Primordial Proto-Galaxies

Details Primordial Proto-Galaxies Primordial Proto-Galaxies

1999-10-29

arxiv.org/abs/astro-ph/9910529v1

Astronomy and Astrophysics

Astrophysics

Submitted to MNRAS

Scientific paper

The first stars to form in protogalaxies must have primordial chemical composition. We refer to a protogalaxy that is forming stars of primordial composition, or very low metallicity ($Z\le 0.01 Z_{\odot}$), as ``Primordial Proto-Galaxy'' (PPG). PPGs contain little or no dust, and therefore their spectral energy distribution can be modelled from the rest-frame ultraviolet to the infrared without accounting for dust extinction and emission. We present the results of computing the photometric properties of high redshift PPGs at near-d-to-mid infrared wavelengths, that will soon be available with the new generation of infrared space telescopes, such as SIRTF and the NGST. We show that: i) PPGs at very high redshift (5

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