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Spherical models

Description of mocks

These DFs are calculated for different potentials (`Cusp' or `Core'), different light profiles (`Plum' or 'Nonplum'; but note that even the `Plum' case is not quite Plummer as it has an inner slope with power-law index 0.1 instead of 0), and different velocity anisotropy profiles (`Iso', 'OM', `Tan' for isotropic, Osipkov-Merritt and constant tangential).

  • See Matthew Walker's README for explanations of the columns of the first eight and last two mock datasets.
  • For the single component models, versions with velocity errors are included in separate *_err.dat files. The velocity errors are applied to vx,vy,vz and assumed to be Gaussian of width 2km/s. Please use the files WITH velocity errors as default.
  • The single component models are also available with different sampling. In priority order, please run:
    • Full sampling (10000 stars);
    • 1000 stars, model _0
    • 100 stars, model _0
    • And, if feasible 1000 star models _1 → _4 and 100 star models _1 → _9
  • The tangential models are described in another README. (Note: the alpha values provided in this file are 1/alpha as defined in the readme above for the other spherical models.)
  • For the split component models, velocity errors, contamination and metallicity distribution functions for each component have are all included in the data files. See the above .pdf for further details. Included are the original mocks from Matt Walker and two more for each of the cored and cusped cases :: one where the mean Mg of the two populations is separated by 0.35dex (_mgsepsamll.dat); and one where it is by 0.6dex (_mgseplarge.dat). Please run these using all available stars.
  • In all cases units are kpc, km/s.

Choice of projection

In order to enable straightforward comparisons, please test first using the projection along the Z-axis. Projections along X- and Y- axes can subsequently be used for 'independent' realisations.

Mock data

Model Description R_1/2 Data file
PlumCuspIso Isotropic ~Plummer in cusped halo PlumCuspIso.tar
PlumCoreIso Isotropic ~Plummer in cored halo PlumCoreIso.tar
NonplumCuspIso Isotropic NonPlummer in cusped halo NonplumCuspIso.tar
NonplumCoreIso Isotropic NonPlummer in cored halo NonplumCoreIso.tar
PlumCuspOm Osipkov_Merritt ~Plummer in cusped halo PlumCuspOm.tar
PlumCoreOm Osipkov-Merritt ~Plummer in cored halo PlumCoreOm.tar
NonplumCuspOm Osipkov-Merritt NonPlummer in cusped halo NonplumCuspOm.tar
NonplumCoreOm Osipkov-Merritt NonPlummer in cored halo NonplumCoreOm.tar
PlumCuspTan Constant tangential anisotropy, ~Plummer in cusped halo PlumCuspTan.tar
PlumCoreTan Constant tangential anisotropy, ~Plummer in cored halo PlumCoreTan.tar
NonplumCuspTan Constant tangential anisotropy, NonPlummer in cusped halo NonplumCuspTan.tar
NonplumCoreTan Constant tangential anisotropy, NonPlummer in cored halo NonplumCoreTan.tar
SplitCompCusp Two populations in cusped halo, The mean Mg in the two populations are separated with 0.35 index in _mgsepsmall.dat and 0.6 index in _mgseplarge.tar SplitCompCusp.dat SplitCompCusp_mgsepsmall.dat SplitCompCusp_mgseplarge.dat
SplitCompCore Two populations in cored halo SplitCompCore.dat
tests/sphtri/spherical.txt · Last modified: 2022/10/24 12:26 by