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Now showing items 11-18 of 18
Density profile of dark matter haloes and galaxies in the Horizon-AGN simulation : the impact of AGN feedback
(2017-12-01)
Using a suite of three large cosmological hydrodynamical simulations, Horizon-AGN, Horizon-noAGN (no AGN feedback) and Horizon-DM (no baryons), we investigate how a typical sub-grid model for AGN feedback affects the ...
Cosmic evolution of stellar quenching by AGN feedback : clues from the Horizon-AGN simulation
(2017-11-21)
The observed massive end of the galaxy stellar mass function is steeper than its predicted dark matter halo counterpart in the standard $\Lambda $CDM paradigm. In this paper, we investigate the impact of active galactic ...
Major mergers are not significant drivers of star formation or morphological transformation around the epoch of peak cosmic star formation
(2017-03-01)
We investigate the contribution of major mergers (mass ratios > 1 : 5) to stellar mass growth and morphological transformations around the epoch of peak cosmic star formation (z ∼ 2). We visually classify a complete sample ...
H-ATLAS/GAMA : The nature and characteristics of optically red galaxies detected at submillimetre wavelengths
(2016-02-21)
We combine Herschel/SPIRE sub-millimeter (submm) observations with existing multi-wavelength data to investigate the characteristics of low redshift, optically red galaxies detected in submm bands. We select a sample of ...
Radio Galaxy Zoo : host galaxies and radio morphologies derived from visual inspection
(2015-11-01)
We present results from the first twelve months of operation of Radio Galaxy Zoo, which upon completion will enable visual inspection of over 170,000 radio sources to determine the host galaxy of the radio emission and the ...
Galaxy merger histories and the role of merging in driving star formation at z>1
(2015-09-21)
We use Horizon-AGN, a hydrodynamical cosmological simulation, to explore the role of mergers in the evolution of massive (M > 10^10 MSun) galaxies around the epoch of peak cosmic star formation (1zR(4:1 3 are 'blue' (i.e. ...
Galaxy Zoo: evidence for Diverse Star Formation Histories through the Green Valley
(2015-04-17)
Does galaxy evolution proceed through the green valley via multiple pathways or as a single population? Motivated by recent results highlighting radically different evolutionary pathways between early- and late-type galaxies, ...
The role of major mergers in the size growth of intermediate-mass spheroids
(2014-09-11)
We study of the role of ‘major’ mergers (mass ratios >1: 4) in driving size growth in high-redshift (1 < z < 2) spheroidal galaxies (SGs) with stellar masses between 109.5 and 1010.7 M⊙. This is a largely unexplored mass ...