2003/12/31 by E. R. Stanway, Elizabeth R. Stanway, Karl Glazebrook +23 · 4 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Galaxies: Formation, Evolution, Phenomena #Gamma-ray bursts and supernovae #astro-ph
paper · pdf · doi:10.1086/383523
published as Astrophys.J.604:L13-L16,2004 · 5 pages, 2 figures. Revised to match accepted version
openalex publication_date 2004/02/23 · arxiv created 2004/03/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
We report spectroscopic detection of three z ~ 6 Lyα-emitting galaxies, in the vicinity of the Hubble Ultra Deep Field, from the early data of the Gemini Lyman Alpha at Reionisation Era (GLARE) project. Two objects, GLARE 3001 ( z = 5.79) and GLARE 3011 ( z = 5.94), are new detections and are fainter in z ' ( z = 26.37 and 27.15) than any Lyman break galaxy previously detected in Lyα. A third object, GLARE 1042 ( z = 5.83), has previously been detected in line emission from the ground; we report here a new spectroscopic continuum detection. Gemini/GMOS-South spectra of these objects, obtained using nod and shuffle, are presented together with a discussion of their photometric properties. All three objects were selected for spectroscopy via the i -drop Lyman break technique, the two new detections from the GOODS version 1.0 imaging data. The red i '- z ' colors and high equivalent widths of these objects suggest a high-confidence z > 5 Lyα identification of the emission lines. This brings the total number of known z > 5 galaxies within 9' of the Hubble Ultra Deep Field to four, of which three are at the same redshift ( z = 5.8 within 2000 km s -1 ), suggesting the existence of a large-scale structure at this redshift.