Direct images of the Sun were photographed in continuum emission centered at 6900 Å by the jumping film method near the second contact of the Mexico eclipse on 7 March 1970. The band width was 150 Å defined by a combination of a sharp cut filter and KODAK IV F film. The intensity distribution of the solar outer layers obtained shows a steep decrease by a factor of 0.9 in logarithmic units around 2500 km. This is interpreted as the boundary of the chromosphere and corona. Spicules observed at 3500 km are explained by log n e = 11.25 and T e ≈ 6000 K. Discussions are made in relation to the other observations and some chromosphere models.
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Makita, M. The chromosphere in continuum emission observed at the total solar eclipse on 7 March 1970. Sol Phys 24, 59–71 (1972). https://doi.org/10.1007/BF00231082
- Intensity Distribution
- Outer Layer
- Band Width
- Solar Eclipse
- Direct Image