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Table 1.
Pismis 18 basic parameters.
| Property | WEBDA | Piatti et al. (1998) | Tadross (2008) | Kharchenko et al. (2013) | Cantat-Gaudin et al. (2018a) | Present study |
|---|---|---|---|---|---|---|
| RA (J2000) | 13:36:55 | 13:36:32 (a) | 13:36:56 | 13:36:55.8 | 13:36:54.5 | 13:36:58.1 |
| Dec (J2000) | −62:05:36 | −62:12:48 (a) | −62:05:45 | −62:03:54 | −62:05:28 | −62:05:35 |
| D (kpc) | 2.24 | 2.24 ± 0.41 | 1.79 ± 0.08 | 2.3 | 2.77 (b) |  |
| RGC (kpc) | − | 7.53 | − | 6.8 ± 0.1 (d) | ||
| z (pc) (c) | 15.1 | 13 ± 2 | ||||
| Radius (arcmin) | − | 5.6 | − | 2.88 (e) | ≃5 | |
| Age (Gyr) | 1.2 ± 0.4 | 0.8 | 0.94 |  |
||
| E(B − V) | 0.50 | 0.50 ± 0.05 | 0.61 | 0.52 |  |
|
| [Fe/H] | 0.0 | − | − | 0.23 ± 0.05 dex |
Notes.
(d)
The adopted distance of the Sun to the Galactic Centre is eight kpc (see Malkin et al. 2013).
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