Table 1.
MW and M31 properties.
| LG realisation | 9_18 | 17_11 | ||
|---|---|---|---|---|
| Galaxy | MW | M31 | MW | M31 |
| R200 (kpc) | 254 | 262 | 255 | 269 |
| M200 (1012 M⊙) | 1.88 | 2.06 | 1.89 | 2.23 |
| Mgas (1010 M⊙) | 15.1 | 14.7 | 10.5 | 16.3 |
| M★ (1010 M⊙) | 10.8 | 12.8 | 11.4 | 12.6 |
| fgas | 0.08 | 0.071 | 0.056 | 0.073 |
| f★ | 0.057 | 0.062 | 0.06 | 0.057 |
| vrad (km s−1) | −74 | −102 | ||
| d (kpc) | 866 | 675 | ||
| rmax (kpc) | 50 | 50 | ||
| zmax (kpc) | 8 | 8 | ||
| vdev (km s−1) | 100 | 100 | ||
Notes. Main properties of the MW and M31 galaxy candidates for the two HESTIA high-resolution runs studied in this work. From top to bottom: the distance where the mass density profile of haloes equals 200 times the critical density of the Universe, R200; the total, gas and stellar masses within R200; the relative radial velocity, vrad, and distance, d, between MW and M31. The last three rows show the parameters chosen to filter out the gaseous discs of the galaxy candidates using the method presented in Section 3.2.
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