@tigerclu

Astro Grad Student @YaleAstronomy | Formerly at @Caltech | Exoplanet Dynamics | @YaleOpenLabs

tigerchenlu98.github.io
Joined April 2021
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🚨🚨 Paper Day! 🚨🚨 Check out our new paper on the dynamics of the HIP-41378 system, which hosts the coldest known super-puff. Our idea is that the planet is NOT puffy, but rather that the transit depth can be explained via a set of oblique exorings. arxiv.org/abs/2410.00641

The Dynamical History of HIP-41378 f -- Oblique Exorings...

The super-puff HIP-41378 f represents a fascinating puzzle due to its anomalously low density on a far-out orbit in contrast with other known super-puffs. In this work, we explore the hypothesis...

arxiv.org
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check out this sick blog from my wonderfully talented friend Helen!!!
Helen Qu@_helenqu23 Dec 2025
quick update: i started a blog! my first post is live & explains the unstable learning dynamics caused by the "deadly triad" of RL through the lens of basic optimization theory. this was so much fun to learn/write about, hope yall enjoy ✨ helenqu.com/blog/posts/deadl… 🧵
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Tiger Lu retweeted
Helen Qu@_helenqu23 Dec 2025
quick update: i started a blog! my first post is live & explains the unstable learning dynamics caused by the "deadly triad" of RL through the lens of basic optimization theory. this was so much fun to learn/write about, hope yall enjoy ✨ helenqu.com/blog/posts/deadl… 🧵
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Coming out of twitter hibernation to shout out Ben’s new paper!!
Phil Armitage@philip_armitage25 Sep 2025
This is very cool. Ben Cassese, Malena Rice @malena_rice and Tiger Lu release a differentiable (based on JAX) Solar System integration code. arxiv.org/abs/2509.19549

A High-Precision, Differentiable Code for Solar System Ephemerides

We present jorbit, a python/JAX library designed to enable modern data-driven numerical studies of the solar system. Written entirely in JAX, an auto-differentiable and optionally GPU accelerated...

arxiv.org
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Wrapping a great week of discussions at the CCA @FlatironInst workshop on ML in planetary dynamics. Thanks everyone! A few personal takeaways: (1/4)
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!! My professor/collaborator/academic idol is on TV!!
Malena Rice@malena_rice31 Oct 2024
The PBS NOVA episode that I was interviewed for premieres tonight! Check it out and learn all about the solar system's "wandering worlds" that lie in the gaps between and beyond the solar system planets 💫☄️
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We're in @PopSci!! Check out this feature on our recent paper by the amazing @briles_34 What if ‘cotton candy’ planets are actually Ring Pops? popsci.com/science/cotton-ca…

What if 'cotton candy' planets are actually Ring Pops?

Some super-puff exoplanets might be Saturn-like ringed worlds, according to new research.

popsci.com
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As a disclaimer - as HIP-41378 f is a ringed planet masquerading as a puffy planet, this paper is an obliquity paper masquerading as a rings paper. We have not detected rings around the planet! But we do show that it should be detectable with JWST, in principle.
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The idea is migration, which both ensures the system's long-term stability and captures planet f into spin-orbit resonance. Our results are robust over the range of reasonable physical parameters for the planet, and in many cases the planet is excited to very high obliquity.
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Very excited about this awesome paper, on arxiv today! @YaleAstronomy's @konstiplanet investigates energy dissipation in wobbling protoplanetary disks as a potential avenue to produce exoplanet orbits that are well-aligned with their host binary's orbit: arxiv.org/abs/2407.03284
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Charlie was a great model of being both a great scientist and a person who cares deeply about others. I am very honored be the recipient of the award in his name.
Yale Chemistry@YaleChem5 Jun 2024
Congrats @JosieJayworth ’24 PhD, recent graduate and recipient of the Charles A. Schmuttenmaer Prize – awarded to one graduating Chemistry PhD student who excels academically and displays outstanding departmental citizenship. See what Josie’s doing now bit.ly/4e9mEQL
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Paper Day 🥳🥳🥳 Our paper on the dynamical history of the HAT-P-11 system is up on arXiv! We propose a two-step process involving planet-planet scattering (using the hot new integrator TRACE 👀) and ZLK migration. Check it out! 🧵 arxiv.org/pdf/2405.19511
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This is getting out of hand -- now there are two of them! This is the second of a two-part series: check out Qier An's paper where she derives the mutual obliquities between the planetary orbits. arxiv.org/abs/2405.19510
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In my opinion the coolest result from our paper: we account for tidally-driven radius inflation during the ZLK migration process. It turns out for our system, we needed this prescription for a fully consistent result!
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🎉🎉🎉 happy to be a part of the first iteration of this great event!!
Malena Rice@malena_rice31 May 2024
Wonderful day at @FlatironCCA for the inaugural New York Area Exoplanets Meeting! A truly excellent lineup of talks — such a joy to see this conference come to fruition (and so proud of these three group members for their outstanding talks!)
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Congratulations to our Flipped Science Fair winners! (1/2) 💡Best Explanation (Tiger Lu - Probing the Shapes of Planets) ✨Best Visuals (Sofia Jacobson - What Does a Cell Look Like Up Close?) #OpenLabs #Yale #YaleSenate #FlippedScienceFair #ScienceOutreach #ScienceFair
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It's Paper Day! Our new hybrid integrator TRACE is now available in REBOUND, and the paper describing its usage is up on arXiv. It's a strict improvement on MERCURIUS, both in accuracy and speed. Check it out! 🧵 arxiv.org/abs/2405.03800
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A big thank you to my collaborators David Hernandez and Hanno Rein for all of their help over the course of this project. And a special shoutout to @yasmeenasali for coming up with the name of the integrator! Time Reversible Algorithm for Astrophysical Close Encounters.
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In conclusion:
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