Quasi-molecular lines in Lyman wings of cool DA white dwarfs: Application to FUSE observations of G231-40

Details Quasi-molecular lines in Lyman wings of cool DA white dwarfs: Application to FUSE observations of G231-40 Quasi-molecular lines in Lyman wings of cool DA white dwarfs: Application to FUSE observations of G231-40

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002sf2a.conf..527h&link_type=abstract

SF2A-2002: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 24-29, 2002, Eds.: F. Combes and D. Barret,

Astronomy and Astrophysics

Astrophysics

Scientific paper

Comprehensive, calculations of the Lyman-alpha and Lyman-beta line wings which include perturbations by both neutral hydrogen and protons and all possible quasi-molecular states of H2 and H2+ are used to predict synthetic spectra for cool DA white dwarfs. They are compared with FUSE observation of G231-40. The appearance of the line wings between Lyman-alpha and Lyman-beta is shown to be sensitive to the relative abundance of hydrogen ions and neutral atoms, and thereby to provide a temperature diagnostic for stellar atmospheres and laboratory plamas.

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