Research to be reviewed related to the formation scenarios in these planet formation convections cells processes:
Rapid formation of exoplanetesimals revealed by white dwarfs
“By simulating planetesimal evolution and collisional evolution, we show that the most likely heat source is short-lived radioactive nuclides such as 26Al (which has a half-life of ~0.7 Myr). Core-rich materials in the atmospheres of white dwarfs, therefore, provide independent evidence for rapid planetesimal formation, concurrent with star formation.”
https://www.nature.com/articles/s41550-022-01815-8
Amy Bonsor, Tim Lichtenberg, Joanna Dra̧żkowska & Andrew M. Buchan
Citation: Bonsor, A., Lichtenberg, T., Dra̧żkowska, J. et al. Rapid formation of exoplanetesimals revealed by white dwarfs. Nat Astron (2022). https://doi.org/10.1038/s41550-022-01815-8