Matthieu Schaller

Associate Professor of Cosmology at University of Oxford Recruiting now: Associate Professor of Cosmology on jobs.ac.uk. Click for details and explore more academic job opportunities on the top job board

Cosmologists! We have a faculty job going here in Oxford - happy to answer questions. Brief version is that this remains a great & collaborative place to do science and the students are superb. 🔭 www.jobs.ac.uk/job/DOP628/a...

Pittsburgh's cathedral of learning has switched on the batsignal to gather all the world's cosmologists ahead of next week's conference.

One especially nice result from @swiftsimulation.bsky.social -based simulations run by students attending the Ex-Gal galaxy simulation summer school in Durham last week.

Sometimes, we have to go to the computer room and push the bytes around in the machine by hand.

📢Leiden Institute of Physics (LION) is #hiring a faculty member in experimental quantum physics (tenure-track, Asst. Prof. level, higher possible). Join us in exploring the limits of #quantummechanics! Apply by Oct 5, 2025 👉 edu.nl/hyt88

Spending the day at LJMU for the 5 year anniversary of their computing centre.

The conference room alone is worth the trip.

The first paper (arxiv.org/abs/2508.21126) presenting our new set of galaxy formation simulations is now out!

This is the culmination of years of work by a large team.

The COLIBRE project will hopefully be a new milestone in the physics included in large-scale galaxy simulations.

(Sound on!)

The sophisticated COLIBRE simulations finally land on the arXiv: arxiv.org/abs/2508.21126. Treating these with sonification, we can get new intuition for galaxy evolution to augment our visuals. Sound on for the explainer vid, visit the site for more! colibre.strw.leidenuniv.nl/videos.html 🔭🧪

More information, maps, videos, and images at www.colibre-simulations.org

The first paper (arxiv.org/abs/2508.21126) presenting our new set of galaxy formation simulations is now out!

This is the culmination of years of work by a large team.

The COLIBRE project will hopefully be a new milestone in the physics included in large-scale galaxy simulations.

(Sound on!)

A bit of astrophotography with a 6-months long single exposure over Randogne, Switzerland showing the path of the Sun over the Alps.

@solarcan.bsky.social

Oh very nice one with the trees in the foreground

Same data but with a slightly different processing of the colours

A bit of astrophotography with a 6-months long single exposure over Randogne, Switzerland showing the path of the Sun over the Alps.

@solarcan.bsky.social

Über 150 internationale Wissenschaftlerinnen und Wissenschaftler diskutieren diese Woche am AIP beim 18. Potsdamer Thinkshop. Der Thinkshop mit dem Titel „The Role of Feedback in Galaxy Formation“ bietet Raum für neue Ideen und interdisziplinäre Zusammenarbeit. 💫

#astrophysics #galaxy #potsdam

Take a whistle stop tour of @esa.int’s Euclid mission exhibit at this year’s GoodWood #FestivalOfSpeed with James, an Outreach Co-ordinator at The University of Edinburgh… (1/6) 🧵

@runningastronomer.bsky.social gets the universe back on track for day 3 at the Goodwood festival of speed

The universe is in progress

We ran a randomized controlled trial to see how much AI coding tools speed up experienced open-source developers.

The results surprised us: Developers thought they were 20% faster with AI tools, but they were actually 19% slower when they had access to AI than when they didn't.

UK astronaut Tim Peake is being introduced to the mysteries of the Universe via our @swiftsimulation.bsky.social code running a live simulation

Let's go!

Being rude is how we defeat the machines

Adding the word ‘fucking’ to your Google search query disables the unwanted AI summary at the top of the results page.

How many more to entice you to join us? :)

Simulated galaxies from the new model are 🤩🤩

Seminar today at the Oskar Klein Center in Stockholm

Utrecht physics theory group consumes enough pizza that they have dedicated garbage bins

⚡️Are you into stellar streams, galaxies and dark matter?

We’re offering a JAE Intro 2025 #research #scholarship at
@ifca.es

🔍 Topic: Analysis of stellar streams
📍 Location: Santander, Spain
⏳ Duration: 7 months
💶 Grant: 600 €/month
🔗 goo.su/nsUJk

@csic.es @csicdivulga.bsky.social

New paper on the arXiv based on our cosmological simulation work!

Link: arxiv.org/abs/2504.15633

We use the flamingo runs to construct a simple analytic expression for the baryon correction to the matter power spectrum. Having a quick, but accurate enough, estimate is key for the analysis of data

New paper on the arXiv based on our cosmological simulation work!

Link: arxiv.org/abs/2504.15633

We use the flamingo runs to construct a simple analytic expression for the baryon correction to the matter power spectrum. Having a quick, but accurate enough, estimate is key for the analysis of data