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 Epoch of Re-ionization and or end of cosmic dark ages. 

Emission Lines from z=6.5 QSO - Role of AGN feedback in quenching star formation- important to EOR modeling - Maiolino+12  Using [CII] 158 um they got > 10 sigma detection of emission line at IRAM for z=6.5 QSO after 18.5 hours.  The observation of weak winds implies star formation, while the observation her eof powerful winds indicates AGN-driven powerful winds which quenches star formation.  

Using GRB080319 spectra to limit the neutral fraction at z= 6.7 Patel+10 http://adsabs.harvard.edu/abs/2010A%26A...512L...3P  



Probably this shouldn't be here but I don't have much anywhere on absorption lines from Lya clouds at high-z.  This section is not really relevant to GRB, it's just some keyword spam or something to lead to more useful info.  At random I saw a paper on high-z Lya clouds in quasars, I might start with that: Garzilli+12 ArXiv #: 1202.3577

Interesting Paper: James S. Dunlop    ArXiv #: 1205.1543    - I note that there are many erroneous reports of extreme z objects. 

Comments: Book Chapter, providing a thorough review of current knowledge of galaxies at redshifts z > 5. 71 pages, 28 figures, 314 references. To appear in "The First Galaxies - "Theoretical Predictions and Observational Clues", 2012 by Springer, eds. V. Bromm, B. Mobasher, T. Wiklind
I endeavour to provide a thorough overview of our current knowledge of high-redshift galaxies and their evolution during the first billion years of cosmic time, corresponding to redshifts z > 5. After first summarizing progress with the seven different techniques which have been used to date in the discovery of objects at z > 5, I focus thereafter on the two selection methods which have yielded substantial samples of galaxies at early times, namely Lyman-break and Lyman-alpha selection. I discuss a decade of progress in galaxy sample selection at z ~ 5 - 8, including issues of completeness and contamination, and address some of the confusion which has been created by erroneous reports of extreme-redshift objects...."
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