Table 1.
Parameter definitions.
| Symbol [Unit] | Definition |
|---|---|
| Re | The radius containing half of the stellar mass M*, 30 kpc in the cylindrical coordinate. |
| hR | The disk scale length, derived as described in Apppendix A. |
| C82 | The ratio of the cylindrical radius containing 80% of the stellar mass, R80, to the cylindrical radius containing 20% of the stellar mass, R20. |
| Σ1 kpc, ΣRe [M⊙/kpc2] | The surface stellar mass density measured within 1 kpc (Re). |
| κrot | The stellar kinetic energy fraction in ordered rotation of all stellar particles (Sales et al. 2010), ∑mvϕ2/∑mv2, where m, vϕ, and v are mass, azimuthal velocity, and total velocity of each stellar particle. |
| fgas | The mass ratio between cold gas (HI + H2) and M*. (a) |
| fBH | The mass ratio between the black hole and M*. |
| fbaryon | The baryonic mass ratio, Mbaryon/Mtot. |
| Z* | The stellar metallicity. |
| SFR [M⊙/yr], (sSFR [Gyr−1]) | The (specific) star formation rate. |
| fex situ | The ex situ mass ratio. (b) |
| fbulge, fdisk, fhalo | The mass ratios of kinematically derived bulges, disks, and stellar halos in galaxies. fhalo + fdisk + fbulge = 1 in each galaxy. (c) |
| λ* | The dimensionless stellar spin parameter,  , defined based on the j* − M* relation of disk galaxies from TNG simulations measured by Du et al. (2022, 2024) in order to remove the dependence on M*. |
| c200 | The dark matter halo concentration, c200 = r200/r−2, where r200 is the viral radius and r−2 is the scale radius, derived from fitting the halo density profile by the Einasto (1965) profile. |
Notes. These parameters are measured for all particles of a SUBFIND galaxy in the face-on view within a cylindrical coordinate system. No radial limit is imposed, with the exception of κrot,30 kpc.
Cold gas mass from Diemer et al. (2018, 2019).
The ex situ mass from Rodriguez-Gomez et al. (2016).
kinematically derived components from Du et al. (2019, 2020).
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