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Paper: Shifts of Ultraviolet Lines of Symbiotic Binaries
Volume: 435, Binaries – Key to Comprehension of the Universe
Page: 273
Authors: Friedjung, M.; Mikołajewska, J.; Zajczyk, A.; Eriksson, M.
Abstract: In a new study of UV emission lines of symbiotic binaries, we confirm the redshift of optically thick resonance lines of highly ionized atoms, compared with optically thin intercombination lines. We show that this is very probably due to P Cygni absorption on the short wavelength sides of the resonance lines usually with, lower velocity material in front of higher velocity material. Intercombination lines of more ionized atoms (especially of OIV]) appear to be also more redshifted with respect to corresponding lines from less ionized atoms. That might indicate downfall on to parts of an accretion disk.
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