Free-free quasi-molecular absorption and satellites in Lyman-alpha due to collisions with H and H^+^.

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Line: Profiles, Stars: White Dwarfs, Atomic Data

Scientific paper

We present new theoretical calculations of the total line profiles of Lyman α including both red and blue far wings. All the transitions involved due to H-H and H-H^+^ collisions are taken into account and weighted by their dipole transition moments. The resulting profile shows a number of satellite features, at least two of which have been observed in ultraviolet spectra of hydrogen-rich white dwarfs.

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