Ultraviolet Variability of the Massive W-R Binary System HDE 311884 = WR 47
Moffat, Anthony F. J.; Koenigsberger, Gloria; Auer, Lawrence H.
Mexico, Canada, United States
Abstract
IUE observations and their analysis of the massive WN6 + O binary system HDE 311884 are presented. The phase-dependent variations are like those of WN4-6 binaries studied previously, with atmospheric eclipses evident in the N IV 1718 A and C IV 1550 A lines, and in the Fe V + VI pseudocontinuum at wavelengths below 1480 A. The considerable variability longward of 1700 A is due mostly to Fe II and Fe III lines.