Table 1.
Sample UDGs and their properties.
| Name | d [kpc] | dmean [kpc] | L [108 L⊙] | Re [kpc] | n | M/L [M⊙/L⊙] | σeff [km s−1] |
|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
| DF44 (a) | 1809.0 | 2336.2 | 3.0 | 4.7 | 0.85 | 1.3 ( † ) | 33 ± 3 |
| DFX1 (a) | 1457.1 | 1994.9 | 1.9 | 3.6 | 0.90 | 1.3 ( † ) | 30 ± 7 ( † ) |
| J125848.94+281037.1 (b) | 523.9 | 1129.3 | 0.38 | 1.5 | 0.95 | 1.32 ± 0.16 | 18 ± 13 |
| J125904.06+281422.4 (b) | 534.9 | 1138.7 | 0.43 | 1.4 | 0.76 | 1.48 ± 0.40 | 25 ± 7 |
| J125904.20+281507.7 (b) | 553.1 | 1154.4 | 0.46 | 1.6 | 1.36 | 1.41 ± 0.11 | 17 ± 10 |
| J125929.89+274303.0 (b) | 475.3 | 1088.0 | 1.2 | 2.9 | 1.21 | 1.14 ± 0.25 | 21 ± 7 |
| J125937.23+274815.2 (b) | 317.0 | 960.2 | 0.40 | 1.8 | 1.81 | 1.45 ± 0.12 | 22 ± 8 |
| J130005.40+275333.0 (b) | 187.6 | 867.8 | 0.82 | 1.8 | 0.99 | 0.73 ± 0.11 | 37 ± 6 |
| J130026.26+272735.2 (b) | 940.9 | 1504.6 | 3.6 | 3.7 | 1 ( † ) | 0.37 ± 0.02 | 19 ± 5 |
| J130028.34+274820.5 (b) | 397.7 | 1023.9 | 0.71 | 2.1 | 1.37 | 0.79 ± 0.12 | 23 ± 7 |
| J130038.63+272835.3 (b) | 937.0 | 1501.0 | 1.5 | 1.9 | 1 ( † ) | 0.41 ± 0.03 | 27 ± 5 |
Notes. (1) Name of the UDG, as reported by (a)van Dokkum et al. (2015a, 2016, 2017, 2019b), (b)Chilingarian et al. (2019). (2) Projected distance from the centre of the Coma cluster. (3) Average distance from the centre inferred from the Einasto distribution from van der Burg et al. (2016, cf. Sect. 4.1). (4) Stellar luminosity, in the I-band for DF44 and DFX1, and in the R-band for the others. (5) and (6) Projected half-light radius and Sérsic index from I- or R-band fits. A Sérsic index n = 1 is assumed for two UDGs identified by Chilingarian et al. (2019, marked by a dagger). (7) Stellar mass-to-light ratio in I- or R-band, taken to be 1.3 for the first two UDGs (marked by a dagger) and derived from fitting the spectrum with single stellar population models by Chilingarian et al. (2019) for the others. (8) Effective stellar velocity dispersion within the de-projected half-light radius or, when not available, central stellar velocity dispersion (marked by a dagger).
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