Evolution of a system with a damping factor of K = 50 where the pebble flux is twice as large as in Fig. 2. The lines have the same meaning as in Fig. 2. Due to the massive planets, an instability already occurs during the gas phase of the disc, increasing the eccentricity of the planets. However, during the remaining gas phase of 1.5 Myr after the instability, the eccentricities of the planets get damped efficiently and the two inner planets have eccentricities of around 0.1.
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