Discovery of a z = 6.17 galaxy from CFHT and VLT observations - Archive ouverte HAL
Article Dans Une Revue Astronomy & Astrophysics - A&A Année : 2003

Discovery of a z = 6.17 galaxy from CFHT and VLT observations

Résumé

We report the discovery of a galaxy at a redshift z = 6.17 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 Lyalpha 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 Lyalpha at z = 6.17. This galaxy was selected from its continuum emission in the 920 nm filter and not from its Lyalpha emission, in effect performing a Lyman Break detection at z = 6.17. We estimate a star formation rate of several tens of Msun 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.
Fichier principal
Vignette du fichier
aafd013.pdf (231.54 Ko) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03742625 , version 1 (08-09-2022)

Identifiants

Citer

Jean-Gabriel Cuby, Olivier Le Fèvre, Henry J. Mccracken, Jean-Charles Cuillandre, Eugene A. Magnier, et al.. Discovery of a z = 6.17 galaxy from CFHT and VLT observations. Astronomy & Astrophysics - A&A, 2003, 405, pp.L19-L22. ⟨10.1051/0004-6361:20030760⟩. ⟨hal-03742625⟩
46 Consultations
14 Téléchargements

Altmetric

Partager

More