The spatial distribution of cold gas in hierarchical galaxy formation models

  title={The spatial distribution of cold gas in hierarchical galaxy formation models},
  author={Han Seek Kim and Carlton M Baugh and Andrew J. Benson and Shaun Cole and Carlos S. Frenk and Cedric G Lacey and Chris Power and M. Schneider Durham and Caltech and Leicester},
  journal={Monthly Notices of the Royal Astronomical Society},
The distribution of cold gas in dark matter haloes is driven by key processes in galaxy formation: gas cooling, galaxy mergers, star formation and reheating of gas by supernovae. We compare the predictions of four different galaxy formation models for the spatial distribution of cold gas. We find that satellite galaxies make little contribution to the abundance or clustering strength of cold gas selected samples, and are far less important than they are in optically selected samples. The halo… Expand
H i-selected galaxies in hierarchical models of galaxy formation and evolution
In this work, we study the basic statistical properties of HI-selected galaxies extracted from six different semi-analytic models, all run on the same cosmological N-body simulation. One modelExpand
Massive, red galaxies in a hierarchical universe - II. Clustering of Extremely Red Objects
We present predictions for the clustering of Extremely Red Objects (EROs) in acold dark matter universe, using a semi-analytical galaxy formation model in combination with a cosmological N-bodyExpand
Modelling the dusty universe - II. The clustering of submillimetre-selected galaxies
We combine the GALFORM semi-analytical model of galaxy formation, which predicts the star formation and merger histories of galaxies, the GRASIL spectrophotometric code, which calculates the spectralExpand
Cosmic evolution of the atomic and molecular gas contents of galaxies
We study the evolution of the cold gas content of galaxies by splitting the interstellar medium into its atomic and molecular hydrogen components, using the galaxy formation model galform in the ΛExpand
How robust are predictions of galaxy clustering
We use the Millennium Simulation data base to compare how different versions of the Durham and Munich semi-analytical galaxy formation models populate dark matter haloes with galaxies. The modelsExpand
The spatial distribution of neutral hydrogen as traced by low H I mass galaxies
The formation and evolution of galaxies with low neutral atomic hydrogen (HI) masses, MHI<108h−2M⊙, are affected by host dark matter halo mass and photoionisation feedback from the UV backgroundExpand
Grand unification of AGN activity in the ΛCDM cosmology
We track the coevolution of supermassive black holes (SMBHs) and their host galaxies through cosmic time. The calculation is embedded in the GALFORM semi-analytic model which simulates the formationExpand
The clustering and halo occupation distribution of Lyman-break galaxies at z ˜ 4.
We investigate the clustering of Lyman-break galaxies (LBGs) at z ∼ 4. Using the hierarchical galaxy formation model GALFORM, we predict, for the first time using a semi-analytical model withExpand
The Galaxy Formation Model
In this Chapter, the technique of semi-analytic models of galaxy formation is described. I focus in the GALFORM model and summarise the aspects of cosmology that are the most relevant to theExpand
Constraints on black hole fuelling modes from the clustering of X-ray AGN
We present a clustering analysis of X-ray selected active galactic nuclei (AGN) by compiling X-ray samples from the literature and re-estimating the dark-matter (DM) halo masses of AGN in a uniformExpand


The nature of galaxy bias and clustering
We have used a combination of high resolution cosmological N-body simulations and semi-analytic modelling of galaxy formation to investigate the processes that determine the spatial distribution ofExpand
The redshift evolution of the mass function of cold gas in hierarchical galaxy formation models
Accurately predicting how the cosmic abundance of neutral hydrogen evolves with redshift is a challenging problem facing modellers of galaxy formation. We investigate the predictions of fourExpand
Breaking the hierarchy of galaxy formation
Recent observations of the distant Universe suggest that much of the stellar mass of bright galaxies was already in place at z > 1. This presents a challenge for models of galaxy formation becauseExpand
A recipe for galaxy formation
We present a detailed prescription for how galaxy formation can be modelled in hierarchical theories of structure formation. Our model incorporates the formation and merging of dark matter halos, theExpand
The colours of satellite galaxies in groups and clusters
Current models of galaxy formation predict satellite galaxies in groups and clusters that are redder than observed. We investigate the effect on the colours of satellite galaxies produced by theExpand
Halo occupation numbers and galaxy bias
We propose a heuristic model that displays the main features of realistic theories for galaxy bias. We first show that the low-order clustering statistics of the dark-matter distribution dependExpand
What Shapes the Luminosity Function of Galaxies
We investigate the physical mechanisms that shape the luminosity function of galaxies in hierarchical clustering models. Beginning with the mass function of dark matter halos in the ΛCDM (Λ cold darkExpand
Ram pressure stripping the hot gaseous haloes of galaxies in groups and clusters
We use a large suite of carefully controlled full hydrodynamic simulations to study the ram pressure stripping of the hot gaseous haloes of galaxies as they fall into massive groups and clusters. TheExpand
The hierarchical formation of the brightest cluster galaxies
We use semi-analytic techniques to study the formation and evolution of brightest cluster galaxies (BCGs). We show the extreme hierarchical nature of these objects and discuss the limitations ofExpand
The Weak Clustering of Gas-rich Galaxies
We examine the clustering properties of H I-selected galaxies through an analysis of the H I Parkes All-Sky Survey Catalogue (HICAT) two-point correlation function. Various subsamples are extractedExpand