Table 2.
Statistics for present-day satellite galaxies’ characteristic lookback times in Gigayears ago (Gya).
| Lookback times (Gya) |
|||
|---|---|---|---|
| Event | Median | 50% range | 90% range |
| Sat | 9.4 [1.46] | 6.0–12.7 | 1.8–13.2 |
| Cent | 5.3 [0.52] | 2.8–7.9 | 0.4–9.6 |
| Infall | 5.1 [0.48] | 2.7–7.5 | 0.7–9.0 |
| Acc | 4.0 [0.35] | 1.8–6.7 | 0.2–8.5 |
| m⋆, max | 1.5 [0.11] | < 4.8 | < 7.0 |
| msub, max | 6.1 [0.63] | 3.3–8.4 | 0.4–9.7 |
| mgas, max | 8.2 [1.07] | 6.2–9.7 | 2.1–10.7 |
Notes. Brackets show redshifts corresponding to the quoted lookback times. Times are, from top to bottom: sat: first time as a satellite (see text for caveats), cent: last time as a central, infall: first time labelled as a satellite of current host, acc: definitively labelled as a satellite of current host. We also list the times of maximum stellar, subhalo (i.e. total), and gas masses.
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