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Keefe Mitman @KeefeMitman

Theoretical Physicist from Wisconsin šŸ§€ | @NASA Einstein Fellow at @Cornell | PhD @Caltech | BA @Columbia | Love black holes and gravitational waves!

Joined April 2020
  • Tweets 305
  • Following 160
  • Followers 371
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Keefe Mitman@KeefeMitman
24 Jun 2024
It was an honor to present one of Caltech's Everhart Lectures this year, in which I shared some of my thesis work with the broader community. If you want to see it for yourself, it's uploaded here! youtube.com/watch?v=97Fe3voDā€¦

The Universe Never Forgets: Pushing Einsteinā€™s Theory to the Limits ā€“...

Ā©2024 California Institute of Technology

youtube.com
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When you look up at the night sky, you're looking out on a universe that is ever evolving: planets orbit, stars twinkle, and black holes collide. Moreover, thanks to @LIGO, we know that the "spacetime fabric" also evolves as gravitational waves ripple through it! 1/13
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Credit to @SXSProject for this wonderful video!
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But who knows! Maybe if we rerun our analysis on the recently-released GWTC-5.0 we'll see more promise... (stay tuned!) If you want to learn more or if you have any questions, check out the paper on arXiv or feel free to ask me here! arxiv.org/abs/2605.27500 12/13

Constraining Gravitational Wave Memory with Hierarchical Inference

With the multitude of gravitational wave observations that have been made in the past ten years, probing the dynamical and nonlinear nature of strong gravity is becoming more and more feasible....

arxiv.org
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Or even check out these excellent YouTube videos on memory by @PBSSpaceTime and @SciShow! youtube.com/watch?v=CWzfWZplā€¦ youtube.com/watch?v=ow1w2y-sā€¦ 13/13

Can Space Time Remember?

Thank you to Raycon for supporting PBS. Go to https://www.buyraycon...

youtube.com
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Long overdue, but I'm moving to bluer skies! bsky.app/profile/keefemitmanā€¦
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Keefe Mitman retweeted
Dr Chiara Mingarelli@Dr_CMingarelli
Feb 5
New @NANOGrav paper! We targeted 114 AGN to ask if specific galaxies host supermassive black hole binaries ā€” getting ~2x better constraints. Two sources stood out, so we built a detection protocol. We named them Rohan and Gondor. The beacons are lit!šŸ”ļøšŸ”ļøšŸ”„ news.yale.edu/2026/02/05/beaā€¦

ā€˜The beacons were lit!ā€™ A system to detect and map merging black holes

Using gravitational wave measurements, an international team has identified two black hole binary candidates ā€” named, in part, after locales in ā€œThe Lord of the Rings.ā€

news.yale.edu
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And now you can read all about it in Caltech's press release! caltech.edu/about/news/catalā€¦

Catalog of Simulations of Black Hole Collisions Expands

A collaboration between physicists at Caltech and other institutions has released an expanded and refined catalog of simulations of black hole mergers.

caltech.edu
SXS Project@SXSProject
6 Oct 2025
šŸŽ‰ Happy paper publication day! šŸŽ‰ 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 iopscience.iop.org/article/1ā€¦ Also on the @arxiv at arxiv.org/abs/2505.13378
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Keefe Mitman retweeted
SXS Project@SXSProject
6 Oct 2025
šŸŽ‰ Happy paper publication day! šŸŽ‰ 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 iopscience.iop.org/article/1ā€¦ Also on the @arxiv at arxiv.org/abs/2505.13378

The SXS collaborationā€™s third catalog of binary black hole simulations

The SXS collaborationā€™s third catalog of binary black hole simulations, Scheel, Mark A, Boyle, Michael, Mitman, Keefe, Deppe, Nils, Stein, Leo C, Armaza, CristĆ³bal, Bonilla, Marceline S, Buchman,...

iopscience.iop.org
SXS Project@SXSProject
20 May 2025
We are excited to release a major update to our catalog of binary black hole simulations, available at arxiv.org/abs/2505.13378! Such simulations are key to LIGO/Virgo/KAGRA being able to extract science from their gravitational wave detections. 1/14
Figure 1 from our new catalog paper. We accurately capture precession, memory, eccentricity, and high mass ratio systems. For full details, see the paper.

ALT Figure 1 from our new catalog paper. We accurately capture precession, memory, eccentricity, and high mass ratio systems. For full details, see the paper.
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Keefe Mitman retweeted
Physical Review Letters@PhysRevLett
12 Sep 2025
Volume 135, Issue 11 journals.aps.org/prl/issues/ā€¦ Cover: Inspiral, merger, and ringdown for a pair of black holes, which allowed confirmation of Hawkingā€™s area law. Data are from @LIGOWA (red) and @LIGOLA (blue) journals.aps.org/prl/issues/ā€¦
PRL cover with the caption in the tweet. The image shows an artist's rendering of the black hole merger and the corresponding gravitational-wave data.

ALT PRL cover with the caption in the tweet. The image shows an artist's rendering of the black hole merger and the corresponding gravitational-wave data.

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Keefe Mitman retweeted
Diana Cai
@dianarycai
12 Sep 2025
The application for a research fellowship at the Flatiron Institute in the Center for Computational Math is now live! This includes positions for ML and stats. The deadline is Dec 1. Links below with more details.
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