Three Ly alpha emitters at z ≈ 6: early GMOS/Gemini data from the GLARE project

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Three Ly alpha emitters at z ≈ 6: early GMOS/Gemini data from the GLARE project

Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/42739

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Title: Three Ly alpha emitters at z ≈ 6: early GMOS/Gemini data from the GLARE project
Author(s): Stanway, Elizabeth R.; Glazebrook, Karl; Bunker, Andrew J.; Abraham, R. G.; Hook, Isobel; Rhoads, James; McCarthy, Patrick J.; Boyle, Brian J.; Colless, Matthew; Crampton, David; Couch, Warrick J.; Jorgensen, Inger; Malhotra, Sangeeta; Murowinski, Richard; Roth, Kathy; Savaglio, Sandra; Tsvetanov, Zlatan I.
Abstract: 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′AB = 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.
Publication type: Journal article
Source: Astrophysical Journal Letters, Vol. 604, no. 1 (Mar 2004), pp. L13-L16
Publication year: 2004
Keyword(s): Emission; Evolution; Field galaxies; Formation; Galaxies; High-redshift galaxies; Lyman-break galaxies; Origins deep survey; Redshift; Spectroscopic confirmation; Starburst galaxies; Universe
Publisher: University of Chicago
ISSN: 0004-637X
Publisher URL: http://dx.doi.org/10.1086/383523
Peer reviewed