Top: The galaxy properties used to train the decision tree. In the second column, the aperture within which this quantity is calculated is noted. Here, total refers to the total bound mass to this subhalo. In this column, half-mass radius refers to the stellar half-mass radius. Bottom: The cluster properties associated with each galaxy. These are the properties of the cluster that the galaxy has backsplashed from or is falling into. The final column for both shows whether or not the value is pre-scaled logarithmically before its use in the decision tree. Note that this does not affect results, as the decision tree simply performs a set of bisections, but it does aid in the inspection of the results.
| Galaxy property . | Aperture . | Log? . |
|---|---|---|
| Total black hole mass | Total | |$\checkmark$| |
| Total black hole mass accretion rate | Total | |$\checkmark$| |
| Magnetic field strength in disc | Total | |$\checkmark$| |
| Magnetic field strength in halo | Total | |$\checkmark$| |
| Centre of mass | Total | × |
| Gas metal mass fractions for each species | Twice half-mass radius, half-mass radius, max radius, SF gas only | |$\checkmark$| |
| Gas total metallicity | Twice half-mass radius, half-mass radius, max radius, SF gas only | |$\checkmark$| |
| Galaxy half-mass radius (per species) | Total | |$\checkmark$| |
| Galaxy half-mass radius (total) | Total | |$\checkmark$| |
| Number of particles (per species) | Total | |$\checkmark$| |
| Number of particles (total) | Total | |$\checkmark$| |
| Total mass | Total, half-mass radius (per species, total), twice half-mass radius, max radius | |$\checkmark$| |
| Subhalo position in box | Total | |$\checkmark$| |
| Subhalo instantaneous SFR | Total, twice half-mass radius, max radius | |$\checkmark$| |
| Subhalo spin parameter κ | Total | |$\checkmark$| |
| Star metal mass fractions for each species | Twice half-mass radius, half-mass radius, max radius | |$\checkmark$| |
| Star total metallicity | Twice half-mass radius, half-mass radius, max radius, SF gas only | |$\checkmark$| |
| Magnitude in U, B, V, K, g, r, i, z bands | Total | × |
| Total mass within K-band half-light radius | Total | |$\checkmark$| |
| Half-light radius in K band | Total | |$\checkmark$| |
| 1D velocity dispersion of all member particles | Total | |$\checkmark$| |
| Maximum value of the spherically averaged rotation curve Vmax | Total | |$\checkmark$| |
| Radius at which Vmax is achieved. | Total | |$\checkmark$| |
| Total mass currently decoupled as winds | Total | |$\checkmark$| |
| U − V and g − r colour | Total | × |
| Cluster property | Aperture | Log? |
| Group centre of mass | Total | × |
| Group gas metal mass fractions for each species | Total | |$\checkmark$| |
| Group gas metallicity | Total | |$\checkmark$| |
| Group star metal mass fractions for each species | Total | |$\checkmark$| |
| Group star metallicity | Total | |$\checkmark$| |
| Group aperture masses | R500,crit, R500,mean, R200,crit, R200,mean, R200,tophat | |$\checkmark$| |
| Group aperture radii | R500,crit, R500,mean, R200,crit, R200,mean, R200,tophat | |$\checkmark$| |
| Galaxy property . | Aperture . | Log? . |
|---|---|---|
| Total black hole mass | Total | |$\checkmark$| |
| Total black hole mass accretion rate | Total | |$\checkmark$| |
| Magnetic field strength in disc | Total | |$\checkmark$| |
| Magnetic field strength in halo | Total | |$\checkmark$| |
| Centre of mass | Total | × |
| Gas metal mass fractions for each species | Twice half-mass radius, half-mass radius, max radius, SF gas only | |$\checkmark$| |
| Gas total metallicity | Twice half-mass radius, half-mass radius, max radius, SF gas only | |$\checkmark$| |
| Galaxy half-mass radius (per species) | Total | |$\checkmark$| |
| Galaxy half-mass radius (total) | Total | |$\checkmark$| |
| Number of particles (per species) | Total | |$\checkmark$| |
| Number of particles (total) | Total | |$\checkmark$| |
| Total mass | Total, half-mass radius (per species, total), twice half-mass radius, max radius | |$\checkmark$| |
| Subhalo position in box | Total | |$\checkmark$| |
| Subhalo instantaneous SFR | Total, twice half-mass radius, max radius | |$\checkmark$| |
| Subhalo spin parameter κ | Total | |$\checkmark$| |
| Star metal mass fractions for each species | Twice half-mass radius, half-mass radius, max radius | |$\checkmark$| |
| Star total metallicity | Twice half-mass radius, half-mass radius, max radius, SF gas only | |$\checkmark$| |
| Magnitude in U, B, V, K, g, r, i, z bands | Total | × |
| Total mass within K-band half-light radius | Total | |$\checkmark$| |
| Half-light radius in K band | Total | |$\checkmark$| |
| 1D velocity dispersion of all member particles | Total | |$\checkmark$| |
| Maximum value of the spherically averaged rotation curve Vmax | Total | |$\checkmark$| |
| Radius at which Vmax is achieved. | Total | |$\checkmark$| |
| Total mass currently decoupled as winds | Total | |$\checkmark$| |
| U − V and g − r colour | Total | × |
| Cluster property | Aperture | Log? |
| Group centre of mass | Total | × |
| Group gas metal mass fractions for each species | Total | |$\checkmark$| |
| Group gas metallicity | Total | |$\checkmark$| |
| Group star metal mass fractions for each species | Total | |$\checkmark$| |
| Group star metallicity | Total | |$\checkmark$| |
| Group aperture masses | R500,crit, R500,mean, R200,crit, R200,mean, R200,tophat | |$\checkmark$| |
| Group aperture radii | R500,crit, R500,mean, R200,crit, R200,mean, R200,tophat | |$\checkmark$| |
Top: The galaxy properties used to train the decision tree. In the second column, the aperture within which this quantity is calculated is noted. Here, total refers to the total bound mass to this subhalo. In this column, half-mass radius refers to the stellar half-mass radius. Bottom: The cluster properties associated with each galaxy. These are the properties of the cluster that the galaxy has backsplashed from or is falling into. The final column for both shows whether or not the value is pre-scaled logarithmically before its use in the decision tree. Note that this does not affect results, as the decision tree simply performs a set of bisections, but it does aid in the inspection of the results.
| Galaxy property . | Aperture . | Log? . |
|---|---|---|
| Total black hole mass | Total | |$\checkmark$| |
| Total black hole mass accretion rate | Total | |$\checkmark$| |
| Magnetic field strength in disc | Total | |$\checkmark$| |
| Magnetic field strength in halo | Total | |$\checkmark$| |
| Centre of mass | Total | × |
| Gas metal mass fractions for each species | Twice half-mass radius, half-mass radius, max radius, SF gas only | |$\checkmark$| |
| Gas total metallicity | Twice half-mass radius, half-mass radius, max radius, SF gas only | |$\checkmark$| |
| Galaxy half-mass radius (per species) | Total | |$\checkmark$| |
| Galaxy half-mass radius (total) | Total | |$\checkmark$| |
| Number of particles (per species) | Total | |$\checkmark$| |
| Number of particles (total) | Total | |$\checkmark$| |
| Total mass | Total, half-mass radius (per species, total), twice half-mass radius, max radius | |$\checkmark$| |
| Subhalo position in box | Total | |$\checkmark$| |
| Subhalo instantaneous SFR | Total, twice half-mass radius, max radius | |$\checkmark$| |
| Subhalo spin parameter κ | Total | |$\checkmark$| |
| Star metal mass fractions for each species | Twice half-mass radius, half-mass radius, max radius | |$\checkmark$| |
| Star total metallicity | Twice half-mass radius, half-mass radius, max radius, SF gas only | |$\checkmark$| |
| Magnitude in U, B, V, K, g, r, i, z bands | Total | × |
| Total mass within K-band half-light radius | Total | |$\checkmark$| |
| Half-light radius in K band | Total | |$\checkmark$| |
| 1D velocity dispersion of all member particles | Total | |$\checkmark$| |
| Maximum value of the spherically averaged rotation curve Vmax | Total | |$\checkmark$| |
| Radius at which Vmax is achieved. | Total | |$\checkmark$| |
| Total mass currently decoupled as winds | Total | |$\checkmark$| |
| U − V and g − r colour | Total | × |
| Cluster property | Aperture | Log? |
| Group centre of mass | Total | × |
| Group gas metal mass fractions for each species | Total | |$\checkmark$| |
| Group gas metallicity | Total | |$\checkmark$| |
| Group star metal mass fractions for each species | Total | |$\checkmark$| |
| Group star metallicity | Total | |$\checkmark$| |
| Group aperture masses | R500,crit, R500,mean, R200,crit, R200,mean, R200,tophat | |$\checkmark$| |
| Group aperture radii | R500,crit, R500,mean, R200,crit, R200,mean, R200,tophat | |$\checkmark$| |
| Galaxy property . | Aperture . | Log? . |
|---|---|---|
| Total black hole mass | Total | |$\checkmark$| |
| Total black hole mass accretion rate | Total | |$\checkmark$| |
| Magnetic field strength in disc | Total | |$\checkmark$| |
| Magnetic field strength in halo | Total | |$\checkmark$| |
| Centre of mass | Total | × |
| Gas metal mass fractions for each species | Twice half-mass radius, half-mass radius, max radius, SF gas only | |$\checkmark$| |
| Gas total metallicity | Twice half-mass radius, half-mass radius, max radius, SF gas only | |$\checkmark$| |
| Galaxy half-mass radius (per species) | Total | |$\checkmark$| |
| Galaxy half-mass radius (total) | Total | |$\checkmark$| |
| Number of particles (per species) | Total | |$\checkmark$| |
| Number of particles (total) | Total | |$\checkmark$| |
| Total mass | Total, half-mass radius (per species, total), twice half-mass radius, max radius | |$\checkmark$| |
| Subhalo position in box | Total | |$\checkmark$| |
| Subhalo instantaneous SFR | Total, twice half-mass radius, max radius | |$\checkmark$| |
| Subhalo spin parameter κ | Total | |$\checkmark$| |
| Star metal mass fractions for each species | Twice half-mass radius, half-mass radius, max radius | |$\checkmark$| |
| Star total metallicity | Twice half-mass radius, half-mass radius, max radius, SF gas only | |$\checkmark$| |
| Magnitude in U, B, V, K, g, r, i, z bands | Total | × |
| Total mass within K-band half-light radius | Total | |$\checkmark$| |
| Half-light radius in K band | Total | |$\checkmark$| |
| 1D velocity dispersion of all member particles | Total | |$\checkmark$| |
| Maximum value of the spherically averaged rotation curve Vmax | Total | |$\checkmark$| |
| Radius at which Vmax is achieved. | Total | |$\checkmark$| |
| Total mass currently decoupled as winds | Total | |$\checkmark$| |
| U − V and g − r colour | Total | × |
| Cluster property | Aperture | Log? |
| Group centre of mass | Total | × |
| Group gas metal mass fractions for each species | Total | |$\checkmark$| |
| Group gas metallicity | Total | |$\checkmark$| |
| Group star metal mass fractions for each species | Total | |$\checkmark$| |
| Group star metallicity | Total | |$\checkmark$| |
| Group aperture masses | R500,crit, R500,mean, R200,crit, R200,mean, R200,tophat | |$\checkmark$| |
| Group aperture radii | R500,crit, R500,mean, R200,crit, R200,mean, R200,tophat | |$\checkmark$| |
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