Skip to main content
SpringerLink
Log in

A model of a penumbral chromosphere

  • Published:
Solar Physics Aims and scope Submit manuscript

Abstract

A semi-empirical model of a penumbral chromosphere is presented which represents a specific region of the penumbra located approximately one-fourth the distance outward from the umbra-penumbra interface. The model is based on simultaneous observations of high-resolution spectra of Caii K, H, and λ8498 made over a sunspot penumbra (SPO 5007) with the Echelle Spectrograph at the Vacuum Tower Telescope at Sacramento Peak Observatory on 18 December, 1979.

Spectral profiles were calculated using a non-LTE line formation procedure with various chromospheric models where the optimum model is determined by matching the synthesized profiles with the observational features. The best fit yields a model with overlying column mass m 0 of 8 × 10−6 g cm−2 which also agrees with the observed K3/H3 intensity ratio of 1.22.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • 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 

  • Beebe, H. A., Baggett, W. E., and Yun, H. S.: 1982, Solar Phys. 79, 31.

    Google Scholar 

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

    Google Scholar 

  • Dere, K. P., Bartoe, J. D. F., and Breuckner, G. E.: 1982, Astrophys. J., submitted for publication.

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

    Google Scholar 

  • Kneer, F. and Mattig, W.: 1978, Astron. Astrophys. 65, 17.

    Google Scholar 

  • Kneer, F., Mattig, W., and v. Uexkull, M.: 1981, Astron. Astrophys. 102, 147.

    Google Scholar 

  • Labs, D. and Neckel, H.: 1968, Z. Astrophys. 69, 1.

    Google Scholar 

  • Lites, B. W. and Skumanich, A.: 1982, Astrophys. J. Suppl. 49, 293.

    Google Scholar 

  • Nicolas, K. R., Kjeldsethmoe, O., Bartoe, J. F., and Brueckner, G. E.: 1981, Solar Phys. 81, 253.

    Google Scholar 

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

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

    Google Scholar 

  • White, O. R. and Suemoto, Z.: 1968, Solar Phys. 4, 523.

    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. E.: 1980, J. Korean Astron. Soc. 13, 1.

    Google Scholar 

  • Yun, H. S., Beebe, H. A., and Baggett, W. E.: 1982, Proc. SW Reg. Conf. Astron. Astrophys. 8, 31.

    Google Scholar 

Download references

Author information

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 & W. E. Baggett

Authors
  1. H. S. Yun
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. H. A. Beebe
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. W. E. Baggett
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

This work was supported by the US-Republic of Korea Cooperative Science Program (K-53).

Rights and permissions

Reprints and permissions

About this article

Cite this article

Yun, H.S., Beebe, H.A. & Baggett, W.E. A model of a penumbral chromosphere. Sol Phys 92, 145–151 (1984). https://doi.org/10.1007/BF00157241

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00157241

Keywords

Search

Navigation