Table 2.
1D and 2D stellar kinematics and dynamical masses of UDGs and LSBs in the Hydra I cluster.
| Object | λ range | S/N | Fit Type | Vsys | σeff | Type | Vrms | Mdyn | log10(Mdyn/LV, eff) | ΔV | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| [Å] | [km s−1] | [km s−1] | [km s−1] | [109 M⊙] | [M⊙/L⊙] | [km s−1] | |||||
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | |
| UDG1 | 4800–7000 | 32 | C | 4187 ± 4 | 23 ± 6 | R | 40 ± 18 | 2.28 ± 2.06 | 1.62 ± 0.39 | 44 ± 8 | |
| UDG3 | 4800–7000 | 15 | I | 3611 ± 14 | – | U | – | – | – | – | |
| UDG4 | 4800–8800 | 27 | C | 2306 ± 3 | 13 ± 6 | NR | – | 0.36 ± 0.33 | 0.70 ± 0.40 | 18 ± 6 | |
| UDG7 | 4800–7000 | 17 | C | 4126 ± 5 | 61 ± 9 (*) | R | – | 4.91 ± 1.51 (*) | 2.69 ± 0.13 (*) | 41 ± 21 | |
| UDG8 | 4800–8800 | 37 | C | 4727 ± 2 | 24 ± 4 | IR | 24 ± 3 | 0.51 ± 0.14 | 1.20 ± 0.12ì | 20 ± 2 | |
| UDG9 | 4800–7000 | 19 | C | 4269 ± 4 | 21 ± 7 | NR | – | 1.04 ± 0.70 | 1.44 ± 0.29 | 8 ± 5 | |
| UDG10 | 4800–7000 | 15 | I | 3660 ± 7 | – | NR | – | – | – | 18 ± 6 | |
| UDG11 | 4800–9000 | 16 | C | 3507 ± 3 | 20 ± 8 | NR | – | 0.59 ± 0.48 | 1.33 ± 0.35 | 7 ± 13 | |
| UDG12 | 4800–8900 | 24 | C | 4585 ± 3 | 38 ± 9 (*) | IR | – | 1.86 ± 0.89 (*) | 2.08 ± 0.21 (*) | 41 ± 21 | |
| UDG13 | 4800–7000 | 9 | U | 3425 ± 11 | – | – | – | – | – | – | |
| UDG15 | 4800–7000 | 8 | U | 3625 ± 12 | – | – | – | – | – | – | |
| UDG20 | 4800–7000 | 11 | I | 4697 ± 6 | – | U | – | – | – | – | |
| UDG21 | 4800–7000 | 10 | I | 3460 ± 112 | – | U | – | – | – | – | |
| UDG22 | 4800–7000 | – | – | 5198 | – | – | – | – | – | – | |
| UDG23 | 4800–7000 | 14 | I | 3477 ± 8 | – | U | – | – | – | – | |
| LSB1 | 4800–7000 | 11 | I | 4754 ± 16 | – | U | – | – | – | – | |
| LSB4 | 4800–7000 | 11 | I | 3296 ± 22 | – | U | – | – | – | – | |
| LSB5 | 4800–8900 | 26 | C | 3386 ± 2 | 25 ± 7 | NR | – | 0.58 ± 0.33 | 1.75 ± 0.25 | 3 ± 4 | |
| LSB6 | 4800–8900 | 35 | C | 5150 ± 2 | 28 ± 5 | R | 30 ± 13 | 2.41 ± 2.25 | 1.68 ± 0.41 | 32 ± 5 | |
| LSB7 | 4800–8900 | 47 | C | 3541 ± 1 | 14 ± 5 | IR | 21 ± 8 | 0.69 ± 0.52 | 1.06 ± 0.33 | 25 ± 2 | |
| LSB8 | 4800–8900 | 38 | C | 2715 ± 2 | 12 ± 6 | IR | 19 ± 7 | 0.46 ± 0.35 | 1.03 ± 0.33 | 20 ± 5 | |
Notes. Column 1 reports the target name of the galaxy in the LEWIS sample. Column 2 reports the wavelength range used to derive the stellar kinematics. Column 3 reports the average S/N of the spectrum. Column 4 reports the class of the fit: constrained (C), intermediate (I), and unconstrained (U). Columns 5 and 6 report the systemic velocity (Vsys) and the velocity dispersion derived inside 1Reff (σeff), respectively. Column 7 reports the class of the kinematic feature: rotation along the major photometric axis (R), rotation along an intermediate axis (IR), no rotation (NR), and unconstrained rotation (U). Column 8 reports the luminosity-weighted second velocity moment (Vrms) derived from the 2D stellar kinematics and used to compute the Mdyn in R and IR type galaxies. Columns 9 and 10 report the dynamical mass (Mdyn) and the logarithm of the dynamical mass-to-light ratio (Mdyn/LV, eff), respectively. For non-rotating galaxies, the value for Mdyn was calculated from σeff, and for rotating galaxies, the value of Mdyn was calculated from Vrms. Column 11 reports the semi-amplitude of the rotation curve ΔV.
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