We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.

Durham Research Online
You are in:

The abundance of Lyα emitters in hierarchical models.

Le Delliou, M. and Lacey, Cedric G. and Baugh, C. M. and Guiderdoni, B. and Bacon, R. and Courtois, H. and Sousbie, T. and Morris, S. L. (2005) 'The abundance of Lyα emitters in hierarchical models.', Monthly Notices of the Royal Astronomical Society., 357 (1). L11-L15.


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.

Item Type:Article
Keywords:Galaxies, Formation, High-redshift, Cosmology.
Full text:(VoR) Version of Record
Download PDF
Publisher Web site:
Publisher statement:This article has been published in the Monthly Notices of the Royal Astronomical Society © 2005 The Authors. Published by Oxford University Press on behalf of The Royal Astronomical Society. All rights reserved.
Date accepted:05 November 2004
Date deposited:20 November 2013
Date of first online publication:01 February 2005
Date first made open access:No date available

Save or Share this output

Look up in GoogleScholar