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Prof Anna Watts

@profannawatts.bsky.social
10K followers 520 following 913 posts

Professor of Astrophysics @ Univ. of Amsterdam. Neutron stars, pulsars, dense matter, X-ray astronomy. Mom, Migrant. "Particles in stars blah blah". Does science with NICER on the International Space Station and schemes for EVEN BIGGER SPACE TELESCOPES.

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Prof Anna Watts @profannawatts.bsky.social · 03/10/2026
I do love my city - where despite having the largest bicycle park in the world we actually need EVEN MORE. #greencityproblems #utrecht www.duic.nl/algemeen/alg...
duic.nl
Grootste fietsenstalling ter wereld niet groot genoeg voor Utrecht: gemeente werkt aan uitbreiding
De fietsenstalling onder het Stationsplein in Utrecht mag dan wel de grootste ter wereld zijn, steeds vaker staat de stalling tot de nok toe gevuld.
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Dutch News @dutchnewsnl.bsky.social · 02/10/2026
Dutch royal house earned nearly half a billion from slavery www.dutchnews.nl?p=273439
dutchnews.nl
Dutch royal house earned nearly half a billion from slavery - DutchNews.nl
The Dutch royal family, the House of Orange-Nassau, earned an estimated €576 million from slavery, mostly in the former Dutch East Indies, according to a new investigation into the monarchy. The…
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arXiv @arxiv.bsky.social · 01/10/2026
arXiv has updated our policy on rate limiting for all submitters. This update was made to fairly distribute moderator time & support the arXiv community of staff, volunteers, readers & authors. Please read our announcement to learn more: blog.arxiv.org/2026/10/01/updated-r…
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Prof Anna Watts @profannawatts.bsky.social · 01/10/2026
Been doing neutrinos with my Astrophysics class, this is a very cool new result! physics.aps.org/articles/v19...
physics.aps.org
Gallium Anomaly May Finally Be Explained
A decades-old neutrino mystery might be solved not by undiscovered physics but by improved calculations.
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maura quint @mauraquint.bsky.social · 01/10/2026
Yes every woman has been harassed, many assaulted. But every woman has also experienced invisible loss from moments she avoided harassment. She felt a space becoming unsafe, so she left, while men stayed on. And in leaving, she lost: opportunities, experiences, learning, promotions, even simply fun.
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Chanda Prescod-Weinstein 🌌 @chanda.blacksky.app · 30/09/2026
Cool to see work in the world that builds on and is in conversation with work I did with my former PhD student Dr. Nathan Rutherford (now at @fqxi.org) and @profannawatts.bsky.social! 🔭
arxiv.org
Bayesian Constraints on Bosonic Dark Matter in Neutron Stars within a Covariant Density-Functional Equation-of-State Ensemble
We investigate neutron stars admixed with repulsively self-interacting bosonic dark matter (DM) using current multi-messenger observations. The dark component is modeled as a complex scalar field coup...
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Prof Anna Watts @profannawatts.bsky.social · 30/09/2026
NewAthena papers could be submitted any time between September 1 and 30. Want to guess whether we've got ours submitted yet?
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Prof Anna Watts @profannawatts.bsky.social · 28/09/2026
So we break the silence. We tell our mutual friends. And we mentally propel the sleazy bastards into the nearest star. [And to anyone who thinks women don't have to deal with this crap when they get older lol nope, still going on].
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Prof Anna Watts @profannawatts.bsky.social · 28/09/2026
Why talk about it all? Why not just focus on the good things about the weekend? WelI, I would love to do that, but harassers flourish in silence. They rely on us to be embarrassed, to keep silent, to try to just forget it ever happened, to keep their actions secret.
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Prof Anna Watts @profannawatts.bsky.social · 28/09/2026
It was way more over the line than I had anticipated having to handle, by a mile, but the pre-loaded "You need to stop, this is absolutely not OK." did eventually make its way out. The adrenaline still flared though. I got out of there as fast as I could when I got to London.
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Prof Anna Watts @profannawatts.bsky.social · 28/09/2026
I made the mistake of taking the window seat in a row, so even though we were in a group, I got boxed in and blocked off. And he grabbed the chance to take the discussion off in an explicit and utterly unwelcome direction.🤮
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Prof Anna Watts @profannawatts.bsky.social · 28/09/2026
Alarms were going, but I figured in a group setting, and mostly hanging out with other friends, I could get through the weekend. And that worked! It was lovely. Until the train ride back to London.
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Prof Anna Watts @profannawatts.bsky.social · 28/09/2026
From the get-go, it was more than that. Lots of sexual innuendo, not really directed at me (also in group), but just a general attempt to move discussions to a place where it was easy to make sorties across boundaries. The sort of stuff that would get you booted at work. Not cool.
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Prof Anna Watts @profannawatts.bsky.social · 28/09/2026
So I hoped for the best. But I went with a pre-loaded mental response to stop anything in its tracks in case it got a bit weird. I had anticipated maybe some maudlin reminiscing, that kind of thing.
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Prof Anna Watts @profannawatts.bsky.social · 28/09/2026
For most, things are perfectly normal. We've all grown, matured, boundaries of existing relationships are respected. But. There's often one where it's not. Where you just get an uneasy feeling that your boundaries might not be respected. I have one of those.
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Prof Anna Watts @profannawatts.bsky.social · 28/09/2026
Last weekend I was back in Oxford for a college reunion. A chance to catch up with old friends. But like many in the room (so many that it was a joke in the speech) I have exes who were also there.
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Prof Anna Watts @profannawatts.bsky.social · 28/09/2026
The dark side of college reunions - the sleazy ex. TW - Sexual harassment
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Prof Anna Watts @profannawatts.bsky.social · 27/09/2026
Do not mess with the door.
Poster on the door of a library reading room  that says Allow the door to open *fully* before moving towards it
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Prof Anna Watts @profannawatts.bsky.social · 25/09/2026
Genuinely picked the worst weekend imaginable for a trip. I have so much to do that I couldn't do it even if I pulled a full caffeine powered no sleep weekend-o-work. HOW AM I STILL GETTING INTO THESE DEADLINE CRISES AT MY AGE?
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Prof Anna Watts @profannawatts.bsky.social · 25/09/2026
I'm not an IOP staff member, but I have colleagues there working on the dense matter equation of state, supernova simulations, gravitational waves, binary mergers, dark matter, and fundamental aspects of relativity. So if you fit the profile, give it a go!
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Prof Anna Watts @profannawatts.bsky.social · 25/09/2026
It is designed to launch excellent researchers from underrepresented groups into faculty positions in the Netherlands or abroad. The fellowship is open to researchers in all fields of experimental and theoretical physics.
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Prof Anna Watts @profannawatts.bsky.social · 25/09/2026
The Els Koffemann postdoctoral fellowship, offered by my colleagues at our Institute of Physics, is accepting applications. academicjobsonline.org/ajo/fellowsh...
academicjobsonline.org
University of Amsterdam, Institute of Physics, Diversity and Inclusion Council
Job #AJO32465, Els Koffeman Postdoctoral Fellowship in Physics at the University of Amsterdam, Institute of Physics, Diversity and Inclusion Council, University of Amsterdam, Amsterdam, Noord-Holland...
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Prof Anna Watts @profannawatts.bsky.social · 21/09/2026
Managed to get Rocky from Project Hail Mary into my lecture on the triple alpha reaction. #MissionAccomplished
static.klipy.com
Rocky Project Hail Mary Rocky Phm
Alt: Rocky Project Hail Mary, Rocky dancing
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CosmicRami 🏳️‍🌈🏳️‍⚧️ @rami.spaceaustralia.com · 18/09/2026
I'm finally so excited to share this! My second PhD paper, and what I've spent the last year working on ... We've discovered not one, BUT TWO, profile change events on the closest and brightest millisecond pulsar (MSP) to Earth! www.spaceaustralia.com/feature/disc... Let's jump ito a 🧵👇 🔭📡
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Prof Anna Watts @profannawatts.bsky.social · 15/09/2026
"Activists" Jeez Louise, but this is way, way beyond activism.
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Prof Anna Watts @profannawatts.bsky.social · 15/09/2026
Read @chanda.blacksky.app 's summary of our new paper! I would never in a zillion years have imagined writing a paper with dark energy in the title (although mind you I said that about dark matter too 👀). But great collaborators can haul you in all kinds of fun and unexpected directions!
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Prof Anna Watts @profannawatts.bsky.social · 15/09/2026
I almost made a flippant remark about it being Russians or farmers when the news of sabotage across the Dutch rail network broke. But I didn't think the farmers were crazy enough to put the lives of rail travellers at risk. Now the Farmers Defence Force is hinting that they were involved.
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Prof Anna Watts @profannawatts.bsky.social · 15/09/2026
Cool paper from @rami.spaceaustralia.com and collaborators on one of our favourite millisecond pulsars doing some funky stuff in the radio! (it appears to be boring in a good way in the X-ray, thankfully...) arxiv.org/abs/2609.15263
arxiv.org
Discovery of Two Consecutive Profile Change Events in the Millisecond Pulsar PSR J0437-4715
The closest and brightest millisecond pulsar (MSP), PSR J0437-4715, is a high-priority pulsar for precision timing experiments, including the Parkes Pulsar Timing Array (PPTA) project, where it is use...
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Prof Anna Watts @profannawatts.bsky.social · 14/09/2026
I had forgotten how utterly weird and wonderful the Rocky Horror Picture Show is. Earworm anyone? It's just a jump to the left...
static.klipy.com
Rocky Horror: Let's Do The Time Warp Again!
Alt: Rocky Horror: Let's Do The Time Warp Again! A line of people in suits are timewarping in a ballroom.
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Matt Steinglass @mattsteinglass.bsky.social · 11/09/2026
On 9/11 reports circulated that in Ede Moroccan-Dutch kids celebrated the attacks. They were false. Strong interview with a teacher and community leader who fought polarization for 25 years and is now exhausted.
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Ionica Smeets @ionica.mathstodon.xyz.ap.brid.gy · 11/09/2026
'Het nieuwe bewijs van OpenAI heeft naar schatting 22,5 miljoen dollar aan rekenkracht gekost. Daarvan had je Andrew Wiles zo’n 225 jaar kunnen inhuren. Of, realistischer, dertig wiskundigen van het kaliber Andrew Wiles voor zeven jaar.' [DPG] www.volkskrant.nl/cs-b44c3da4
myprivacy.dpgmedia.nl
DPG Media Privacy Gate
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Anton Pannekoek Institute for Astronomy @api.uva.nl · 10/09/2026
Teaser voor de lezing van @profannawatts.bsky.social volgende week vrijdag. Toegang gratis! Tickets via pretix.eu/API/Lecture9... 🔭
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Anton Pannekoek Institute for Astronomy @api.uva.nl · 09/09/2026
On Friday September 18, @profannawatts.bsky.social will be giving a free public lecture! The title is Six Decades of Neutron Stars. More info & abstract at api.uva.nl/nl/content/e... Where: Science Park 904, Amsterdam Time: 19:00 Tickets: pretix.eu/API/Lecture9...
pretix.eu
Lecture: Six Decades of Neutron Stars
Fri, Sept. 18, 2026
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Prof Anna Watts @profannawatts.bsky.social · 09/09/2026
static.klipy.com
Power Rangers SPD: Jack Landors - Together We Can Do It!
Alt: Power Rangers SPD: Jack Landors - Together We Can Do It!
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Prof Anna Watts @profannawatts.bsky.social · 09/09/2026
Hier dezelfde opstelling... het enige voordeel zit in de kwaliteit van de thee die ik tijdens de pauze kan zetten!
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Prof Anna Watts @profannawatts.bsky.social · 08/09/2026
werkenbij.uva.nl/en/vacancies...
werkenbij.uva.nl
Vacancy — Tenure-track Faculty Position in Observational Exoplanet Science
Do you work in the field of exoplanet science? Are you interested in contributing to a diverse and collaborative research and teaching community?
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Prof Anna Watts @profannawatts.bsky.social · 08/09/2026
werkenbij.uva.nl/en/vacancies...
werkenbij.uva.nl
Vacancy — Tenure-track Faculty Position in Observational Massive Star and Compact Object Binary Science
Do you work in the field of observational massive star and compact object binary science? Are you interested in contributing to a diverse and collaborative research and teaching community?
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Prof Anna Watts @profannawatts.bsky.social · 08/09/2026
Join us! We are advertising not one but TWO new observation-oriented tenure track faculty positions, in the areas of massive stars/compact binaries and exoplanets. Links in thread! [Genuine footage from our staff meetings, seen below]
static.klipy.com
Avengers Assemble with Thor
Alt: Avengers Assemble - camera pans around the Avengers on a New York (?) street. Thor chairs the staff meeting.
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Chanda Prescod-Weinstein 🌌 @chanda.blacksky.app · 04/09/2026
In the latest round of pass the harasser, this Professor slept with students and now is moving into a leadership role at Arizona State University 🧪 #metoo madison.com/news/local/e...
madison.com
Records: UW-Madison professor engaged in sex with students, exploited 'power imbalance'
The records were released in response to a request from the Wisconsin State Journal.
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Dr Shanika Galaudage @astronerdika.bsky.social · 04/09/2026
Celebrating this chonky neutron star by adding it to my "How dense are neutron stars?" notebook. Find out what volume of this neutron star weighs as much as all of humanity on Earth right now! shanikagalaudage.github.io/scicomm-outr... Spoiler: it's tiny!
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Prof Anna Watts @profannawatts.bsky.social · 03/09/2026
"Collision"
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Prof Anna Watts @profannawatts.bsky.social · 03/09/2026
Wonders idly, as I do every teaching commute season, whether Utrecht University are hiring 🚲🚲🚲
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Prof Anna Watts @profannawatts.bsky.social · 03/09/2026
Day 1 of teaching - invest in new train card. Day 2 of teaching - trains are already borked 🙄😭 Day 3 - now planning to leave home at 6am to make sure I'm there in time to teach at 9. Oh yes and next week train strikes.
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Prof Anna Watts @profannawatts.bsky.social · 02/09/2026
[Notes this for revised version]
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Prof Anna Watts @profannawatts.bsky.social · 02/09/2026
And thanks, AS ALWAYS, to our wonderful radio astronomy colleagues (co-authors on the paper) who provided us with the tight priors on mass, inclination and distance that we used for this source. No radio, no radius!
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Prof Anna Watts @profannawatts.bsky.social · 02/09/2026
If you want to run your own Equation of State analysis you can already find mass-radius posterior samples and credible region contours on Zenodo! Full reproduction packages will be made available once the papers have been through review. zenodo.org/records/2216...
zenodo.org
Data and Reproduction package for: "A NICER view of PSR J1614−2230: a massive and compact millisecond pulsar"
Mass-radius posterior samples and contours for the headline result from the analysis of the millisecond pulsar PSR J1614−2230 presented in "A NICER view of PSR J1614−2230: a massive and compact millis...
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Prof Anna Watts @profannawatts.bsky.social · 02/09/2026
And if you want to skip ahead to find out what it all means for our understanding of dense nuclear matter you can! Companion equation of state paper led by Melissa Mendes of TU Darmstadt. arxiv.org/abs/2609.00173
arxiv.org
Equation of state and neutron star properties with new mass-radius constraints from PSR~J1614--2230, PSR~J2124--3358, and 47~Tuc~X7
We study the impact of new mass-radius information from PSR J1614-2230, PSR J2124-3358, and 47 Tuc X7 in a combined equation of state inference based on chiral effective field theory constraints at nu...
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Prof Anna Watts @profannawatts.bsky.social · 02/09/2026
New NICER pulsar radius from the X-PSI team! For the gloriously chunky 1.9 solar mass pulsar PSR J1614-2230. Led by Lucien Mauviard, a finishing PhD student in Seb Guillot's group in Toulouse. #highenergyastro 🔭🧪 arxiv.org/abs/2609.00172
arxiv.org
A NICER view of PSR J1614$-$2230: a massive and compact millisecond pulsar
Using pulse profile modeling, we obtain the mass-radius measurement of a millisecond pulsar (MSP) with data from the Neutron Star Interior Composition ExploreR, XMM-Newton and the Chandra X-ray Observ...
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Prof Anna Watts @profannawatts.bsky.social · 01/09/2026
Would like to thank the cat's laser like focus on the kickboard under the dishwasher for finally alerting his humans to mousey shenanigans in the adjoining cupboard.
static.klipy.com
Black Cat's Intense Stare
Alt: Black Cat's Intense Stare
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Prof Anna Watts @profannawatts.bsky.social · 30/08/2026
🤬
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