Extended Data Fig. 5: The correlation between ΓR and α is robust against the choice of the fine-regolith macroporosity.
From: Fine-regolith production on asteroids controlled by rock porosity
The results for macroporosity φ = 15% and φ = 60% have Spearman correlation coefficients 0.56 ± 0.06 and 0.58 ± 0.06, probability of non-correlation P < 0.05, and are within 3 standard deviations of the best-fit values for regolith macroporosity of φ = 40% in 99% and 92% of the cases, respectively. The correlations are robust against removing the areas whose solutions are statistically distinct from the data set with macroporosity φ = 40% (Spearman correlation index: 0.55 ± 0.07 and P < 0.05 in 100% of 10,000 trials). The error bars correspond to 1 standard deviation (Supplementary Table 1; Methods) computed on ~450 and ~880 samples on average. The results for a regolith macroporosity of φ = 40% are described in the main text (Fig. 1).
