Fig. 13.

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7Be yields measured in classical and recurrent novae from an analysis of the near-UV 7Be II 313.0 nm line (blue data). The plot shows the atomic ratio of 7Be to H: N(7Be) =logN(7Be)/N(HI)+12, on the y-axis. For V1369 Cen, the yield measured from the 478 keV line is N(7Be) = 7.1 (red data), whereas the value, adjusted for the new Gaia distance, from the optical data (Schaefer 2022) is N(7Be) = 6.5 ± 0.4 (orange data). This latter value is lower by 0.6 dex compared to the 478 keV analysis but still falls within the margin of error. The dashed line indicates the average value (±1σ), derived from the entire sample of novae. The grey area represents the theoretical predictions from various models (Jose & Hernanz 1998; Rukeya et al. 2017; Starrfield et al. 2020).
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