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The ionization state of the winds from cataclysmic variables without classical boundary layers
(1993)
We have calculated a grid of detailed photoionization models for the stellar winds in non-magnetic cataclysmic variables. In the light of evidence which questions the existence of a classical hot, luminous boundary layer ...
Excited hydrogen and the formation of molecular-hydrogen via associative ionization. 1 : Physical processes and outflows from young stellar objects
(1993)
Rates for the associative ionization reaction H(n=2)+H→H2++e- are calculated. This reaction is found to be a greater contributor to the H2 formation rate than the direct radiative association reaction H(n=2)+H→H2+hν in ...
The donor star of the long-period dwarf nova DX-Andromedae
(1993)
Spectroscopic observations of the long-period dwarf nova DX Andromedae are reported which show that it has a binary period of 0.44167 d, a secondary radial velocity amplitude of 107 km/s, and a projected rotational velocity ...
The 1st measurement of the Lyman continuum emission from normal stars
(1993)
We report the first measurements of Lyman continuum emission from non-degenerate stars. The Wide Field Camera on-board ROSAT detected strong emission from Beta CMa (B1 II-III) and Epsilon CMa (B2 II). Both Kurucz LTE ...