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Emission line astrophysics at high z

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

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Emission line astrophysics at high z

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  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? GOODS science

  2. GOODS CDF-S BViz GOODS science

  3. GOODS ACS (V1.7) #6746 • zAB = 24.43 • z = 5.6 • r ~ 1kpc • cf. Lynx • F814WAB = 23.1 • z = 3.36 • Dm(Dz)=1.32 Lya NIV] CIV GOODS science

  4. The nebular continuum (light blue line) is simply scaled from the observed Hb flux with no reddening S99 population models are for 107 Msun with a Salpeter IMF (a = 2.35; 1–100Msun) and Z/Zsun = 0.05 They produce ~ 20 x too few ionizing photons GOODS science

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