Table 1.
Parameters adopted for the Tucana dSph.
| Parameter | Units | Value | Ref. |
|---|---|---|---|
| αJ2000 |
 |
(1) | |
| δJ2000 | −64 ° 25′10″ | (1) | |
| ϵ(a) | 0.48 ± 0.03 | (2) | |
| PA | deg | 97 ± 2 | (2) |
| Rcore | arcmin (pc) | 0.7 ± 0.1 (955 ± 139) | (2) |
| Rtidal | arcmin (pc) | 3.7 ± 0.5 (181 ± 28) | (2) |
| Re | arcmin (pc) | 0.8 ± 0.1 (206 ± 28) | (2) |
| LV | 105 M⊙ | 5.5 ± 1.5 | (2) |
| ITRGB | 20.7 ± 0.15 | (2) | |
| E(B − V) | 0.031 | (3) | |
| D⊙ | kpc | 887 ± 49 | (3) |
 |
km s−1 | 180 ± 1.3 | (4) |
| σv | km s−1 | 6.2 |
(4) |
| [Fe/H] | dex | −1.58 | (4) |
| σ[Fe/H] | dex | 0.39 | (4) |
Notes. The table lists: the coordinates of the galaxy’s optical center; the ellipticity; the position angle; the core, tidal and half-light geometric radii; the stellar luminosity in V-band; the tip of the red giant branch magnitude in I-band; the average reddening; the heliocentric distance; the chemo-kinematic parameters obtained in this work, i.e., the systemic velocity, the velocity dispersion, the median metallicity, and the intrinsic metallicity scatter.
References. (1) Lavery & Mighell (1992); (2) Saviane et al. (1996); (3) Bernard et al. (2009); (4) this work.
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