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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.

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Authors

M. Le Delliou

B. Guiderdoni

R. Bacon

H. Courtois

T. Sousbie



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.

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Copyright 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.







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