Conveners
Galaxy: halo occupation
- Hong Guo (Shanghai Astronomical Observatory)
We set out to construct a set of ideal mock galaxy redshift surveys (MGRSs) for the future Chinese Space-station Survey Telescope (CSST) observation, where subsequent survey selection effects can be added and evaluated.
The Conditional Colour-Magnitude Distribution (CCMD) is a comprehensive model of the colour-magnitude-halo mass distribution of present day galaxies. It reproduces well the observed galaxy abundance and clustering of galaxies defined by arbitrary luminosity and colour cuts. We present a comprehensive comparison of the galaxy colour--magnitude--halo mass relation from the CCMD galaxy mocks and...
Machine learning techniques are widely implemented to predict galaxy properties based on halo or subhalo properties in semi-analytic models (SAM) and hydrodynamic simulations. The multivariate relation between galaxies and their (sub)halos can be efficiently captured and reproduced. I will present our results on predicting galaxy properties based on different galaxy formation models....
Galaxy groups and clusters represent systems of galaxies residing within the same dark matter halos. This inherent connection to dark matter halos positions galaxy groups as a direct avenue for addressing pivotal questions in astrophysics, such as the role of the environment in galaxy formation and evolution, as well as the cosmic density field. Various group-finding methodologies have been...
