机译：钇铁石榴石中Fe-57超细场对反磁性缺陷离子半径的依赖性：NMR研究
2. Estimation of numerically stable step-size for neutral delay-differential equations via spectral radius [J] . Guang-Di Hu, Guang-Da Hu, Ming-Zhu Liu Journal of Computational and Applied Mathematics . 1997,第2期

机译：通过谱半径估计中立型时滞微分方程的数值稳定步长
3. Temperature and Pressure Dependence of High-Resolution Air-Broadened Absorption Cross Sections of NO_2 (415-525 nm) [J] . S. A. Nizkorodov, S. P. Sander, L. R. Brown The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory . 2004,第22期

机译：NO_2（415-525 nm）的高分辨率空气膨胀吸收截面的温度和压力依赖性
4. DEPENDENCE OF THE SPECTRAL FACTOR ON THE AVERAGE PHOTON ENERGY IN SOME PV TECHNOLOGIES DEPLOYED IN SUNNY INLAND SITES [C] . Research Group European Photovoltaic Solar Energy Conference and Exhibition . 2013

机译：内陆站点采用的某些光伏技术中光谱因子对平均光子能量的依赖性
5. Corrosion of Electrodeposited Nanocrystalline Nickel-Iron (Ni-Fe) Alloys in Neutral and Alkaline Sulphate Environments [D] . Sabatini, Michael. 2018

机译：中性和碱性硫酸盐环境下电沉积纳米晶镍铁（Ni-Fe）合金的腐蚀
6. The Dependence of Spectral Impedance on Disc Microelectrode Radius [O] . Ashish K. Ahuja, Matthew R. Behrend, John J. Whalen III, -1

机译：光谱阻抗对圆盘微电极半径的依赖性
7. Estimation of numerically stable step-size for neutral delay-differential equations via spectral radius [O] . Hu Guang-Di, Hu Guang-Da, Liu Ming-Zhu 1997

机译：通过谱半径估计中立型时滞微分方程的数值稳定步长

SOLAR-CYCLE DEPENDENCE OF THE SUNS APPARENT RADIUS IN THE NEUTRAL IRON SPECTRAL LINE AT 525 NM

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