In this high S/N FUSE spectrum of IX Vel, the sharp absorption lines are all observed at their theoretical rest wavelengths, while the broad absorption lines are blue shifted by about 2A and exhibit a sharp steep red wing and a much broader blue wing. All the broad absorption lines are associated with the source and have been marked on the figure at the rest wavelength such that the blue shift is evident. All the sharp absorption lines are from the ISM, except possibly for the nitrogen lines (terrestrial). Processing of the FUSE spectrum is given in Linnell et al. (2007) together with a spectral modeling of the FUSE spectrum combined with a STIS and IUE spectra.

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FUSE Data

Synthetic Spectrum

Click to see larger version of the plot

These data and models were published in the paper:

Linnell, A., Godon, P., Hubeny, I., Sion, E.M., Szkody, P. 2007, ApJ, 662, 1204

Notes on figures:

When a model is shown, the portions of the observed spectrum that have been masked before the spectral fit are in blue, while the rest of the observed spectrum is in red. The model fit is shown the solide line in black (or possibly white). If the model is a composite made of a disk model and a white dwarf model, then these are shown with the dashed- and dotted lines (respectively). Some models include the effect of quasi-molecular HI absorption features, these are labelled "Q-mol" in the spectrum.