Abstract
ABSTRACTWe present Far Ultraviolet Spectroscopic Explorer (FUSE) observations of the magnetic cataclysmic variable V405 Aurigae. Together with four other DQ Her–type binaries, V405 Aur forms a small subclass of intermediate polars that are likely to evolve into low magnetic field strength polars, similar to AM Her. Our co‐added FUSE spectrum exhibits broad O vi and C iii emission lines, in addition to a narrow O vi emission‐line component that likely forms near the white dwarf surface. The O vi λ1032/λ1038 narrow emission‐line flux ratio is near 2.0 throughout the orbit, which is indicative of its formation in an optically thin gas. Radial velocity measurements of the narrow O vi emission lines restrict any orbital modulation to a very low amplitude (KWD = 2.5 ± 0.5 km s−1), indicating, along with other single‐peaked broad disk emission lines in the UV and optical, that the binary system is at low inclination.
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