Abstract
In this proceedings we report the findings of a search for bright Lyman-break galaxies (LBGs) at z > 5 using the UKIDSS Ultra Deep Survey (UDS) and Subaru/XMM-Newton Deep Survey (SXDS). Within the 0.6 square degree region covered by the SXDS and UDS early data release (EDR) we identify nine 5 < z < 6 LBG candidates brighter than z'(AB) = 25, corresponding to a surface density of 0.005 +/- 0.002 per square arcmin. Modelling of the optical+near-infrared photometry suggests that the typical stellar mass of the LBG candidates is greater than or similar to 5 x 10(10) M-circle dot, placing them amongst the most massive galaxies currently known at z >= 5. It is found that ACDM structure formation can produce sufficient numbers of dark matter halos at z >= 5 to accommodate our estimated number density of massive LBGs for plausible values Of sigma(8) and the ratio of stellar to dark matter. Moreover, it is found that recent galaxy formation models can also account for the existence of such massive galaxies at z >= 5.
| Original language | English |
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| Title of host publication | AT THE EDGE OF THE UNIVERSE: LATEST RESULTS FROM THE DEEPEST ASTRONOMICAL SURVEYS |
| Editors | J Afonso, HC Ferguson, B Mobasher, R Norris |
| Place of Publication | SAN FRANCISCO |
| Publisher | ASTRONOMICAL SOC PACIFIC |
| Pages | 321-326 |
| Number of pages | 6 |
| ISBN (Print) | 978-1-58381-323-2 |
| Publication status | Published - 2007 |
| Event | Meeting on At the Edge of the Universe - Sintra Duration: 9 Oct 2006 → 13 Oct 2006 |
Conference
| Conference | Meeting on At the Edge of the Universe |
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| City | Sintra |
| Period | 9/10/06 → 13/10/06 |