THE SOLAR Mg II h AND k LINES –Observations and Radiative Transfer Modeling

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• 作者：UITENBROEK ; H.
• 刊名：Solar Physics
• 出版年：1997
• 出版时间：1997
• 年：1997
• 卷：172
• 期：1/2
• 页码：109-116
• 全文大小：463 KB

文摘

This paper presents observations of the MgII h and k linesobtained with the UVSP instrument that flew aboard the SMM satellite.Both spatially averaged and resolved observations are comparedwith calculated profiles of the lines from standard, plane-parallelsolar models.The radiative transfer calculations presented take full account of partialfrequency redistribution and wavelength overlap of the h and k lines.A comparison between theoretical and observed wing profiles indicatesthat current one-dimensional models underestimate the temperature in themiddle photosphere.The cores of spatially resolved dark intra-network profiles are wellreproduced by the model calculations, while the spatially averagedprofiles have in general broader emission peaks, indicating that theadditional broadening is due to a contribution of magnetic network profiles.