I’m currently in a talk by Richard Ellis of Caltech as part of this
Now talking about work by graduate student Dan Spark to look for objects at a redshift of 10. First, look for galaxy clusters and look for faint things within them, in the hope that you’ll see distant objects which have been magnified by their light’s passage through the foreground cluster.
…they found lots of faint candidates. Now they have to show that the emission is really from a galaxy at that distance…Oh, very nice. As well as magnifying the galaxies, the lensing by the foreground cluster moves the position of the galaxy, and this depends on distance. Using this fact and lots more observing time they can attempt to rule out other possibilities. This distance does depend, for now, on the detection of a single spectral line, however.
Here’s the image
Is it surprising that so many were seen? Work with Avi Loeb (a theorist) seems to show that there are about 2-3 times more of these than predicted, but can make the star formation more efficient to solve this problem. And that seems to be it – I hope it’s true so I can say I was here, but it would be nice (As Richard said) to have a little more confirmation.