Coronal loop density profile estimated by forward modelling of EUV intensity
نویسندگان
چکیده
منابع مشابه
Inferring the Coronal Density Irregularity from Euv Spectra
Understanding the density structure of the solar corona is important for modeling both coronal heating and the solar wind. Direct measurements are difficult because of line-of-sight integration and possible unresolved structures. We present a new method for quantifying such structures using density-sensitive extreme ultraviolet line intensities to derive a density irregularity parameter, a rela...
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The FOMO code was developed to calculate the EUV and UV emission from optically thin coronal plasmas. The input data for FOMO consists of the plasma density, temperature and velocity on a 3D grid. This is translated to emissivity on the 3D grid, using CHIANTI data. Then, the emissivity is integrated along the line-of-sight (LOS) to calculate the emergent spectral line for synthetic spectrometer...
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We present sensitive coronal line (Fe IX and Fe XII) observations by the Extreme ultraviolet Imaging Telescope (EIT) onboard the SOHO satellite. The thermal emission of the quiet corona is detected to uctuate in time and space, presumably the result of localized heat inputs. Signiicant uctuations are found in 85% of all pixels. The more prominent enhancements are identiied with previously repor...
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Context. The new generation of extreme-ultraviolet (EUV) imagers onboard missions such as the Solar Dynamics Observatory (SDO) and Solar Orbiter (SO) will provide the most accurate spatial measurements of post-flare coronal loop oscillations yet. The amplitude profiles of these loop oscillations contain important information about plasma fine structure in the corona. Aims. We show that the posi...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2017
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201730458