Open Access

Table 1

Tests to check the validity of the correlation found in the bottom panel of Figure 15. The first column is the condition tested, the second and third are the Spearman rank correlation coefficients and associated log p-values, while the fourth and fifth columns are the Pearson rank correlation coefficients and associated log p-values. Green log p-values indicate p < 0.05, in which the result is statistically significant, while red values indicate the opposite.

Condition rs log(p) rp log(p)
All clusters 0.52 −2.4 0.65 −3.9
In situ removed 0.70 −3.5 0.71 −3.7
Only NGC 4590 removed 0.47 −1.9 0.59 −3.1
NGC 3201 and NGC 6101 removed 0.41 −1.5 0.45 −1.7
In situ, NGC 4590, NGC 3201 and NGC 6101 removed 0.53 −1.7 0.36 −0.8
NGC 4590, NGC 3201 and NGC 6101 removed 0.34 −1.0 0.27 −0.75

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.