FUSE studies of quasi-molecular satellites in the Lyman lines of white dwarfs

Details FUSE studies of quasi-molecular satellites in the Lyman lines of white dwarfs FUSE studies of quasi-molecular satellites in the Lyman lines of white dwarfs

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..348..200d&link_type=abstract

Astrophysics in the Far Ultraviolet: Five Years of Discovery with FUSE ASP Conference Series, Vol. 348, Proceedings of the Confe

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

We review FUSE observations of quasi-molecular lines detected in a wide variety of white dwarfs and recent progress made on the line-broadening theory. Quasi-molecular satellite transitions take place during close collisions of the radiating hydrogen atom with a perturbing atom or proton. These absorption features are present in the red wings of the Lyman series lines and provide a notable source of opacity in the hydrogen-rich atmospheres of white dwarfs. FUSE spectra have provided: 1) the first detection of the predicted H2 quasi-molecular satellite at 1150Å in ZZ Ceti, 2) detection of quasi-molecular satellites of Ly β and Ly γ in an ultra-massive white dwarf, 3) clear identification of the Ly γ quasi-molecular satellites, and 4) improved Ly β satellites opacities.

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