UniverseMachine
Plot type: Histogram bins the data by a single field and displays count of objects per bin. Heatmap bins the data by two fields and displays count as color. Conditional distribution bins the data by one field and displays the distribution of a second field within that bin as a boxplot (range and quartiles). Shows a scatterplot of a (random subset) of actual data points.
For log functionality, set the filter to enable only positive values.
For log functionality, set the filter to enable only positive values.
Count: Choose whether the object count per bin is shown in linear or log scale. Count is shown on the Y axis. Count is shown on the color (Z) axis.
Active Filters
reset all
μ : {{filter.aggs.avg?filter.render(filter.aggs.avg):'no data'}}

Range:

{{filter.render(filter.aggs.min)}}

{{filter.render(filter.aggs.max)}}

Select field to filter
Random Sample
Python Query

Example python code to apply the above filters and retrieve data. To use, download and install this module .









Fields Dictionary


Field
Variable
Type
Units
Description





field
field
byte

CANDELS field (COSMOS, EGS, GOODS-N, GOODS-S, UDS)




realization
realization
byte

Realization between 0-7




coord RA
RA
float
deg
Right Ascension




coord Dec
Dec
float
deg
Declination




z
Z(los)
float

Redshift including redshift-space distortions.




z_nopec
Z(cosmo)
float

Cosmological redshift---i.e., without redshift-space distortions.




Scale
Scale
float

Scale factor of the timestep from which the halo was taken




gal_id
ID
long

Halo ID (unique across all timesteps)




DescID
DescID
long

ID of descendant halo (or -1 at z = 0)




UPID
UPID
long

-1 for central halos, otherwise, ID of largest parent halo




Position

float
Mpc





X
X
float

Position of halo relative to axes of lightcone (distance along lightcone) in comoving Mpc/h




Y
Y
float

Position of halo relative to axes of lightcone (distance perpendicular to lightcone X-axis) in comoving Mpc/h




Z
Z
float

Position of halo relative to axes of lightcone (distance perpendicular to lightcone X-axis) in comoving Mpc/h




Velocity

float
km/s





vel x
VX
float

Peculiar velocity in physical (i.e., non-comoving) km/s, relative to lightcone axes




vel y
VY
float

Peculiar velocity in physical (i.e., non-comoving) km/s, relative to lightcone axes




vel z
VZ
float

Peculiar velocity in physical (i.e., non-comoving) km/s, relative to lightcone axes




M
M
float
\(10^{10}M_\odot\)
Halo mass (Bryan & Norman (BN98) 1998 virial mass)




V
V
float
km/s
Halo \(v_{max}\) (physical)




MP
MP
float
\(10^{10}M_\odot\)
Halo peak historical mass (BN98 virial mass)




VMP
VMP
float
km/s
Halo vmax at the time when peak mass was reached




R
R
float
Mpc
Halo raidus (BN98 vir, co-moving kpc/h)




Rank1
Rank1
float
\(\Delta v_{max}\)
Halo rank (see UniverseMachine paper)




M_stellar
SM
float
\(10^{10}M_\odot\)
True stellar mass




ICL
ICL
float
\(10^{10}M_\odot\)
True intracluster stellar mass




SFR
SFR
float
\(M_\odot/yr\)
True star formation rate




obs_SM
obs_SM
float
\(10^{10}M_\odot\)
Observed stellar mass, including random & systematic errors




obs_SFR
obs_SFR
float
\(M_\odot/yr\)
Observed star formation rate (SFR), including random & systemic errors




SSFR
SSFR
float

Observed SSFR




SM/HM
SM/HM
float

SM/HM ratio




UV1500_rest
obs_UV
float
\(M_{1500} AB\)
Observed UV Magnitude




A_UV
A_UV
float
AB Mag
UV attenuation from dust












About Catalog


These lightcones have been populated using the UniverseMachine empirical model. For more details please see Behroozi et al. (2019) and Somerville et al.  (2020).

 Data Release: v1 2019-07-26.

 Data also available at peterbehroozi.com.



More under:






















Active Filters




{{filter.field.name}}







Format


Download







Raw Data





field
CANDELS field (COSMOS, EGS, GOODS-N, GOODS-S, UDS)



realization
Realization between 0-7



coord RA


deg
Right Ascension



coord Dec


deg
Declination



z
Redshift including redshift-space distortions.



z_nopec
Cosmological redshift---i.e., without redshift-space distortions.



Scale
Scale factor of the timestep from which the halo was taken



gal_id
Halo ID (unique across all timesteps)



DescID
ID of descendant halo (or -1 at z = 0)



UPID
-1 for central halos, otherwise, ID of largest parent halo



Position
Mpc



Velocity
km/s



M


\(10^{10}M_\odot\)
Halo mass (Bryan & Norman (BN98) 1998 virial mass)



V


km/s
Halo \(v_{max}\) (physical)



MP


\(10^{10}M_\odot\)
Halo peak historical mass (BN98 virial mass)



VMP


km/s
Halo vmax at the time when peak mass was reached



R


Mpc
Halo raidus (BN98 vir, co-moving kpc/h)



Rank1


\(\Delta v_{max}\)
Halo rank (see UniverseMachine paper)



M_stellar


\(10^{10}M_\odot\)
True stellar mass



ICL


\(10^{10}M_\odot\)
True intracluster stellar mass



SFR


\(M_\odot/yr\)
True star formation rate



obs_SM


\(10^{10}M_\odot\)
Observed stellar mass, including random & systematic errors



obs_SFR


\(M_\odot/yr\)
Observed star formation rate (SFR), including random & systemic errors



SSFR
Observed SSFR



SM/HM
SM/HM ratio



UV1500_rest


\(M_{1500} AB\)
Observed UV Magnitude



A_UV


AB Mag
UV attenuation from dust




X
Position of halo relative to axes of lightcone (distance along lightcone) in comoving Mpc/h



Y
Position of halo relative to axes of lightcone (distance perpendicular to lightcone X-axis) in comoving Mpc/h



Z
Position of halo relative to axes of lightcone (distance perpendicular to lightcone X-axis) in comoving Mpc/h



vel x
Peculiar velocity in physical (i.e., non-comoving) km/s, relative to lightcone axes



vel y
Peculiar velocity in physical (i.e., non-comoving) km/s, relative to lightcone axes



vel z
Peculiar velocity in physical (i.e., non-comoving) km/s, relative to lightcone axes