Astrophysicist. Loves being lost and how alive it feels. Enjoys witnessing courageous authenticity and random acts of kindness.
Leiden, the Netherlands
Joined July 2019
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🇺🇦 Rychard Bouwens #IStandWithUkraine retweeted
Little Red Dots (LRDs) have unique properties, motivating new mass estimators for their central engines. We explore ways to derive their central engine masses. Our results are consistent with LRDs hosting black hole seeds as massive as single supermassive stars (SMSs). 🧵
arxiv.org/abs/2609.09274
🇺🇦 Rychard Bouwens #IStandWithUkraine retweeted
Successful launch of the Roman Space Telescope! Congrats to all who have worked so many years for this moment - and the best (the science!) is still to come!
🇺🇦 Rychard Bouwens #IStandWithUkraine retweeted
Then make the SAVE Act a straightforward voter ID law and make the Democrats eat it. But that's not what the SAVE Act is, which is why many Republican senators don't want to vote for it.
🇺🇦 Rychard Bouwens #IStandWithUkraine retweeted
FYI: GOP officials yesterday spread the word to right-aligned influences that if they said anything critical of Bondi that Bondi would use the DOJ against them personally.
🇺🇦 Rychard Bouwens #IStandWithUkraine retweeted
After today’s review of the Epstein files at the DOJ, I have a list of names I will be requesting the House Oversight Committee invite to testify and, if necessary, subpoena.
I have questions.
🇺🇦 Rychard Bouwens #IStandWithUkraine retweeted
After speaking with Chair Powell this morning, it’s clear the administration’s investigation is nothing more than an attempt at coercion. If the Department of Justice believes an investigation into Chair Powell is warranted based on project cost overruns—which are not unusual—then Congress needs to investigate the Department of Justice. The stakes are too high to look the other way: if the Federal Reserve loses its independence, the stability of our markets and the broader economy will suffer. My colleague, Senator Tillis, is right in blocking any Federal Reserve nominees until this is resolved.
apnews.com/article/federal-r…
🇺🇦 Rychard Bouwens #IStandWithUkraine retweeted
The Panamanian-flagged and Turkish-owned oil tanker, M/T MERSIN, alleged to be affiliated with the Russian Shadow Fleet, is currently sinking off the coast of Dakar, Senegal in Western Africa, after reportedly coming under attack overnight by several uncrewed surface vessels, in possibly the third attack in the last week by Ukrainian Intelligence Services against a tanker linked to Russia.
🇺🇦 Rychard Bouwens #IStandWithUkraine retweeted
We really, really do not want to establish a new norm where presidents authorize all sorts of unlawful acts while planning blanket pardons for all involved to escape jeopardy. We need a Constitutional amendment to restrict the pardon power.
🇺🇦 Rychard Bouwens #IStandWithUkraine retweeted
Watch Sydney McLaughlin-Levrone 🇺🇸 run a blistering 47.78s to win 400m GOLD at the World Championships!🥇
The fastest time in 40 years!!!!!
🥈 Marileidy Paulino 🇩🇴 47.98
🥉 Salwa Eid Naser 🇧🇠48.19
Amazingly, in addition to the PHOENIX ALMA large program that current Leiden PhD student Sander Schouws won, Leindert Boogaard another PhD student I was privileged to supervise (together with Paul van der Werf in 2021) also won an ALMA LP called HIDING on the Hubble Ultra
Deep Field. Included below is a link to the press release from Leiden University. This just goes to show what awesome PhD students we have in Leiden. I feel privileged to have been able to work with both for their PhDs.
universiteitleiden.nl/en/new…
Extremely excited to share that the PHOENIX team, led by PhD student Sander Schouws in Leiden, has been awarded 113 hours of ALMA time in Cycle 12—along with JWST MIRI spectroscopy! We’ll be targeting [OIII]88 and dust continuum in 15 of the brightest spectroscopically 1/n
ALMA cycles, refining and improving it every time. I’m incredibly proud to see his persistence, brilliance, and hard work pay off. Also thrilled to continue working with amazing colleagues from the REBELS team 3/n
🇺🇦 Rychard Bouwens #IStandWithUkraine retweeted
I'd tell you a Fibonacci joke but it's probably as bad as the last two you've heard combined.
🇺🇦 Rychard Bouwens #IStandWithUkraine retweeted
Interesting comparison of Euclid vs. Rubin imaging - first one I've seen! arxiv.org/abs/2507.01942
