Probing ∼L* Lyman-break galaxies at z≈ 7 in GOODS-South with WFC3 on Hubble Space Telescope
Wilkins, Stephen M., Bunker, Andrew J. (Andrew John), Ellis, Richard S. (Richard Salisbury), 1950-, Stark, D. (Daniel), Stanway, Elizabeth R., Chiu, Kuenley, Lorenzoni, Silvio and Jarvis, Matt J.. (2010) Probing ∼L* Lyman-break galaxies at z≈ 7 in GOODS-South with WFC3 on Hubble Space Telescope. Monthly Notices of the Royal Astronomical Society, Vol.403 (No.2). pp. 938-944. ISSN 0035-8711Full text not available from this repository.
Official URL: http://dx.doi.org/10.1111/j.1365-2966.2009.16175.x
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 WFC3J 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 at z≈ 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 between z= 6 and 7, with number densities lower at higher redshift.
|Item Type:||Journal Article|
|Subjects:||Q Science > QB Astronomy|
|Divisions:||Faculty of Science > Physics|
|Library of Congress Subject Headings (LCSH):||Galaxies -- Evolution, Galaxies -- Formation, Red shift, Starbursts, Ultraviolet astronomy|
|Journal or Publication Title:||Monthly Notices of the Royal Astronomical Society|
|Page Range:||pp. 938-944|
|Funder:||Science and Technology Facilities Council (Great Britain) (STFC), Research Councils UK (RCUK), European Community (EC)|
|Grant number:||PITN-GA-2008-214227 (EC)|
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