Observation and Modeling of Coronal "Moss" With the EUV Imaging Spectrometer on Hinode

Details Observation and Modeling of Coronal "Moss" With the EUV Imaging Spectrometer on Hinode Observation and Modeling of Coronal "Moss" With the EUV Imaging Spectrometer on Hinode

2007-09-04

arxiv.org/abs/0709.0396v1

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1086/529186

Observations of transition region emission in solar active regions represent a powerful tool for determining the properties of hot coronal loops. In this Letter we present the analysis of new observations of active region moss taken with the Extreme Ultraviolet Imaging Spectrometer (EIS) on the \textit{Hinode} mission. We find that the intensities predicted by steady, uniformly heated loop models are too intense relative to the observations, consistent with previous work. To bring the model into agreement with the observations a filling factor of about 16% is required. Furthermore, our analysis indicates that the filling factor in the moss is nonuniform and varies inversely with the loop pressure.

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