Cosmic star formation history: high z galaxies and black holes
J. Bergeron ^1
1 Institut d'Astrophysique de Paris-CNRS, France
We review the status of galaxy and QSO searches at 3 < z < 6 and outline the constraints on the evolution of the luminosity function of these two populations. Searches for higher z galaxies are presented together with the evolution of the star formation rate of Lyman break selected galaxies.

A major population responsible for cosmic re-ionization is starburst galaxies. Searches for the first objects will require dedicated facilities other than ELTs for rare sources (QSOs and transient objects). Samples of z ~ 7-15 galaxies could be obtained with ELTs and should also be drawn from JWST surveys. A unique specific goal of ELTs is the spectroscopic identification of z > 7 galaxies to derive their star formation rate, dynamics and clustering properties. The implied ELT requirements are outlined.

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