Bright threads in the inner wing of solar CA II K line

Details Bright threads in the inner wing of solar CA II K line Bright threads in the inner wing of solar CA II K line

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987soph..112...59s&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 112, no. 1, 1987, p. 59-66.

Physics

9

Calcium, Potassium, Solar Granulation, Solar Spectra, Solar Temperature, Spectral Energy Distribution, Density Distribution, Solar Activity, Spatial Distribution, Spectrograms

Scientific paper

On spectrograms of the K line at quiet regions of the Sun, bright threads visible in the real continuum due to the granulations are also seen in the outer wing as far as |Δλ| ≡ 3 Å from the line centre. At the inner wing (3 Å ⪆ |Δλ| ⪆ 0.5 Å) bright threads are also seen, but their spatial distribution is different from the former ones. The threads at the inner wing appear at intergranular regions, and many of them are seen inside the supergranulation. Their size and number density are about the same as those of the granulation. These facts reflect that the penetration of the granular high temperature layer stops at a certain height in the photosphere, and that the intergranular bright threads at the inner wing are due to a hotter temperature layer, located at a considerably higher photospheric layer than the granulation.

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