XXIVth IAP Colloquium

Far away : light in the young universe at redshift beyond three

Monday July 7 to Friday July 11, 2008

List of SHAPLEY's Presentation(s) ( Updated 20/01/2011 15:13:23 )

Precise if your presentation is oral or a poster : oral
Title of your presentation : Imaging Lyman Continuum Emission from Galaxies at z~3

Determining the contribution of galaxies
to the reionization of the universe is a fundamental
goal for studies of the intergalactic medium (IGM), and
galaxy formation and evolution. A direct measurement of
ionizing radiation escaping from galaxies is not
possible at the epoch of reionization, due to the
high optical depth of the IGM, and therefore
observations of this process at slightly lower redshift
are crucial for understanding what happens at z~6.
We have unambiguously detected Lyman continuum
emission in the spectra of individual star-forming
galaxies at z~3. We now present narrow-band images
of these targets that probe the same rest-frame Lyman
continuum wavelength region, just below 912 AA. These new images
illustrate some intriguing differences in the spatial
distributions of ionizing and non-ionizing
radiation, and Lyman-alpha emission, and offer
important clues as to the factors modulating the
escape of Lyman continuum radiation from galaxies.

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