SIMBAD references

2002A&A...394..647H - Astronomy and Astrophysics, volume 394647-651 (2002/11-1)

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

HEBRARD G., ALLARD N.F., HUBENY I., LACOUR S., FERLET R. and VIDAL-MADJAR A.

Abstract (from CDS):

We present new theoretical calculations of the total line profiles of Lyman α and Lyman β which include perturbations by both neutral hydrogen and protons and all possible quasi-molecular states of H2 and H2+. They are used to improve theoretical modeling of synthetic spectra for cool DA white dwarfs. We compare them with FUSE observation of G231-40. The appearance of the line wings between Lyman α and Lyman β 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 plasmas.

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Journal keyword(s): line: profiles - radiation mechanisms: general - stars: atmospheres - stars: individual: G231-40 - white dwarfs - ultraviolet: stars

Simbad objects: 4

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