2003/03/31 by J.-G. Cuby, J. -G. Cuby, O. Le Fèvre +6 · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Galaxies: Formation, Evolution, Phenomena #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1051/0004-6361:20030760
published as Astron.Astrophys.405:L19,2003 · 4 pages, 3 figures, letter. Revised after referee comments. Accepted for publication in A&A
arxiv created 2003/05/19 · openalex publication_date 2003/06/19 · arxiv updated 2011/05/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We report the discovery of a galaxy at a redshift identified from deep narrow band imaging and spectroscopic follow-up in one of the CFHT-VIRMOS deep survey fields at 0226-04. In addition to the existing deep BVRI images of this field, we obtained a very deep narrow band image at 920 nm with the aim of detecting Lyα emission at redshift ~6.5. Spectroscopic follow-up of some of the candidates selected on the basis of their excess flux in the NB920 filter was performed at the VLT-UT4 with the FORS2 instrument. For one object a strong and asymmetric emission line associated with a strong break in continuum emission is identified as Lyα at . This galaxy was selected from its continuum emission in the 920 nm filter and not from its Lyα emission, in effect performing a Lyman Break detection at . We estimate a star formation rate of several tens of yr-1 for this object, with a velocity dispersion ~400 km s-1. The spectroscopic follow-up of other high z galaxy candidates is on-going.