The Behavior of Bp He-weak Stars in the far-UV-Paper VIII: HD 131120

The analysis of four spectra of the B8 He-weak star HD 131120 recorded by the SWP camera on board the International Ultraviolet Explorer reveals low amplitude variations of the far-ultraviolet spectral energy distribution shortwards of 1500 Å over about half its rotational period in 1984. Silicon must be distributed in a non uniform manner over the surface of HD 131120 so as to modulate the FUV flux over the rotational period. This confirms the results of earlier investigations based on phase resolved high resolution optical spectra.