The discovery of photospheric phosphorus and iron in the Far Ultraviolet Spectroscopic Explorer spectrum of the hot DA white dwarf GD 394

We report the discovery of the photospheric P V 3s(S-2)-3p(P-2(o)) transiti ons and Fe III 3d(6)(D-5)-3d(5)(S-6)4p((5)p(o)) transitions detected in the far-UV spectrum of the hot hydrogen-rich white dwarf GD 394. The spectrum was obtained with the Far Ultraviolet Spectroscopic Explorer using the larg e aperture. The spectrum covers a wavelength range of 910-1180 Angstrom at a resolution of lambda/Delta lambda similar to 15,000. The presence of phot ospheric phosphorus and iron is the first hi-ill detection of heavy element s other than silicon in the photosphere of GD 394, This detection confirms Extreme Ultraviolet Explorer observations, which show evidence of heavy ele ments in the photosphere of GD 394 with relatively low individual abundance s. The spectrum reveals also a host of photospheric Si III and Si IV featur es.