Soft X-ray, EUV and far-UV studies of hot white dwarfs

Astronomy and Astrophysics – Astrophysics

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Faint Blue Stars, White Dwarfs, Degenerate Stars, Nuclei Of Planetary Nebulae, Astronomical And Space-Research Instrumentation

Scientific paper

The systematic study of the properties of the structure and evolution of hot white dwarfs owes a tremendous debt to space borne astronomy. At the temperature and densities found in these stars, observations in visible light generally only reveal evidence of the most abundant photospheric elements, hydrogen or helium. Access to spectral windows ranging from the far UV, through the EUV and into the soft X-ray band reveals a much more complex picture of trace heavy element opacity in the stellar atmospheres and interstellar absorption than could ever have been deduced from ground-based measurements alone. Moreover, many of the spacecraft responsible for these results would fall within the `Small Mission' category. This review discusses the legacy of IUE, the ROSAT Wide Field Camera and EUVE, among others, outlining the need for small and medium Explorer Class missions.

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