Rixin Li李日新

Software

• PLAN: A Clump-finder for Planetesimal Formation Simulations (links: GitHub, ADS, ASCL).
• DustPy-GPU: A CuPy-Accelerated Fork of DustPy for Simulating Dusty Protoplanetary Disks (links: GitHub, ADS, PyPI, Doc).
• AthenaK-dust: A Work-in-Progress Branch for the Dust Module in AthenaK (links: GitHub).
• Rubble: Simulating Dust Size Distributions in Protoplanetary Disks (links: GitHub, ADS, ASCL).
• Pyridoxine: Handy Python Snippets for Analyzing Athena Data (links: GitHub, PyPI, Anaconda; Demo1, Demo2).

Visualizations

• [Interactive] τ-Z_crit map for the key results from Li & Youdin, 2021, Thresholds for Particle Clumping by the Streaming Instability
• [Video] State-of-the-art 3D simulation of planetesimal formation with hitherto the highest grid resolution and with more than 100 million dust particles from Li, Youdin, & Simon, 2019, Demographics of Planetesimals Formed by the Streaming Instability.
  Some variations of this video are available: (i) particle only, 3D; (ii) particle only, 3D, grayscale, and (iii) particle only, 2D.
• [Playlist] An origin story for the cold classical Kuiper Belt: animations for every simulation in the paper series, Li & Chiang 2025, In-Situ Formation of the Cold Classical Kuiper Belt, and Li & Chiang 2026, The Edges of Planetary Systems: Falling Off the Kuiper Cliff in a Dissipating Gas Disk.
• [Video] An example N-body simulation of a six-planet system initially in a near-resonant chain, where two major merger events take place in the 100 Myr of evolution. Data is from Li, Chiang, Choksi, & Dai, 2025, The Resonant Remains of Broken Chains from Major and Minor Mergers
• [Interactive] A list of exoplanetary systems with transit timing variations (TTV) and well-defined TTV phases from Kepler data (Rowe et al. 2015). See Li, Chiang, Choksi, & Dai, 2025 for definitions of well-defined TTV phases (see also Choksi & Chiang 2023).
• [Video] An example hydrodynamical simulation of embedded, stellar-mass binary black holes interacting with the AGN disk, in a local shearing box with seven levels of static mesh refinement, resolving the binary Hill radius by ~1000 cells -- an unparalleled high resolution. Data is from Li & Lai 2024, Hydrodynamical evolution of black-hole binaries embedded in AGN discs - III. The effects of viscosity
• [Interactive] 3D iso-surface animation of an embedded binary black hole in a global AGN disk simulation.
• [Interactive: Paper I] [Interactive: Paper II] dust accumulation survey results from the paper series Li, Chen, & Lin 2022, Dust Accumulation near the Magnetospheric Truncation of Protoplanetary Discs around T Tauri Stars, and Li, Chen, & Lin 2024, II. The Effects of Opacity and Thermal Evolution