FAINT OBJECT SPECTROGRAPH SPECTRA OF THE BROAD FE-II ABSORPTION-LINESIN THE REMNANT OF SN-1006

Ultraviolet spectra of a hot subdwarf star located behind the remnant of SN 1006 have been obtained with the Faint Object Spectrograph on th e Hubble Space Telescope. The FOS UV spectra show strong and extremely broad Fe II lambda2343, lambda2374, lambda2382, lambda2586, and lambd a2599 lines in absorption from the supernova remnant, confirming an ea rlier detection with the International Ultraviolet Explorer. The bette r resolution and signal-to-noise of the FOS spectra allow for the remo val of narrow interstellar and stellar lines and the deblending of the broad Fe II lines, resulting in an intrinsic Fe II profile suitable f or detailed comparison with model predictions. The velocity profile of the ejecta is approximately symmetric around 0 km s 1 and extends up to +/-8300 km s-1 at the continuum. The absorption-line width and angu lar size of the remnant yield a lower limit of 1.9 kpc to the distance of the remnant. The remnant contains approximately 0.014 M . of Fe+.