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The chromosphere above a sunspot umbra

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Abstract

Spectra of several strong lines of sunspots have been obtained with the Echelle spectrograph at the Vacuum Tower Telescope, Sacramento Peak Observatory. With a variety of model atmospheres, Ca ii H, K, and λ18498 line profiles were calculated using a non-LTE line formation procedure.

In the present study we examined only a specific part of the sunspot umbra which is thought to be coolest over the spot. An optimum model representing such a region is presented and its physical properties are discussed.

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References

  • Athay, R. F. and Skumanich, A.: 1967, Ann. Astrophys. 30, 669.

    Google Scholar 

  • Auer, L. H., Heasley, J. N., and Milkey, R. W.: 1972, Kitt Peak National Observatory Contribution No. 555.

  • Beckers, J. N., Mauter, H. A., and Mann, G. R.: 1972, Solar Phys. 25, 81.

    Google Scholar 

  • Cheng, C. and Kjeldseth Moe, O.: 1977, Solar Phys. 52, 327.

    Google Scholar 

  • Foukal, P. V.: 1976, Astrophys. J. 210, 575.

    Google Scholar 

  • Gingerich, O., Noyes, R. W., Kalkofen, W., and Cunny, Y.: 1971, Solar Phys. 18, 347.

    Google Scholar 

  • Giovanelli, R. G., Harvey, J. W., and Livingston, W. C.: 1978, Solar Phys. 58, 347.

    Google Scholar 

  • Kneer, F. and Mattig, W.: 1978, Astron. Astrophys. 65, 18.

    Google Scholar 

  • Lites, B. W. and Skumanich, A.: 1982, Astrophys. J. Suppl. (in press).

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

    Google Scholar 

  • Nicolas, K. R., Kjeldseth Moe, O. Bartoe, J. F., and Brueckner, G. E.: 1982, Solar Phys. (in press).

  • Shine, R. A.: 1975, private communication.

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

    Google Scholar 

  • Shine, R. A. and Linsky, J. L.: 1974, Solar Phys. 39, 49.

    Google Scholar 

  • Shine, R. A. Milkey, R. W., and Mihalas, D.: 1975, Astrophys. J. 199, 724.

    Google Scholar 

  • Vernazza, J. E., Averett, E. H. and Loeser, R.: 1973, Astrophys. J. 184, 605.

    Google Scholar 

  • Yun, H. S. and Beebe, H. A.: 1982, Solar Phys. 78, 347.

    Google Scholar 

  • Yun, H. S., Beebe, H. A., and Baggett, W.: 1980, J. Korean Astron. Soc. 13, 1.

    Google Scholar 

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Authors and Affiliations

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

    H. A. Beebe & W. E. Baggett

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

    H. S. Yun

Authors
  1. H. A. Beebe
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  2. W. E. Baggett
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  3. H. S. Yun
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Additional information

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

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Beebe, H.A., Baggett, W.E. & Yun, H.S. The chromosphere above a sunspot umbra. Sol Phys 79, 31–39 (1982). https://doi.org/10.1007/BF00146971

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  • DOI: https://doi.org/10.1007/BF00146971

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