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Emission line astrophysics at high z. What can we learn from the emission line spectra of (very) young star forming galaxies at high z? Colour-redshift loci determined predominantly by the emission lines Will appear as Lyman forest dropouts at high z - PowerPoint PPT Presentation
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June 2004, RAEF GOODS science 1
Emission line astrophysics at high z
What can we learn from the emission line spectra of (very) young star forming galaxies at high z?
Colour-redshift loci determined predominantly by the emission lines
Will appear as Lyman forest dropouts at high z
Indicators of chemical abundances and IMF of ionizing stars
Towards Pop III?
June 2004, RAEF GOODS science 2
GOODS CDF-S BViz
June 2004, RAEF GOODS science 3
GOODS ACS (V1.7) #6746
zAB = 24.43
z = 5.6
r ~ 1kpc
cf. Lynx
F814WAB = 23.1
z = 3.36
m(z)=1.32
Ly
NIV] CIV
June 2004, RAEF GOODS science 4
The nebular continuum (light blue line) is simply scaled from the observed H flux with no reddening
S99 population models are for 107 Msun with a Salpeter IMF ( = 2.35; 1–100Msun) and Z/Zsun = 0.05
They produce ~ 20 x too few ionizing photons
