BDMW (mdr1.bdmw)
The table has 467761504 rows, 30 columns.
Description
BDM (Bound Density Maximum) catalogue for all available snapshots, calculated using the standard overdensity criterion with 200 * ρback (background density).
bdmid = ( snapnum*108 +(number in BDM catalogue) )
Attribution
In order to properly acknowledge our efforts, we request the following paragraph to be included in the "Acknowledgements" section of any publication which makes use of the simulation data above via the CosmoSim or MultiDark database:
Acknowledgements – Database
The CosmoSim database used in this paper is a service by the Leibniz-Institute for Astrophysics Potsdam (AIP). The MultiDark database was developed in cooperation with the Spanish MultiDark Consolider Project CSD2009-00064.
Acknowledgements – Simulations
The authors gratefully acknowledge the Gauss Centre for Supercomputing e.V. (www.gauss-centre.eu) and the Partnership for Advanced Supercomputing in Europe (PRACE, www.prace-ri.eu) for funding the MultiDark simulation project by providing computing time on the GCS Supercomputer SuperMUC at Leibniz Supercomputing Centre (LRZ, www.lrz.de). The Bolshoi simulations have been performed within the Bolshoi project of the University of California High-Performance AstroComputing Center (UC-HiPACC) and were run at the NASA Ames Research Center.
More information can be found on the credit page.
Columns
| Name | Type | UCD | Unit | Description |
|---|---|---|---|---|
| bdmid | long |
meta.id meta.main |
unique id for bdm-halo |
|
| snapnum | short | time.epoch |
number of snapshot |
|
| nincat | long | meta.id |
number of halo in BDM catalogue file (= "Nhalo") |
|
| hostflag | long | meta.id |
index (flag) indicating if substructure or host; -1 for distinct halo, bdmId of parent halo for subhalos |
|
| x | double | pos.cartesian.x | h-1.Mpc |
(comoving) position, x-component |
| y | double | pos.cartesian.y | h-1.Mpc |
(comoving) position, y-component |
| z | double | pos.cartesian.z | h-1.Mpc |
(comoving) position, z-component |
| vx | double |
phys.veloc pos.cartesian.x |
km.s-1 |
(peculiar) velocity, x-component |
| vy | double |
phys.veloc pos.cartesian.y |
km.s-1 |
(peculiar) velocity, y-component |
| vz | double |
phys.veloc pos.cartesian.z |
km.s-1 |
(peculiar) velocity, z-component |
| np | int | meta.number |
number of particles in halo |
|
| mvir | double | phys.mass | h-1.solMass |
halo mass - mass of bound particles within Rvir |
| mtot | double | phys.mass | h-1.solMass |
halo mass - mass of all particles within Rvir |
| rvir | double | phys.size.radius | h-1.Mpc |
virial radius |
| vrms | double | phys.veloc.dispersion | km.s-1 |
root mean square proper velocities of bound dark matter particles |
| vcir | double | phys.veloc | km.s-1 |
maximum circular velocity in the halo |
| conc | double |
phys.size arith.ratio |
concentration of the halo as found from |
|
| xoff | double |
phys.size arith.ratio |
offset parameter |
|
| virialratio | double |
phys.energy arith.ratio |
virial ratio = 2 K/Epot - 1 |
|
| spin | double |
spin parameter |
||
| rrms | double | phys.size.radius | h-1.Mpc |
root mean square distance of halo particles |
| axisratio_2_1 | double |
ratio of intermediate to major axis (as estimated in a spherical region via the modified inertia tensor) |
||
| axisratio_3_1 | double |
ratio of minor to major axis |
||
| axis1_x | double |
x-component of major axis |
||
| axis1_y | double |
y-component of major axis |
||
| axis1_z | double |
z-component of major axis |
||
| ix | int | pos.cartesian.x |
spatial index, x-direction |
|
| iy | int | pos.cartesian.y |
spatial index, y-direction |
|
| iz | int | pos.cartesian.z |
spatial index, z-direction |
|
| phkey | int |
Peano-Hilbert-key, i.e. index along the Peano-Hilbert curve |