On the dependence between UV luminosity and Lyman-alpha equivalent width in high redshift galaxies

Details On the dependence between UV luminosity and Lyman-alpha equivalent width in high redshift galaxies On the dependence between UV luminosity and Lyman-alpha equivalent width in high redshift galaxies

2009-07-21

arxiv.org/abs/0907.3733v1

Mon.Not.Roy.Astron.Soc. 400:232-237,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

7 pages, 3 figures, 2 tables, accepted in MNRAS

Scientific paper

10.1111/j.1365-2966.2009.15439.x

We show that with the simple assumption of no correlation between the Ly-alpha equivalent width and the UV luminosity of a galaxy, the observed distribution of high redshift galaxies in an equivalent width - absolute UV magnitude plane can be reproduced. We further show that there is no dependence between Ly-alpha equivalent width and Ly-alpha luminosity in a sample of Ly-alpha emitters. The test was expanded to Lyman-break galaxies and again no dependence was found. Simultaneously, we show that a recently proposed lack of large equivalent width, UV bright galaxies (Ando et al. 2006) can be explained by a simple observational effect, based on too small survey volumes.

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