Looking for z>7 galaxies with the Gravitational Telescope

R. Pello , J. Richard , D. Schaerer , J. F. Le Borgne , J. P. Kneib (1) , A. Hempel

1 LAM - Laboratoire d'Astrophysique de Marseille

We summarize the main results obtained recently by our group on the identification and study of very high-z galaxies (z>7) using lensing clusters as natural gravitational telescopes. A description of our pilot survey with ISAAC/VLT is presented, aimed at the spectroscopic confirmation of z>7 candidate galaxies photometrically selected from deep near-IR, HST and optical ground-based imaging. The first results issued from this survey are discussed, in particular the global photometric properties of our high-z candidates, and the implications for the global star formation rate at very high-z.

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]

R. Pello, J. Richard, D. Schaerer, J. F. Le Borgne, J. P. Kneib, et al.. Looking for z>7 galaxies with the Gravitational Telescope. 2005. ⟨hal-00082951⟩