Leo C. Stein is @duetosymmetry on bsky/threads/🐘
@duetosymmetry
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Physics Prof @ U of MS. Black holes, gravitational waves, general relativity & beyond. Formerly @Caltech @MIT @Cornell. Need thin pizza + fruity coffee. He/him
Oxford, MS
Joined February 2009
Try out my interactive page for visualizing the orbits of photons around spinning black holes!
duetosymmetry.com
Interactive tool for visualizing spherical/circular photon orbits in Kerr
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And now you can read all about it in Caltech's press release!
caltech.edu
A collaboration between physicists at Caltech and other institutions has released an expanded and refined catalog of simulations of black hole mergers.
🎉 Happy paper publication day! 🎉 Our third catalog of binary black hole simulations, now published in Classical and Quantum Gravity. And it's open access! Scheel et al. 2025 Class. Quantum Grav. 42 195017 https://t.co/LGP0vMgLQk Also on the @arxiv at
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And now UMiss News wrote about our latest catalog paper!
🎉 Happy paper publication day! 🎉 Our third catalog of binary black hole simulations, now published in Classical and Quantum Gravity. And it's open access! Scheel et al. 2025 Class. Quantum Grav. 42 195017 https://t.co/LGP0vMgLQk Also on the @arxiv at
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🎉 Happy paper publication day! 🎉 Our third catalog of binary black hole simulations, now published in Classical and Quantum Gravity. And it's open access! Scheel et al. 2025 Class. Quantum Grav. 42 195017 https://t.co/LGP0vMgLQk Also on the @arxiv at
arxiv.org
We present a major update to the Simulating eXtreme Spacetimes (SXS) Collaboration's catalog of binary black hole simulations. Using highly efficient spectral methods implemented in the Spectral...
We are excited to release a major update to our catalog of binary black hole simulations, available at https://t.co/LoIQoEUkN0! Such simulations are key to LIGO/Virgo/KAGRA being able to extract science from their gravitational wave detections. 1/14
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🎉 Paper acceptance day! 🎉 It took 8 months and 3 referees, but the paper (linked below) is now accepted to Physical Review Letters! Read the explainer thread below or a summary at
🎉New paper day🎉 A tale of tails! Finally resolved in fully nonlinear 3+1d numerical relativity with @SXSProject simulations. Late-time tails in nonlinear evolutions of merging black holes De Amicis et al. https://t.co/uS15s271iQ What's it all about? 1/15
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Earthquakes on neutron stars?! SXS researchers Louis Burnaz and Elias Most (@Caltech) and Ashley Bransgrove (@Princeton) simulate how these could be detected in signals from very active radio burst transients. Read their results at https://t.co/Ny2ljbdhsC
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Cranking up the temperature! SXS researchers Hai-Yang Wang, Elias Most and Philip Hopkins (@Caltech) show how hot flows around supermassive black hole binaries with strong magnetic fields alter their feeding behavior. Full results at https://t.co/hJtILs4O7D
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I'm sad to report that Rainer (Rai) Weiss passed away yesterday at age 92. Rai developed the design for LIGO, he and Kip got it funded, trained countless researchers, and received the 2017 Nobel Prize. Rai always had time for students and treated us as equals.
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“For every single professional use that scientists used to use Twitter for, Twitter is much worse now than it used to be, and Bluesky is better that Twitter currently is.” (Link in reply because, as we know, X is terrible.)
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Glasgow, I am in you!
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Do I know anybody who knows Harish-Chandra stuff?
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I updated my notes on the magnetostatic multipole expansion at https://t.co/zn0p7Zd4Sy — mainly because Cyril Pitrou found an error (1/2 should have been ℓ/(ℓ+1)), and pointed me to Damour+Iyer (1991). Sorry for having wrong notes up for so long!
duetosymmetry.com
How to do the STF multipole expansion of the magnetic potential and field (it’s been on my TODO list for a while)
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I updated my notes on the magnetostatic multipole expansion at https://t.co/zn0p7Zd4Sy — mainly because Cyril Pitrou found an error (1/2 should have been ℓ/(ℓ+1)), and pointed me to Damour+Iyer (1991). Sorry for having wrong notes up for so long!
duetosymmetry.com
How to do the STF multipole expansion of the magnetic potential and field (it’s been on my TODO list for a while)
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Last night I was feeling like a grad student as I was deriving the coefficients l/(l+1) and (2l-1)/(2l+1) in this formula (from Blanchet+Damour 1986):
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A government cutting funding for science and R&D to save money is like a farmer trying to cut costs by not buying seeds for the next season
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🎉 Paper publication day! 🎉 This one is now published in CQG: https://t.co/Bw5ARdcwoz The arXiv version https://t.co/ehBmVbf3y9 will, of course, remain open access.
arxiv.org
The Simulating eXtreme Spacetimes Collaboration's code SpEC can now routinely simulate binary black hole mergers undergoing $\sim25$ orbits, with the longest simulations undergoing nearly...
Wake up babe, new preprint just dropped Length dependence of waveform mismatch: a caveat on waveform accuracy @KeefeMitman, Stein, et al. https://t.co/ehBmVbf3y9
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Black hole spectroscopy: from theory to experiment.
arxiv.org
The "ringdown" radiation emitted by oscillating black holes has great scientific potential. By carefully predicting the frequencies and amplitudes of black hole quasinormal modes and comparing...
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Nice: my CV just hit 69 publications
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Big news in numerical relativity!! This is one of the things I've been working on for the past *checks notes* six years. Check it out!
We are excited to release a major update to our catalog of binary black hole simulations, available at https://t.co/LoIQoEUkN0! Such simulations are key to LIGO/Virgo/KAGRA being able to extract science from their gravitational wave detections. 1/14
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Bonus: here's an animation I generated showing how the sausage was made. Each frame is one commit from the paper repo.
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Bonus: here's an animation I generated showing how the sausage was made. Each frame is one commit from the paper repo.
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