Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-02-13
Publ.Astron.Soc.Jap. 55 (2003) L41
Astronomy and Astrophysics
Astrophysics
Scientific paper
Using the values of the cosmological parameters obtained from Wilkinson
Microwave Anisotropy Probe (WMAP) and the cosmological chemical clock observed
by high-redshift quasars, it is shown that star formation should have started
by the redshift $z_F > 9.5$, and that $z_F$ is sensitive only to $\omegamz h^2$
in flat $\Lambda$CDM cosmology.
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