GN-z11 paper day 🧵: With Callum Witten, Nicolas Laporte and the JADES collaboration we analysed the latest NASA Webb Telescope ESA Webb Telescope DDT data from the NIRSpec IFU. And we found a Lyman-alpha halo around z=10.603 galaxy! How cool is that! arxiv.org/abs/2306.09142

🆕 Webb has found the origin of a mysterious light from some of the earliest galaxies 🕯️🌌. Read more: esawebb.org/news/weic2402/ or 🧵👇

The NASA/ESA/CSA James #Webb Space Telescope has solved one of the most puzzling mysteries in astronomy using galaxy mergers! Previously, astronomers didn't know why we detect light from hydrogen atoms which should have been entirely blocked by the pristine gas that formed after

The unmatched resolution and sensitivity of James Webb has revealed, for the first time, what lies in the local environment of galaxies in the very early Universe. New research by IoA PhD student Callum Witten, published today in Nature Astronomy. ast.cam.ac.uk/content/webb.r…

The unmatched resolution and sensitivity of James Webb has revealed, for the first time, what lies in the local environment of galaxies in the very early Universe. New research by KICC PhD student Callum Witten, published today in Nature Astronomy. ast.cam.ac.uk/content/webb.r…

A combo of JWST/NIRCam observations & magnetohydrodynamic simulations suggests that frequent mergers with close companions give rise to bursty star formation and hence the unexpectedly high Ly-α emission detected from early galaxies. Callum Witten et al.: nature.com/articles/s4155…

Wolfson college PhD student has helped solve an early Universe mystery shar.es/aggq5Q Cambridge University Institute of Astronomy, Cambridge