iiinova — where your digital self keeps evolving

Olly Long @hyperbolly.bsky.social · 10/12/2025

Two of my papers have been published in Physical Review D! See this visualisation of SXS:BBH:4292 that I made to celebrate! 🎉

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Olly Long @hyperbolly.bsky.social · 16/11/2025

How much information can we gain by pushing numerical relativity to its limit by simulating black hole scattering encounters? My latest paper (below) explores these extreme regions of the black-hole scattering parameter space using simulations generated using the Spectral Einstein Code (SpEC).

arxiv.org

Black-hole scattering with numerical relativity: Self-force extraction and post-Minkowskian validation

The asymptotic nature of unbound binary-black-hole encounters provides a clean method for comparing different approaches for modeling the two-body problem in general relativity. In this work, we use n...

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Reposted by Olly Long

SXS Collaboration @sxs-collaboration.bsky.social · 06/10/2025

🎉 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 iopscience.iop.org/article/10.1... Also on the @arxiv.bsky.social at arxiv.org/abs/2505.13378

arxiv.org

The SXS Collaboration's third catalog of binary black hole simulations

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 Einst...

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Olly Long @hyperbolly.bsky.social · 16/07/2025

What happens when high-velocity black holes hurtle past each other in a close encounter, deflecting through spacetime but never merging? My latest paper (below) presents the first simulations of black hole scattering generated using the Spectral Einstein Code (SpEC). (1/6)

arxiv.org

Highly accurate simulations of asymmetric black-hole scattering and cross validation of effective-one-body models

The study of unbound binary-black-hole encounters provides a gauge-invariant approach to exploring strong-field gravitational interactions in two-body systems, which can subsequently inform waveform m...

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Reposted by Olly Long

Leo C. Stein @duetosymmetry.com · 20/05/2025

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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Olly Long @hyperbolly.bsky.social · 21/05/2025

I’m incredibly proud to be part of this and to have my simulations turn into the first publicly available scattering and dynamical capture waveforms! Below is a plot I made for the Einstein Toolkit Blue Book (arXiv:2503.12263) showing the waveforms SXS:BBH:3999 (scatter) and SXS:BBH:4000 (capture).

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Reposted by Olly Long

SXS Collaboration @sxs-collaboration.bsky.social · 07/05/2025

Happy #BlackHoleWeek! To celebrate, we’re releasing the highest-resolution ray-traced still from one of our simulations to date. This skeet has a low res preview. To zoom into the full 43,200 × 21,600 pixel rendering, head to www.black-holes.org/2025/05/07/B... 🧪⚛️🔭

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Olly Long @hyperbolly.bsky.social · 11/12/2024

When your work Secret Santa gift link to your research

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Olly Long @hyperbolly.bsky.social · 08/12/2024

For more info about my research, publications, or talks, visit my website: oliverlong.info. I’m also always happy to connect or chat!

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Olly Long @hyperbolly.bsky.social · 08/12/2024

(6/7) Outside of physics, I’m an avid climber with over 300 outdoor climbs across four countries (trad, sport, and bouldering). Here are my stats if you’re curious:

ukclimbing.com

UKC Logbook - Stats for ofl_23

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Olly Long @hyperbolly.bsky.social · 08/12/2024

(5/7) I’m part of the effort to get the space-based Laser Interferometer Space Antenna (LISA) off the ground as an active LISA Consortium member. I’m also a former member of the LIGO collaboration. Image courtesy of European Space Agency (ESA).

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Olly Long @hyperbolly.bsky.social · 08/12/2024

(4/7) Through my work on self-force, I became a contributor to the KerrGeodesics package of the Black Hole Perturbation Toolkit (BHPT). I am also a contributor to the Spectral Einstein Code (SpEC) of the SXS collaboration.

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Olly Long @hyperbolly.bsky.social · 08/12/2024

(3/7) In 2022, I started my postdoc at the Max Planck Institute for Gravitational Physics (AEI) in Potsdam, Germany. Here, I extended my work to include black hole scattering with comparable masses using Numerical Relativity as part of the @sxs-collaboration.bsky.social.

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Olly Long @hyperbolly.bsky.social · 08/12/2024

(2/7) I earned my MPhys in Physics from the University of Manchester (2018) and a PhD in Mathematical Sciences from the University of Southampton (2022). My PhD focused on using black hole perturbation theory to model small black holes scattering off supermassive black holes.

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Olly Long @hyperbolly.bsky.social · 08/12/2024

(1/7) As I’m new here I thought I should introduce myself! My name is Olly Long and I am a researcher working on modelling the binary black hole problem in General Relativity.

Artist’s impression of the horizons and curvature of a binary black hole system. Generated using Paraview.

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Olly Long @hyperbolly.bsky.social · 05/12/2024

Sometimes you have to go back to the basics

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Olly Long @hyperbolly.bsky.social · 04/12/2024

Here is a visualisation of one of my Numerical Relativity simulations with @sxs-collaboration.bsky.social’s Spectral Einstein Code (SpEC). The initially unbound system loses enough energy at closest approach to become bound leading to a merger. It’s one of the coolest looking simulations I’ve done!

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