Intensity ratios of spectral cores CA II K to H across a sunspot

Details Intensity ratios of spectral cores CA II K to H across a sunspot Intensity ratios of spectral cores CA II K to H across a sunspot

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...78..347y&link_type=abstract

Solar Physics, vol. 78, June 1982, p. 347-349. Research supported by the U.S.-Republic of Korea Cooperative Science Program, and

Physics

4

Calcium, H Lines, K Lines, Solar Spectra, Sunspots, Penumbras, Spectrographs, Umbras

Scientific paper

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 + or - 0.04, 1.19 + or - 0.05, and 1.25 + or - 0.03, respectively.

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