Intensity ratios of spectral cores Ca ii K to H across a sunspot
Abstract
Ratios of the intensity in the core of the Ca II K line to the intensity of the H line core across a sunspot (SPO 5007) were determined from measurements of spectra made simultaneously with the Echelle spectrograph at the Vacuum Tower Telescope, Sacramento Peak Observatory. The measured values averaged over the neighboring nonspot region, the penumbra and the umbra are found to be 1.13 ± 0.04, 1.19 ± 0.05, and 1.25 ± 0.03, respectively.
- Publication:
-
Solar Physics
- Pub Date:
- June 1982
- DOI:
- 10.1007/BF00151613
- Bibcode:
- 1982SoPh...78..347Y
- Keywords:
-
- Calcium;
- H Lines;
- K Lines;
- Solar Spectra;
- Sunspots;
- Penumbras;
- Spectrographs;
- Umbras;
- Solar Physics;
- Intensity Ratio;
- Line Core;
- Peak Observatory;
- Echelle Spectrograph;
- Vacuum Tower