Influence of companion composition on evaporation timescale. The contours of tev = 106yr (solid lines) and tev = 1012 yr (dashed lines) are represented as a function of companion distance a and size R for P = 10 ms, B = 108 G, and an indicative (and conservative) density ρ = 1 g cm-3, and for various companion refractive indices as indicated in the legend (increasing from right to left): σμ = 104−14 s-1, corresponding to Nr = 101−6.
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