High-resolution photography of the solar chromosphere

✍ Scribed by R. J. Bray; R. E. Loughhead

• Publisher: Springer
• Year: 1983
• Tongue: English
• Weight: 899 KB
• Volume: 85
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00148264

✦ Synopsis

High-resolution filtergrams of an active region loop taken at seven wavelengths in He have been used to derive the contrast at eleven locations along its length as a function of wavelength. With an appropriate choice of parameters, theoretical curves calculated on the basis of the 'cloud' model give a reasonable fit to the observed contrast profiles. The inferred line-of-sight components of the mass velocity range from 27 km s-1 upward to 78 km s-I downward. However, more accurate profiles and a more rigorous theory are needed to confirm the validity of this application of the cloud model.