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LBG properties from z~3 to z~6

We analyse the spectral energy distribution (SED) of U, B, V and i-dropout samples from GOODS-MUSIC and we determine their physical properties, such as stellar age and mass, dust attenuation and star formation rate (SFR). Furthermore, we examine how the strength of Lyα emission can be constrained from broad-band SED fits instead of relying in spectroscopy. We use our SED fitting tool including the effects of nebular emission and we explore different star formation histories (SFHs). We find that SEDs are statistically better fitted with nebular emission and exponentially decreasing star formation. Considering this result, stellar mass and star formation rate (SFR) estimations modify the specific SFR (SFR/Mstar) - redshift relation, in comparison to previous studies. Finally, our inferred Lyα properties are in good agreement with the available spectroscopic observations.

preprint2011arXivOpen access
Stephane de BarrosDaniel SchaererDaniel P. Stark
astro-ph.CO
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Stephane de BarrosDaniel SchaererDaniel P. Stark

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