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Paper: O IV fluorescence in the symbiotic nova RR Tel
Volume: 261, The Physics of Cataclysmic Variables and Related Objects
Page: 659
Authors: Selvelli, P.; Bonifacio, P.
Abstract: UVES data of RR Tel show an exceeding emission intensity in the O IV lines of the optical multiplets 1, 2, 3 and 6 as compared with other lines of similar excitation potential and laboratory intensity. We suggest that a new fluorescence mechanism, in which the He II recombination line at λ 237.33Å pumps the O IV EUV lines near λ 238.4 Å, may explain the excitation of multiplets 2 and 1.
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