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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Probing ∼L Lyman-break galaxies at z≈ 7 in GOODS-South with WFC3 on Hubble Space Telescope
Monthly Notices of the Royal Astronomical Society, Volume 403, No. 2, Year 2010
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Description
We analyse recently acquired near-infrared Hubble Space Telescope imaging of the Great Observatories Origins Deep Survey (GOODS)-South field to search for star-forming galaxies at z≈ 7.0. By comparing Wide Field Camera 3 (WFC3) 0.98 μm Y-band images with Advanced Camera for Surveys (ACS)z-band (0.85 μm) images, we identify objects with colours consistent with Lyman-break galaxies at z≃ 6.4-7.4. This new data cover an area five times larger than that previously reported in the WFC3 imaging of the Hubble Ultra Deep Field and affords a valuable constraint on the bright end of the luminosity function. Using additional imaging of the region in the ACS B,V and i bands from GOODS v2.0 and the WFC. 3J band, we attempt to remove any low-redshift interlopers. Our selection criteria yields six candidates brighter than YAB= 27.0, of which all except one are detected in the ACS z-band imaging and are thus unlikely to be transients. Assuming all six candidates are atz≈ 7, this implies a surface density of objects brighter than YAB= 27.0 of 0.30 ± 0.12 arcmin-2, a value significantly smaller than the prediction from z≈ 6 luminosity function. This suggests continued evolution of the bright end of the luminosity function betweenz= 6 and 7, with number densities lower at higher redshift. © 2010 The Authors. Journal compilation © 2010 RAS.
Authors & Co-Authors
Wilkins, Stephen M.
United Kingdom, Oxford
University of Oxford
Bunker, Andrew J.
United Kingdom, Oxford
University of Oxford
Ellis, Richard S.
United States, Pasadena
California Institute of Technology
Stark, Daniel P.
United Kingdom, Cambridge
University of Cambridge
Stanway, Elizabeth R.
United Kingdom, Bristol
University of Bristol
Lorenzoni, Silvio
United Kingdom, Oxford
University of Oxford
Jarvis, Matthew J.
United Kingdom, Hatfield
University of Hertfordshire
Statistics
Citations: 65
Authors: 7
Affiliations: 5
Identifiers
Doi:
10.1111/j.1365-2966.2009.16175.x
ISSN:
00358711
Study Design
Cross Sectional Study
Study Approach
Quantitative