Table 1.
Compact group identification criteria and number of compact groups identified in each sample.
| Population | BGG flux | Compactness | Isolation | Velocity | ||
|---|---|---|---|---|---|---|
| N ≥ 3 | rb < rblim | μ ≤ μlim | ΘI ≥ 3ΘG | ΔV ≤ Vlim | ||
| N ∈ Δm | rblim = rlim − Δm | N ∈ Δm | ||||
| Δm | rlim ; rblim | μlim | Δm | Vlim | NCG | |
| Z+22 | 3 | 17.77 ; 14.77 | 26.33 | 3 | 1000 | 1412 |
| m3V10 | 3 | 19.70 ; 16.70 | 26.33 | 3 | 1000 | 467 |
| m3V5 | 3 | 19.70 ; 16.70 | 26.33 | 3 | 500 | 438 |
| m2V5 | 2 | 19.70 ; 17.70 | 26.33 | 2 | 500 | 759 |
| m1V5 | 1 | 19.70 ; 18.70 | 26.33 | 1 | 500 | 612 |
| m0V5 | None | 19.70 ; 19.70 | 26.33 | All | 500 | 2356 |
| ZS+20 | None | 17.77 ; 17.77 | 26.00 | All | 1000 | 6144 |
Notes. N is the number of galaxy members; rb is the apparent magnitude of the brightest galaxy; ΘG is the radius of the smallest circle that enclosed all galaxy members; ΘI is the isolation radius for the nearest non-member galaxy within Δm; and NCG is the total number of CGs in each sample. Acronyms for previous works: Z+22 (Zandivarez et al. 2022) and ZS+20 (Zheng & Shen 2020). Units: μlim is in mag arcsec−2, while Vlim is in km s−1
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