On the Shape of H and K CA II Line Profiles in Sunspot Umbral Spectra
Abstract
Emission cores of the H and K Caii lines observed in sunspot umbral spectra are mainly single-peaked, while semi-empirical umbral models predict their double-peak character. It is verified whether a single-peaked profile can be the result of the smearing of an originally double-peaked profile by macroturbulence. The integral convolution equation is solved for measured H and K profiles, and it is shown that, also after the deconvolution, they remain single-peaked even at an r.m.s. value of the macroturbulence velocity equal to 5 km s-1.
- Publication:
-
Solar Physics
- Pub Date:
- July 1997
- DOI:
- 10.1023/A:1004911929445
- Bibcode:
- 1997SoPh..173..275S
- Keywords:
-
- Convolution;
- Deconvolution;
- Line Profile;
- Convolution Equation;
- Integral Convolution