Cosmic Dawn Center

The 150 spectra include
🌀 new deep spectroscopy of 10 key targets,
🌀 weak Hα+absorption features
🌀 2 AGNs out of 10 key targets
🌀 new Dn4000/UVJ insights

This is just the start — deep dives into stellar ages, dynamics, & more coming soon.

A public data release is also planned.

Just out: the #DeepDive survey; a new JWST program to uncover how massive galaxies quenched at z ~ 3–5.

The first results include spectra of 150 quiescent galaxies.

Big thanks to Danmark Frie Forsningsfond/Sapere Aude & @dg.dk for their support!
arxiv.org/abs/2506.22642

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

The COSMOS-Web team — including several DAWNers — has just released their full field of 780,000 galaxies.

Ethan @startswithabang.bsky.social Siegel provides a great overview of the survey.

You can also explore the field yourself in this interactive map: cosmos2025.iap.fr/fitsmap.html

Galactic dust reveals hidden patterns in stunning new images from James Webb Using the James Webb Space Telescope, a team of researchers led by a Danish bachelor student has uncovered surprising new details about the fine structure of cosmic dust in nearby galaxies.

Bachelor student Charlie Lind-Thomsen led this project, zooming in on astonishing details of dust clouds in nearby galaxies:
🇬🇧 nbi.ku.dk/english/news...
🇩🇰 nbi.ku.dk/Nyheder/nyhe...
@dg.dk

First light from student-built radio telescope - Cosmic Dawn Center During the last six months, academic employee Gaurav Kumar, together with master students Kaj Grimstrup, Liazhe Li, and Omar Rashdan, have built two radio telescopes. One of them now observed its firs...

Behold the homemade 1.9 m radio telescope, built by DAWNers Gaurav, Kaj, Jiazhe, and Omar📡

The telescope received its first light last week, where the team was able to observe neutral hydrogen in the Milky Way from the institute's backyard.
cosmicdawn.dk/news/first-l...
@dg.dk

Associate Professor Claudia Lagos - Pawsey Medal 2025 This is "Associate Professor Claudia Lagos - Pawsey Medal 2025" by Australian Academy of Science on Vimeo, the home for high quality videos and the people…

Huge congrats to @cdplagos.bsky.social who has just been awarded the Pawsey Medal by the @science.org.au for her research in galaxy evolution! 🏆

The Medal is awarded to early career scientists for outstanding achievements in physics.
vimeo.com/1064968475/0...

Interview med Chamilla Terp, Cosmic Dawn Center (DAWN) DK: Hun faldt som en lysende stjerne ned fra himlen med en opdagelse, der gav genlyd i den astrofysiske verden. Chamilla Terp har løst en gåde, som…

✨Chamilla Terp has unraveled a puzzle that experienced astrophysicists have long struggled to solve. Meet Chamilla and learn more about her dreams and daily life as a young astrophysicist. @cosmicdawncenter.bsky.social
vimeo.com/1072508414

Kasper Elm Heintz among Berlingske’s Top 100 Talents - Cosmic Dawn Center Congratulations to Kasper Elm Heintz, assistant professor at the Cosmic Dawn Center, who has been selected as one of the top 100 talents in Denmark 2025 in Berlingske’s annual award for his discoverie...

Congratulations to @kosmoskasper.bsky.social on being among the top 100 talents in Denmark 🥳
cosmicdawn.dk/news/kasper-...
@dg.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...

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...

For instance, Shuntov et al. show how the galaxies' dark matter halos initially outpace galaxy assembly.

However, as accretion of gas and dark matter begins to slow down after some 1.5–2 billion years, halo growth stagnates while accumulated gas reservoirs keep star formation going.

James Webb giver ny indsigt i galaksernes vækst og deres mørke stof - Cosmic Dawn Center Kortlægning af en kosmisk historie: Et internationalt hold af forskere, ledet af astronomer på Cosmic Dawn Center i København, har udgivet et omfattende studie af, hvordan galakser og deres mørke stof...

In an extensive study on galaxy evolution through cosmic time, Marko Shuntov presents a plethora of interesting result, including how the total mass of the galaxies' stars and dark matter are related?

🇬🇧 cosmicdawn.dk/news/new-ins...
🇩🇰 cosmicdawn.dk/news-in-dani...
@dg.dk

Time for the annual followup meeting with our main funding body, the Danish National Research Foundation.

We're delighted to have this opportunity to discuss not only our own research, but also the Foundation's interests, as well as this year's focus: "Fair recognition of contributions to research"