Analysis of the supergranulation structure in coronal holes

✍ Scribed by G. Calamai; F. Chiuderi Drago; G. Pettini

• Book ID: 104643865
• Publisher: Springer
• Year: 1980
• Tongue: English
• Weight: 252 KB
• Volume: 65
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00151390

✦ Synopsis

Monochromatic rasters of six EUV lines taken in the centre of a coronal hole are analysed and the cell-network structure at different heights in the solar atmosphere is shown. Also a comparison with the average cell-centre and network intensities of another coronal hole is performed showing a good agreement between the two.

In this note we present an analysis of the supergranulation structure in the transition region of coronal holes. For this purpose we have studied the monochromatic rasters taken in the six EUV lines shown in Figure 2. They have been observed in the centre of the solar disk using the Harvard College Observatory EUV spectrometer onboard the Skylab on May 31, 1973, date of the first meridian transit of Coronal Hole 1 (CH1).

Each raster covers a field of 5' x 5' with 132 x 60 data points. The spatial resolution of the instrument is 5", the spectral one 1.6 ~, the time needed to complete a raster is 3m49 s.