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Theoretical study of the Lyman \(\gamma\) line profile of atomic hydrogen perturbed by collisions with protons

Lyman \(\gamma\) line profile

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Abstract.

The far wings of the Lyman series of atomic hydrogen exhibit satellites, enhancements that may be associated with quasi-molecular states of H2 and H+ 2. Quasi-molecular satellites in the red wings of Lyman \(\alpha\) and Lyman \(\beta\) were previously identified in the spectra of the DA white dwarfs. We present here new theoretical calculations of Lyman \(\gamma\) profiles perturbed by protons. They allow a large feature near 995 Å in UV spectra of hot white dwarfs to be identified. This feature is a blend of two quasi-molecular Lyman \(\gamma\) satellites due to H-H+ collisions near 992 Å and 996 Å.

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Authors and Affiliations

  1. Institut d’Astrophysique de Paris, CNRS, 98 bis boulevard Arago, 75014, Paris, France

    N. F. Allard & G. Hébrard

  2. Observatoire de Paris-Meudon, LERMA, 92195, Meudon Principal Cedex, France

    N. F. Allard

  3. Department of Physics, University of Louisville, KY 40292, Louisville, USA

    J. F. Kielkopf

  4. private addresse, 45 Puye, NM 87544, Los Alamos, USA

    J. M. Peek

Authors
  1. N. F. Allard
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  2. J. F. Kielkopf
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  3. G. Hébrard
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  4. J. M. Peek
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Corresponding author

Correspondence to N. F. Allard.

Additional information

Received: 1st July 2003, Published online: 17 February 2004

PACS:

32.70.Jz Line shapes, widths, and shifts

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Allard, N.F., Kielkopf, J.F., Hébrard, G. et al. Theoretical study of the Lyman \(\gamma\) line profile of atomic hydrogen perturbed by collisions with protons. Eur. Phys. J. D 29, 7–16 (2004). https://doi.org/10.1140/epjd/e2004-00016-4

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  • DOI: https://doi.org/10.1140/epjd/e2004-00016-4

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