Although a galaxy a z=10 has important implications, this 'detection' is near-IR spectrsocopy, which is very difficult to reduce correctly due noise issues etc. You might be interested in these two papers (now both peer-reviewed and published/in press) which both fail to confirm any detection...
Although a galaxy a z=10 has important implications, this 'detection' is near-IR spectroscopy, which is very difficult to reduce correctly due noise issues etc. You might be interested in these two papers (now both peer-reviewed and published/in press) which both fail to confirm any detection...