Joris Witstok
@joriswitstok.bsky.social
Looking up at the stars at the Cosmic Dawn Center (DAWN), Niels Bohr Institute, University of Copenhagen. Previously at Kavli Institute for Cosmology, University of Cambridge, University of Leiden. (He/him) 🇪🇺🇳🇱🇬🇧🇩🇰
Using the James Webb Space Telescope (JWST), we identified bright hydrogen emission from a galaxy at an unexpectedly early time in cosmic history. But why is this result so surprising?
Image credits: ESA/Webb, NASA, CSA, STScI, J. Olmsted (STScI), S. Carniani (Scuola Normale Superiore), P. Jakobsen
Image credits: ESA/Webb, NASA, CSA, STScI, J. Olmsted (STScI), S. Carniani (Scuola Normale Superiore), P. Jakobsen
March 27, 2025 at 3:41 PM
Using the James Webb Space Telescope (JWST), we identified bright hydrogen emission from a galaxy at an unexpectedly early time in cosmic history. But why is this result so surprising?
Image credits: ESA/Webb, NASA, CSA, STScI, J. Olmsted (STScI), S. Carniani (Scuola Normale Superiore), P. Jakobsen
Image credits: ESA/Webb, NASA, CSA, STScI, J. Olmsted (STScI), S. Carniani (Scuola Normale Superiore), P. Jakobsen
Proud to have been part of Katherine's first PhD paper 👏👏 Her detailed study of a distant galaxy reveals what is likely an ongoing merger in a complex system containing both young and old stellar populations with new evidence for the presence of small carbonaceous grains – read more below!
March 3, 2025 at 11:51 AM
Proud to have been part of Katherine's first PhD paper 👏👏 Her detailed study of a distant galaxy reveals what is likely an ongoing merger in a complex system containing both young and old stellar populations with new evidence for the presence of small carbonaceous grains – read more below!
Had a wonderful time visiting the Kapteyn Astronomical Institute in Groningen last week. Congratulations to Roberto for being this year’s Blaauw professor and thanks to everyone at Kapteyn for your hospitality!
November 22, 2024 at 11:06 AM
Had a wonderful time visiting the Kapteyn Astronomical Institute in Groningen last week. Congratulations to Roberto for being this year’s Blaauw professor and thanks to everyone at Kapteyn for your hospitality!
Looking forward to learning more about the origin and fate of cosmic dust this week in Gothenburg ✨ #CosmicDustSweden2023
September 25, 2023 at 8:51 AM
Looking forward to learning more about the origin and fate of cosmic dust this week in Gothenburg ✨ #CosmicDustSweden2023