The abundance of Lyα emitters in hierarchical models

Le Delliou, M.; Lacey, C.G.; Baugh, C.M.; Guiderdoni, B.; Bacon, R.; Courtois, H.; Sousbie, T.; Morris, S.L.

Abstract

We present predictions for the abundance of Lyα emitters in hierarchical structure formation models. We use the GALFORM semi-analytical model of galaxy formation to explore the impact on the predicted counts of varying assumptions about the escape fraction of Lyα photons, the redshift at which the Universe reionized and the cosmological density parameter. A model with a fixed escape fraction gives a remarkably good match to the observed counts over a wide redshift interval. The counts at bright fluxes are dominated by ongoing starbursts. We present predictions for the expected counts in a typical observation with the Multi-Unit Spectroscopic Explorer (MUSE) instrument proposed for the Very Large Telescope.

Citation

Le Delliou, M., Lacey, C., Baugh, C., Guiderdoni, B., Bacon, R., Courtois, H., …Morris, S. (2005). The abundance of Lyα emitters in hierarchical models. Monthly Notices of the Royal Astronomical Society, 357(1), L11-L15. https://doi.org/10.1111/j.1745-3933.2005.00007.x

• Journal Article Type: Article
• Acceptance Date: Nov 5, 2004
• Online Publication Date: Feb 1, 2005
• Publication Date: 2005-02
• Deposit Date: Nov 22, 2006
• Publicly Available Date: Nov 20, 2013
• Journal: Monthly Notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Electronic ISSN: 1365-2966
• Publisher: Royal Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 357
• Issue: 1
• Pages: L11-L15
• DOI: https://doi.org/10.1111/j.1745-3933.2005.00007.x
• Keywords: Galaxies, Formation, High-redshift, Cosmology.
• Public URL: https://durham-repository.worktribe.com/output/1601906