Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 477, Issue 3, Pages 3760-3774Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sty856
Keywords
techniques: photometric; galaxies: evolution; galaxies: high-redshift; galaxies: star formation
Categories
Funding
- STFC studentships
- Oxford Centre for Astrophysical Surveys through Hintze Family Charitable Foundation
- STFC [ST/N000919/1]
- John Fell Oxford University Press (OUP) Research Fund
- ESO programme [179.A-2006]
- STFC [ST/N000919/1, 1659474] Funding Source: UKRI
Ask authors/readers for more resources
By studying the large-scale structure of the bright high-redshift Lyman-break galaxy (LBG) population it is possible to gain an insight into the role of environment in galaxy formation physics in the early Universe. We measure the clustering of a sample of bright (-22.7< M-UV <-21.125) LBGs at z similar to 6 and use a halo occupation distribution (HOD) model to measure their typical halo masses. We find that the clustering amplitude and corresponding HOD fits suggests that these sources are highly biased (b similar to 8) objects in the densest regions of the high-redshift Universe. Coupled with the observed rapid evolution of the number density of these objects, our results suggest that the shape of high-luminosity end of the luminosity function is related to feedback processes or dust obscuration in the early Universe -as opposed to a scenario where these sources are predominantly rare instances of themuch more numerous M-UV similar to -19 population of galaxies caught in a particularly vigorous period of star formation. There is a slight tension between the number densities and clustering measurements, which we interpret this as a signal that a refinement of the model halo bias relation at high redshifts or the incorporation of quasi-linear effects may be needed for future attempts at modelling the clustering and number counts. Finally, the difference in number density between the fields (UltraVISTA has a surface density similar to 1.8 times greater than UDS) is shown to be consistent with the cosmic variance implied by the clustering measurements.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available