Radio Emission Sources During Solar Eclipse on March 29 2006

2007 17th International Crimean Conference - Microwave & Telecommunication Technology Pub Date : 2007-10-29 DOI:10.1109/CRMICO.2007.4368958

Y. Yurovsky

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Abstract

On the base of eclipse observations the brightness temperature of undisturbed parts of solar disk was determined during the minimum solar activity between 23 and 24-th 11-year's cycles. The temperature was equal Td_10.5=(43.7 plusmn 0.5) 10³ K at wavelength 10.5 cm and Td_12.0= (51.8 plusmn 0.5) 10³ K at wavelength 12.0 cm. Radio brightness distribution above group of spots NOAA 0866 was calculated. It is shown that on both wavelengths the source consists of a compact bright nucleus with sizes about 50ldr10³ km, having temperature T_b10.5=0.94ldr10⁶ K and T_b12.0= 2.153ldr106 K, which are located at heights h_10.5= 33.5ldr10³ km and h_12.0= =43.35ldr10³ km above the spot, and extended halo with temperature Tb= (230-300)10³ K, reaching the height of 157ldr10³ km above photosphere. Thus, the eclipse observation on March 29, 2006 has allowed experimentally to determine the height of coronal condensation during minimum solar activity and to estimate physical parameters of plasma near to its top border.

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2006年3月29日日食期间的射电发射源

在日食观测的基础上，确定了在11年周期的第23 ~ 24个太阳活动极小期，太阳盘面未受干扰部分的亮温。在波长10.5 cm处Td10.5=(43.7 plusmn 0.5) 103 K，在波长12.0 cm处Td12.0= (51.8 plusmn 0.5) 103 K。计算了NOAA 0866组黑点上方的射电亮度分布。结果表明，在这两个波长上，光源由一个大小约为50ldr103 km的致密明亮核组成，其温度分别为Tb10.5=0.94ldr106 K和Tb12.0= 2.153ldr106 K，分别位于光斑上方h10.5= 33.5ldr103 km和h12.0= =43.35ldr103 km处，以及温度为Tb= (230 ~ 300)103 K的扩展晕组成，光晕在光球上方157ldr103 km处。因此，2006年3月29日的日食观测可以通过实验确定太阳活动最小时日冕凝结的高度，并估计其顶部边界附近等离子体的物理参数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2007 17th International Crimean Conference - Microwave & Telecommunication Technology

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