The influence of photoionization on shock wave emission in Fe XXV and Fe XXVI ion resonance transitions during collisions of rapid circumstellar flowsстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The emission in the resonance lines of hydrogen- and helium-like iron ions behind a shock front is calculated assuming total radiative cooling behind the front. The calculations are performed for velocities of the unperturbed gas relative to the front 4000 km/s < u_0 < 15 000 km/s. The density of the unperturbed gas is taken to be that typical for circumstellar flows in close binary systems. The calculations take into account the ionization of the material flowing into the front by hard radiation from the hot gas that has passed through the front. The recombination radiation of the inflowing material grows as the gas velocity increases, and exceeds the line emission of the gas behind the front when u_0 > 6000 km/s. Relevance of the results for the close binary system SS 433 is discussed.