Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-28T21:33:55.662Z Has data issue: false hasContentIssue false
  • English
  • Français

Computation of Infrared Hydrogen Lines

Published online by Cambridge University Press:  03 August 2017

Mats Carlsson  and
Robert J. Rutten
Mats Carlsson
Affiliation:
Institute of Theoretical Astrophysics, P.O. Box 1029, Blindern, N–0315 Oslo 3, Norway
Robert J. Rutten
Affiliation:
Sterrekundig Instituut, Postbus 80 000, NL–3508 TA, Utrecht, The Netherlands

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We compare infrared hydrogen lines observed with ATMOS with computations for two models of the solar atmosphere, one without and one with a chromosphere. The weaker H I lines are formed in the photosphere. Proper evaluation of Stark broadening is required to reproduce their profiles; the heavy ion contribution is most important. The cores of the stronger lines are sensitive to the structure of the chromosphere, but detailed NLTE modeling is needed for diagnostic applications.

Keywords

atomic processeshydrogeninfrared: starsline: formationline: profilesSun: atmosphere
Type
Part 4: Infrared Atomic Physics and Line Formation
Information
Symposium - International Astronomical Union , Volume 154: Infrared Solar Physics , 1994 , pp. 341 - 346
Copyright
Copyright © Kluwer 1994 

References

Avrett, E. H.: 1993, in these proceedings.Google Scholar
Boreiko, R. T. and Clark, T. A.: 1986, Astron. Astrophys. 157, 353.Google Scholar
Brault, J. and Noyes, R.: 1983, Astrophys. J. 269, L61.Google Scholar
Carlsson, M. and Rutten, R. J.: 1992, Astron. Astrophys. 259, L53.Google Scholar
Carlsson, M., Rutten, R. J., and Shchukina, N. G.: 1992a, Astron. Astrophys. 253, 567.Google Scholar
Carlsson, M., Rutten, R. J., and Shchukina, N. G.: 1992b, in Giampapa, M. S. and Bookbinder, J. A. (Eds.), Cool Stars, Stellar Systems, and the Sun, Proc. Seventh Cambridge Workshop, ASP Conf. Series, 26, p. 518.Google Scholar
de Jager, C.: 1964, in Migeotte, M. (Ed.), Les Spectres Infrarouges des Astres, Coll. Int. Liège, Mém. 8° Soc. Roy. Sci., Liège, p. 151.Google Scholar
de Jager, C., Migeotte, M., and Neven, L.: 1956, Ann d'Astrophys. 19, 9.Google Scholar
de Jager, C. and Neven, L.: 1950, Proc. Kon. Ned. Akad. Wetensch. 53, 1578.Google Scholar
Edvardsson, B., Gustafsson, B., Lambert, D. L., Nissen, P. E., Tomkin, J., and Andersen, J.: 1993, Astron. Astrophys., in press.Google Scholar
Farmer, C. B. and Norton, R. H.: 1989, A High-Resolution Atlas of the Infrared Spectrum of the Sun and the Earth Atmosphere from Space, NASA Ref. Publ. 1224, Vol. 1.Google Scholar
Magain, P.: 1986, Astron. Astrophys. 163, 135.Google Scholar
Maltby, P., Avrett, E. H., Carlsson, M., Kjeldseth-Moe, O., Kurucz, R. L., and Loeser, R.: 1986, Astrophys. J. 306, 284.Google Scholar
Rutten, R. J. and Carlsson, M.: 1993, in these proceedings.Google Scholar
Zirker, J. B.: 1985, Solar Phys. 102, 33 Google Scholar