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The Metagalactic Ultraviolet Background Jennifer E. Scott

The Metagalactic Ultraviolet Background Jennifer E. Scott. Redshift evolution of Ly a absorbers flattens with redshift. Weymann et al. 1998 Kim et al. 2001 Dobrzycki et al. 2002. Evolution primarily driven by evolution in UVB. Dave et al. 1999. The Proximity Effect c lassical method.

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362 views • 35 slides

Gerard Kriss STScI

FUSE and HST Observations of Helium II Absorption in the IGM: Implications for Seeing HI Re-ionization. Gerard Kriss STScI. What We Can Learn from Observations of He II Absorption. Use the ratio of He II and H I column densities to ascertain the shape of the ionizing spectrum.

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293 views • 20 slides

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The Metagalactic Ultraviolet Background Jennifer E. Scott

Gerard Kriss STScI