iiinova — where your digital self keeps evolving

Reposted by Joris Witstok

Lorentz Center @lorentzcenter.bsky.social · 23/02/2026

The goal of this workshop is to connect the chemical fossil records of nearby galaxies with the latest observations of galaxies in the early Universe. bit.ly/46irYz5 @joriswitstok.bsky.social

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Reposted by Joris Witstok

Cosmic Dawn Center @cosmicdawncenter.bsky.social · 15/01/2026

DAWN on the front page of Nature! 😃 The enigmatic population of galaxies, known as "little red dots" discovered by James Webb may finally have an explanation. 🇬🇧 nbi.ku.dk/english/news... 🇩🇰 nbi.ku.dk/Nyheder/nyhe...

nbi.ku.dk

Copenhagen researchers make the front page of Nature: Solving the mystery of the universe's ‘little red dots’

Since the James Webb Space Telescope (JWST) went into operation, red dots in its images have puzzled researchers around the world. Now, researchers from the University of Copenhagen have explaine...

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Reposted by Joris Witstok

Cosmic Dawn Center @cosmicdawncenter.bsky.social · 23/06/2025

Currently watching the first light from @vrubinobs.bsky.social’s 3200 megapixel camera 🤩

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Reposted by Joris Witstok

Astrobites @astrobites.bsky.social · 21/04/2025

From Niloofar Sharei @astroneal.bsky.social : What do you get when baby galaxies crash and light up in UV? A surprising early signature of cosmic dust. 🔭✨☄️ astrobites.org/2025/04/21/dust-ahead-of-schedule-uv-bump/

astrobites.org

Dust Ahead of Schedule: The Surprising UV Bump in a Galaxy at Cosmic Dawn

What do you get when baby galaxies crash and light up in UV? A surprising early signature of cosmic dust.

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Romain Meyer @astrorameyer.bsky.social · 04/04/2025

🧵 Today is paper day for me! Usually I don’t post about papers but I have a special soft spot for this one: the detection of the Gunn-Peterson trough in high-redshift *galaxies* !! arxiv.org/abs/2504.02683 #astrosci #extragalactic #cosmology

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Reposted by Joris Witstok

Nature Portfolio @natureportfolio.nature.com · 27/03/2025

A paper in Nature reports observations from the JWST showing one of the earliest known galaxies caught in the act of reionization. The observations place the onset of cosmic reionization to at least 330 million years after the Big Bang. go.nature.com/4hLNK12 🧪 🔭

This is figure 1, which shows NIRCam and NIRSpec/PRISM observations of JADES-GS-z13-1-LA.

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Reposted by Joris Witstok

Cosmic Dawn Center @cosmicdawncenter.bsky.social · 27/03/2025

Earliest sign of the Universe becoming transparent discovered with #JamesWebb. @joriswitstok.bsky.social et al. detected the escape of your fav UV light, Lyman α, the signature of an ionized bubble, only 330M years after the Big Bang. 🇬🇧 cosmicdawn.dk/news/james-w... 🇩🇰 cosmicdawn.dk/news-in-dani...

cosmicdawn.dk

James Webb opdager tidligste tegn på at Universet bliver gennemsigtigt - Cosmic Dawn Center

Universets første galakser blev født indhyllet i en “tåget” gas, og kunne ikke ses tydeligt før denne tåge var lettet. Ved hjælp af rumteleskopet James Webb har et internationalt hold af forskere, led...

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Space Telescope Science Institute @stsci.edu · 27/03/2025

Using the unique infrared sensitivity of #NASAWebb, researchers can examine ancient galaxies to probe secrets of the early universe. Recently, a bright hydrogen emission from a galaxy in an unexpectedly early time in the universe’s history has been identified. (1/4) 🧵 🔭 🧪

A small red dot is in the middle of the image. To its upper left is a face-on spiral galaxy, and to its lower right is an edge-on spiral galaxy. A handful of other small background galaxies are seen against the black background of space.

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Reposted by Joris Witstok

ESA Space Science @science.esa.int · 26/03/2025

Astronomers have identified powerful hydrogen emission in one of the most distant galaxies known — a probable sign that we are seeing some of the first hot stars from the dawn of the Universe ✨ All thanks to the NASA/ESA/CSA James #Webb Space Telescope. Read more 👉 www.esa.int/Science_Expl... 🔭🧪☄️

An area of deep space is covered by a scattering of galaxies in many shapes and in colours ranging from blue to whitish to orange, as well as a few nearby stars. A very small square is shown zoomed in, in a box to the left. In the centre a red dot, a faraway galaxy, is marked out by lines and labelled “Redshift (z)=13”, signifying its extreme distance. Two much larger galaxies are labelled “z=0.63” and “z=0.70”. The box is titled “JADES-GS-z13-1”.

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Reposted by Joris Witstok

ESO @eso.org · 20/03/2025

📣 Using ALMA 📡, in which ESO is a partner, astronomers have discovered oxygen in the most distant known galaxy! This record-breaking detection is making scientists rethink how quickly galaxies formed in the early Universe 🤔 Read more: www.eso.org/public/news/... 🔭 🧪 ☄️

eso.org

Oxygen discovered in most distant known galaxy

Two different teams of astronomers have detected oxygen in the most distant known galaxy, JADES-GS-z14-0. The discovery, reported in two separate studies, was made possible thanks to the Atacama…

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Joris Witstok @joriswitstok.bsky.social · 03/03/2025

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!

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Joris Witstok @joriswitstok.bsky.social · 11/02/2025

How do we learn about the anatomy of the most distant galaxy we currently know of? 🩻 Read more below! 👇

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Joris Witstok @joriswitstok.bsky.social · 22/11/2024

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!

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Joris Witstok @joriswitstok.bsky.social · 27/11/2023

Reminder about next year's conference on obscured star formation at the Kavli Institute for Cosmology, Cambridge (22-26 April), organised by Jan Scholtz and me. Abstract submission closes soon! sites.google.com/cam.ac.uk/sf...

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Joris Witstok @joriswitstok.bsky.social · 25/09/2023

Looking forward to learning more about the origin and fate of cosmic dust this week in Gothenburg ✨ #CosmicDustSweden2023

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Joris Witstok @joriswitstok.bsky.social · 07/09/2023

Jan Scholtz, myself et al. are excited to announce an upcoming conference at the Kavli Institute for Cosmology. "Raising the veil on star formation near and far" is a meeting dedicated to Richard Hills, remembering his contributions to understanding obscured star formation across cosmic time:

sites.google.com

Star Formation 2024

A hybrid (online & on-site) meeting focusing on hidden and elusive star formation, from the local Universe to high redshift, and an occasion to remember Richard Hills

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