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Intensity ratios of spectral cores Ca ii K to H across a sunspot

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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.

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References

  • Beebe, H. A., Baggett, W., and Yun, H. S.: 1982, Solar Phys., in press.

  • Firstova, N. M.: 1980, Soviet Astron. 24, 384.

    Google Scholar 

  • Linsky, J. L.: 1970, Solar Phys. 11, 255.

    Google Scholar 

  • Mattig, W. and Kneer, F.: 1978, Astron. Astrophys. 65, 11.

    Google Scholar 

  • Shine, R. A. and Linsky, J. L.: 1972, Solar Phys. 25, 357.

    Google Scholar 

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Authors and Affiliations

  1. Department of Astronomy, Seoul National University, Seoul, Korea

    H. S. Yun

  2. Department of Astronomy, New Mexico State University, Las Cruces, New Mexico, U.S.A.

    H. A. Beebe

Authors
  1. H. S. Yun
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  2. H. A. Beebe
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Additional information

This work was supported by the U.S.-Republic of Korea Cooperative Science Program (K-24).

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Yun, H.S., Beebe, H.A. Intensity ratios of spectral cores Ca ii K to H across a sunspot. Sol Phys 78, 347–349 (1982). https://doi.org/10.1007/BF00151613

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  • DOI: https://doi.org/10.1007/BF00151613

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