unimach.yml

title: UniverseMachine
synopsis: Empirical model developed by P. Behroozi and collaborators
descr: >
  These lightcones have been populated using the UniverseMachine empirical model. For more details please see <a class="underline" target="_blank" href='http://adsabs.harvard.edu/abs/2018arXiv180607893B'>Behroozi et al.</a> (2019) and <a class="underline" href="https://arxiv.org/abs/2102.00108">Somerville et al. </a> (2020).<br></br>
  Data Release: v1 2019-07-26.<br></br>
  Data also available at <a class="underline" target="_blank" href="https://www.peterbehroozi.com/data.html">peterbehroozi.com</a>.
index: unimach
count: 250614266
order: 'candels-2'
pipeline: |
  ctx['X'] = 1.47059*ctx['X'];
  ctx['Y'] = 1.47059*ctx['Y'];
  ctx['Z'] = 1.47059*ctx['Z'];
  ctx['M'] = 1.0e-10*ctx['M'];
  ctx['MP'] = 1.0e-10*ctx['MP'];
  ctx['R'] = 0.00147059*ctx['R']*ctx['Scale'];
  ctx['SM'] = 1.0e-10*ctx['SM'];
  ctx['ICL'] = 1.0e-10*ctx['ICL'];
  ctx['obs_SM'] = 1.0e-10*ctx['obs_SM'];
key: ID # i think? maybe need field?
fields:
  - name: field
    dict: candels_field
    flag: top
  - name: realization
    dict: candels_realization
    flag: top

  - name: RA
    dict: ppos_x
    type: float
    units: 'deg'
  - name: Dec
    dict: ppos_y
    type: float
    units: 'deg'
  - name: Z(los)
    dict: redshift
    type: float
    descr: Redshift including redshift-space distortions.
  - name: Z(cosmo)
    dict: true_redshift
    type: float
    descr: Cosmological redshift---i.e., without redshift-space distortions.
  - name: Scale
    type: float
    descr: Scale factor of the timestep from which the halo was taken
  - name: ID
    dict: candels_gal_id # also halo_id
    type: long
    descr: Halo ID (unique across all timesteps)
  - name: DescID
    type: long
    descr: ID of descendant halo (or -1 at z = 0)
  - name: UPID
    type: long
    descr: -1 for central halos, otherwise, ID of largest parent halo
  - name: ""
    title: Position
    units: 'Mpc'
    sub:
    - name: 'X'
      title: 'X'
      dict: pos_x
      type: float
      descr: 'Position of halo relative to axes of lightcone (distance along lightcone) in comoving Mpc/h'
    - name: 'Y'
      title: 'Y'
      dict: pos_y
      type: float
      descr: 'Position of halo relative to axes of lightcone (distance perpendicular to lightcone X-axis) in comoving Mpc/h'
    - name: 'Z'
      title: 'Z'
      dict: pos_z
      type: float
      descr: 'Position of halo relative to axes of lightcone (distance perpendicular to lightcone X-axis) in comoving Mpc/h'
  - name: ""
    title: Velocity
    units: 'km/s'
    dict: vel
    sub:
    - name: VX
      # title: '\(V_x\)'
      type: float
      descr: 'Peculiar velocity in physical (i.e., non-comoving) km/s, relative to lightcone axes'
      dict: vel_x
    - name: VY
      # title: '\(V_y\)'
      type: float
      descr: 'Peculiar velocity in physical (i.e., non-comoving) km/s, relative to lightcone axes'
      dict: vel_y
    - name: VZ
      # title: '\(V_z\)'
      type: float
      descr: 'Peculiar velocity in physical (i.e., non-comoving) km/s, relative to lightcone axes'
      dict: vel_z
  - name: M
    dict: M
    type: float
    descr: Halo mass (Bryan & Norman (BN98) 1998 virial mass)
    units: '\(10^{10}M_\odot\)'
  - name: V
    type: float
    descr: 'Halo \(v_{max}\) (physical)'
    units: 'km/s'
  - name: MP
    type: float
    descr: Halo peak historical mass (BN98 virial mass)
    units: '\(10^{10}M_\odot\)'
  - name: VMP
    type: float
    descr: Halo vmax at the time when peak mass was reached
    units: 'km/s'
  - name: R
    dict: R
    type: float
    descr: 'Halo raidus (BN98 vir, co-moving kpc/h)'
    units: 'Mpc'
  - name: Rank1
    type: float
    descr: 'Halo rank (see UniverseMachine paper)'
    units: '\(\Delta v_{max}\)'
  - name: SM
    dict: M_stellar
    type: float
    descr: True stellar mass
    units: '\(10^{10}M_\odot\)'
  - name: ICL
    type: float
    descr: True intracluster stellar mass
    units: '\(10^{10}M_\odot\)'
  - name: SFR
    dict: SFR
    type: float
    descr: True star formation rate
    units: '\(M_\odot/yr\)'
  - name: obs_SM
    type: float
    descr: Observed stellar mass, including random & systematic errors
    units: '\(10^{10}M_\odot\)'
  - name: obs_SFR
    type: float
    descr: Observed star formation rate (SFR), including random & systemic errors
    units: '\(M_\odot/yr\)'
  - name: SSFR
    type: float
    descr: Observed SSFR
  - name: "SM/HM"
    type: float
    descr: SM/HM ratio
  - name: obs_UV
    dict: UV1500_rest
    type: float
    descr: Observed UV Magnitude
    units: '\(M_{1500} AB\)'
  - name:  A_UV
    type: float
    descr: UV attenuation from dust
    units: 'AB Mag'