Fig. 4
Comparison of sections of the STIS spectra with our models for G191−B2B (top) and RE 0503−289 (bottom). The Al abundances are 1.1 × 10-5 (0.2 times the solar value, Rauch et al. 2013) and 5.3 × 10-5 (solar), respectively. In the top part, the green dashed line is a spectrum calculated without Al. Prominent lines are marked, the identified Al iii lines with their wavelengths.
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