The table Guo2010a stores the results of running the L-Galaxies code version described in
Guo etal (2010) on the halo merger trees in
the milli-Millennium simulation.
This table is a copy of the table mMR in the database Guo2010a, available for registered users only.
| column | type | UCD | unit | description |
|---|
| galaxyID | bigint | meta.id;meta.main | |
The unique identifier of this galaxy. Built from the topologically sorted merger tree as described in |
| haloID | bigint | meta.id.parent | |
The haloId of the subhalo (in the appropriate halo table) containing this galaxy. |
| firstProgenitorId | bigint | meta.id.assoc | |
Id of the main progenitor of this galaxy. Strictly galaxyId+1 iff lastProgenitorId > galaxyId, else -1 |
| nextProgenitorId | bigint | meta.id.assoc | |
galaxyId of next progenitor of this galaxy in the linked list structure used to facilitate traversing trees in code. |
| lastProgenitorId | bigint | meta.id.assoc | | The galaxyId of the last progenitor of this galaxy in the topological ordering used to assign galaxyId-s as described in TBD |
| fofCentralId | bigint | meta.id.assoc | | The galaxy id of the central galaxy of the FOF group this galaxy is in. |
| treeId | bigint | meta.id.parent | | Unique id of galaxy formation tree containing this galaxy. Note that this treeId does not identify merger trees but thelarger structures defining galaxy formation units.
The following equality holds:
treeId = 1000000*floor(galaxyId/1000000). |
| descendantId | bigint | meta.id.assoc | | galaxyId of the descendant of this galaxy in its merger tree. |
| mainLeafID | bigint | meta.id.assoc | | galaxyId of the leaf on the main branch this galaxy is part of. Obtained by following firstProgenitorId as far as it goes. |
| treeRootID | bigint | meta.id.assoc | | The galaxyId of the galaxy at the root of the merger tree this galaxy is in. Especially useful for speeding up queries for descendants for a given progenitor. See TBD for an example. |
| subHaloID | bigint | meta.id | | Id of the subhalo containing this galaxy,
as given by the column subhaloId in the millimil..FOFSubHalo table.
Alternative to haloId.
|
| fofID | bigint | meta.id.assoc | | The subhaloId (see previous column) of the subhalo at the center of the FOF group containing this galaxy.
|
| phkey | int | | | The Peano-Hilbert index of the cell this galaxy is in, in the 323 grid stored in millimil..MMField. |
| redshift | real | time | | The redshift corresponding to the snapnum (in millimil..Snapshots) for this galaxy. |
| type | int | src.class | | Type indicating whether galaxy is at center of FOF group (type=0), at center of subhalo that is not at center of its FOF gorup (type=1), or is a setellite that has lost its subhalo (type=2). |
| snapnum | int | time | | Snapshot index, from 0-63. |
| centralMvir | real | phys.veloc.dispersion | 1010 Msun/h | [description] |
| x | real | pos.cartesian.x | Mpc/h | X-component of position of galaxy. |
| y | real | pos.cartesian.y | Mpc/h | Y-component of position of galaxy. |
| z | real | pos.cartesian.z | Mpc/h | Z-component of position of galaxy. |
| velX | real | phys.veloc | km/s | The X-component of the physical peculiar velocity of the galaxy. |
| velY | real | phys.veloc | km/s | The Y-component of the physical peculiar velocity of the galaxy. |
| velZ | real | phys.veloc | km/s | The Z-component of the physical peculiar velocity of the galaxy. |
| np | int | meta.number | | Number of particles of the subhalo this galaxy is in. |
| mvir | real | phys.mass | 1010 Msun/h | Virial mass of the FOF group this galaxy was in when last it was a type 0 galaxy.
I.e. current mass for type 0 galaxies, "infall mass" for type 1,2 galaxies. |
| rvir | real | phys.size.radius | Mpc/h | Virial radius of the FOF group this galaxy was in when last it was a type 0 galaxy.
I.e. current Rvir for type 0 galaxies, "infall rvir" for type 1,2 galaxies |
| vvir | real | phys.veloc | km/s | Virial velocity of the subhalo the galaxy is/was the center of.
|
| vmax | real | phys.veloc.rotat | km/s | Maximum rotational velocity of the subhalo of which this galaxy is the center, or the last value for satellite galaxies.
|
| gasSpinX | real | phys.veloc.ang | Mpc/h km/s | The X-component of the spin of the cold gas disk |
| gasSpinY | real | phys.veloc.ang | Mpc/h km/s | The X-component of the spin of the cold gas disk |
| gasSpinZ | real | phys.veloc.ang | Mpc/h km/s | The X-component of the spin of the cold gas disk |
| stellarSpinX | real | phys.veloc.ang | Mpc/h km/s | The X-component of the spin of the stellar disk |
| stellarSpinY | real | phys.veloc.ang | Mpc/h km/s | The X-component of the spin of the stellar disk |
| stellarSpinZ | real | phys.veloc.ang | Mpc/h km/s | The X-component of the spin of the stellar disk |
| infallVmax | real | phys.veloc.rotat | km/s | Maximum rotational velocity of the host halo of this galaxy at infallSnap. |
| infallSnap | int | time | | Most recent (largest) snapnum at which this galaxy's type changed from 0 to 1 or 2 |
| hotRadius | real | phys.size.radius | Mpc/h | Radius out to which hot gas extends: rvir for type 0; 0 for type 2; maximum radius out to which hot gas is not stripped for type 1. |
| oriMergeTime | real | [UCD] | 1339.77 Gyr | Estimated dyniamical friction time when the merger clock is set (in internal units of the code). |
| mergeTime | real | [UCD] | 1339.77 Gyr | Estimated remaining merging time. oriMergeTime - time since the merger clock is set. |
| coldGas | real | phys.mass | 1010 Msun /h | Mass in cold gas disk. |
| stellarMass | real | phys.mass | 1010 Msun /h | Total mass in stars in disk and bulge together. |
| bulgeMass | real | phys.mass | 1010 Msun /h | Mass of stars in bulge. |
| hotGas | real | phys.mass | 1010 Msun /h | Mass in hot gas. |
| ejectedMass | real | phys.mass | 1010 Msun /h | The ejected mass component (see de Lucia et al., 2004, MNRAS, Volume 349, 1101-1116).
|
| blackHoleMass | real | phys.mass | 1010 Msun /h | Mass of central black hole. |
| icmStellarMass | real | phys.mass | 1010 Msun /h | Mass in intra-cluster stars |
| metalsColdGas | real | phys.mass | 1010 Msun /h | Mass in metals in cold gas. |
| metalsStellarMass | real | phys.mass | 1010 Msun /h | Mass in metals in stars. |
| metalsBulgeMass | real | phys.mass | 1010 Msun /h | Mass in metals in stars in bulge. |
| metalsHotGas | real | phys.mass | 1010 Msun /h | Mass in metals in hot gas. |
| metalsEjectedMass | real | phys.mass | 1010 Msun /h | Mass in metals in the ejected mass component. |
| metalsICMStellarMass | real | phys.mass | 1010 Msun /h | Mass in metals in intra-cluster stars |
| sfr | real | phys.SFR | Msun/yr | Star formation rate |
| sfrBulge | real | phys.SFR | Msun/yr | Star formation rate in bulge. |
| xrayLum | real | em.X-Ray | log10(erg/sec) | Log10 of X-Ray luminosity in erg/sec |
| bulgeSize | real | phys.size.radius | Mpc/h | Half mass radius of bulge |
| stellarDiskRadius | real | phys.size.radius | Mpc/h | Size of the stellar disk, 3x the scale length. |
| gasDiskRadius | real | phys.size.radius | Mpc/h | Size of the gas disk, 3x the scale length. |
| disruptionOn | int | | | 0: galaxy merged onto merger center;
1: galaxy was disrupted before merging onto its descendant, matter went into ICM of merger center |
| mergeOn | int | | | 0: merger clock not set yet;
1: type 1 galaxy with baryon mass > halo mass, separate dynamical friction time calculated
2: this galaxy is type 2 and will merge into the merger center in the next snapshot
3: this galaxy is type 1 and will merge into the central galaxy of the main halo in the next snapshot |
| coolingRadius | real | phys.size.radius | Mpc/h | The radius within which the cooling time scale is shorter than the dynamical timescale
|
| u_mag | real | phot.mag;em.opt.U | | Rest frame total absolute magnitudes, SDSS u band. |
| g_mag | real | phot.mag;em.opt.B | | Rest frame total absolute magnitude, SDSS g band. |
| r_mag | real | phot.mag;em.opt.R | | Rest frame total absolute magnitude, SDSS r band. |
| i_mag | real | phot.mag;em.opt.I | | Rest frame total absolute magnitude, SDSS i band. |
| z_mag | real | phot.mag;em.opt | | Rest frame total absolute magnitude, SDSS z band. |
| uBulge | real | phot.mag;em.opt.U | | Rest frame absolute magnitude of bulge, SDSS u band. |
| gBulge | real | phot.mag;em.opt.B | | Rest frame absolute magnitude of bulge, SDSS g band. |
| rBulge | real | phot.mag;em.opt.R | | Rest frame absolute magnitude of bulge, SDSS r band. |
| iBulge | real | phot.mag;em.opt.I | | Rest frame absolute magnitude of bulge, SDSS i band. |
| zBulge | real | phot.mag;em.opt | | Rest frame absolute magnitude of bulge, SDSS z band. |
| uDust | real | phot.mag;em.opt.U | | Rest frame total absolute magnitude, SDSS u band, dust extinction included.
|
| gDust | real | phot.mag;em.opt.B | | Rest frame total absolute magnitude, SDSS g band, dust extinction included. |
| rDust | real | phot.mag;em.opt.R | | Rest frame total absolute magnitude, SDSS r band, dust extinction included. |
| iDust | real | phot.mag;em.opt.I | | Rest frame total absolute magnitude, SDSS i band, dust extinction included. |
| zDust | real | phot.mag;em.opt | | Rest frame total absolute magnitude, SDSS z band, dust extinction included. |
| massweightedAge | real | time.age | 109yr | The age of this galaxy, weighted by mass of its components. |
| uICL | real | phot.mag;em.opt.U | | Rest frame absolute magnitude of ICL, SDSS u band. |
| gICL | real | phot.mag;em.opt.B | | Rest frame absolute magnitude of ICL, SDSS i band |
| rICL | real | phot.mag;em.opt.R | | Rest frame absolute magnitude of ICL, SDSS i band |
| iICL | real | phot.mag;em.opt.I | | Rest frame absolute magnitude of ICL, SDSS i band |
| zICL | real | phot.mag;em.opt | | Rest frame absolute magnitude of ICL, SDSS i band |
