Abstract
The analysis of seventeen spectra of the Bp He-weak star HD 125823 recorded by the SWP camera on board the International Ultraviolet Explorer reveals no variations of the far-ultraviolet spectral energy distribution of this star over a time interval of three years. However line variations are present in the range 1400 up to 1600 Å which can be partly attributed to variations of lines of Si ii and Si iii. This confirms that silicon is not distributed in a uniform manner over the surface but the horizontal gradients of the silicon abundance are probably not large.
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