On 5/18/18 1:50 PM, Bringfried Stecklum wrote:
On 16.05.2018 13:22, Steve Willner wrote:
A recent _Nature_ article
http://adsabs.harvard.edu/abs/2018Natur.555...67B
shows evidence that the first stars appeared by z=20, about 180 Myr
after the Big Bang. This is a preliminary result and still needs
confirmation, but it's quite intriguing. Unfortunately there does
not appear to be a free-access preprint of the article, but one of
the authors will be giving the CfA Colloquium this Thursday at 4 PM
EDT (UT-4). Colloquia are usually live-streamed; link at
https://www.cfa.harvard.edu/colloquia
or
https://www.youtube.com/channel/UCAp...xmiV95A0ChueYg
The latter link shows past colloquia but won't show the live stream
(if at all) until just a minute or two before the talk starts.

It looks the confirmation arrived quicker than thought. See ESO PR "The
onset of star formation 250 million years after the Big Bang"

https://www.eso.org/public/news/eso1815/

which also provides a link to the paper.

It is noted that Alan Rogers reports a dip in 21 cm absorption
that ended at 250 million years.
https://www.youtube.com/watch?v=yOq8I9b2SYI

Richard D Saam