Galaxy to dark matter halo connection

[gfavole]

Description

Set up a basic halo-galaxy connection prescription working (at least) for very complete galaxy samples. We can test both sub-halo abundance matching model (SHAM) and halo occupation distribution models (HOD).

Inputs

Halo proxy: maximum circular velocities
Galaxy proxy: luminosity or stellar mass

Outputs

Galaxy mocks catalogue containing both halo and galaxy properties.

References

SHAM: Conroy et al. 2006; Behroozi et al. 2010; Trujillo-Gomez et al. 2011; Nuza et al. 2013; Favole et al. 2016; Rodríguez-Torres et al. 2016
HOD: Berlin & Weinberg 2002; Kravtsov et al. 2004; Zheng et al. 2005, 2007

[rrjbca]

The Vale+Ostriker halo-galaxy matching algorithm is already implemented #70 we just need to write a model to generate the subhalo population #148. That code can also match on circular velocities and stellar masses if somebody writes models to calculate them.

[rrjbca]

I am much less familiar with HOD, if it's an alternative to SHAM we should choose one to start with and get a simple pipeline working for v0.2. Probably SHAM since parts of the algorithm are already in place. Unless we are going to do this all with an external code

[gfavole]

I have external codes ready for both SHAM and HOD if you want. From the last conversation we had with Adam, the idea is to implement a basic SHAM model based on Vale & Ostriker formalism, do the entire analysis end-to-end and maybe include HOD in a later implementation