[Chinese Term] K Corona
[Foreign Words] K corona
[Author] Zhang Zhenda
For example, at a high temperature of 1 million degrees, the hydrogen Ha line is widened by electrons to 120 angstroms, which is more than 100 times larger than the original width, so it cannot be identified. The energy distribution of the continuous spectrum of K-crowns is similar to that of photospheres. The light of the K-Crown is polarized. The light intensity scattered by coronal electrons does not exceed 10% of the photosphere, and the scattered light has little chance of re scattering. The light scattered by each coronal electron is proportional to the brightness illuminated by the photosphere, so the K-coronal gives the total number of electrons observed along the visual direction, from which the distribution of electron density can be calculated. Because the electron density of the corona is affected by the solar activity, the shape of the K-corona is related to the solar activity. When the solar activity is extremely high, the electron density increases, and the K-corona is nearly spherical symmetric; while when the solar activity is extremely low, the K-corona is relatively flat
