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Table 1

Sample origin.

# Reference Type of survey Number of stars

1 Sousa et al. (2008) F-G-K stars, old, not very active, exoplanet survey 294
2 Ramírez et al. (2014) Solar twins, old and young stars 64
3 Marsden et al. (2014) Solar-type stars, old and young (Bcool survey) 31
4 Datson et al. (2014) Solar twins 5
5 Borgniet et al. (2017) F stars, old stars, exoplanet survey 6
6 Lagrange et al. (2013) Young stars, exoplanet survey 8
7 Gray et al. (2015) Young solar twins 4

Notes. Number of stars retrieved from these surveys to build our sample.

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