Online material

Appendix A: Properties of compact groups and galaxy groups

In Table A.1 we list the group IDs of compact groups identified by Díaz-Giménez et al. (2012) that have been used in this work. The list includes only the 63 compact groups with radial velocities higher than 3000 km s^-1 and within the sky coverage of the 2M++ catalogue. The complete catalogue is available at VizieR – cat. J/MNRAS/426/296.

In Table A.2 we quote the median and semi-interquartile ranges of several properties of observational and mock compact groups, split into different subsamples.

In Table A.3 we quote the median and semi-interquartile ranges of several properties of observational and mock galaxy groups, split into different subsamples.

Appendix B: Group catalogue with δρ/ρ = 433

In this section we quote the content of the tables of galaxy groups identified in the 2M++ catalogue using a contour overdensity contrast of 433. In Table B.1 we show part of the table containing the 813 galaxy groups, while Table B.2 shows also part of the table that quotes the information for the 4869 galaxy members.

© ESO, 2015