46 citations · 92 across the 10 of their papers we have counts for
12 papers
PIANISTpy: A JAX-based Python package for velocity-anisotropic astrophysical equilibrium models
Barry T. Chiang, Frank C. van den Bosch, Hsi-Yu Schive
The hierarchical assembly of dark matter haloes and galaxies via mergers and anisotropic mass accretion naturally imprints non-trivial velocity anisotropy onto haloes and galaxies,…
How Good Are Frontier Models at Physics? Expert Re-Grading Reveals Broken Evaluations and Near-Saturation of Leading Benchmarks
Ali Ansari, Haoran Sun, Andy Zeyi Liu +48
Low reported scores on leading physics benchmarks, including those featured in the Artificial Analysis Intelligence Index (2026), suggest that frontier language models still strugg…
Scatter, bias, and chaos of satellite orbits in triaxial dark matter haloes
Barry T. Chiang, Frank C. van den Bosch, Michael A. Keim
The pericentric distances of satellite galaxies govern their tidal stripping, quenching, and survival, yet their orbits are almost universally computed in spherical host haloes, wh…
New Cold Dark Matter Crisis Revealed by Multiscale Cluster Lensing
Priyamvada Natarajan, Barry T. Chiang, Isaque Dutra
The properties of substructure in galaxy clusters, exquisitely probed by gravitational lensing, offer a stringent test of dark matter (DM) models. Combining strong- and weak-lensin…
Constraining the Nature of Dark Matter from Tidal Radii of Cluster Galaxy Subhalos
Barry T. Chiang, Isaque Dutra, Priyamvada Natarajan
Gravitational lensing by galaxy clusters provides a powerful probe of the spatial distribution of dark matter and its microphysical properties. Strong and weak lensing constraints…
Statistical Properties of Cold Streams In Massive Star-Forming Halos in TNG50
Isabel Medlock, Daisuke Nagai, Nir Mandelker +4
Cold, dense streams of gas are predicted to penetrate deeply into massive halos (> 10^12 Msun) at cosmic noon (z=4-2), fueling galaxies to sustain high star formation rates. We inv…
Universal numerical convergence criteria for subhalo tidal evolution
Barry T. Chiang, Frank C. van den Bosch, Hsi-Yu Schive
Dark matter subhalos and satellite galaxies in state-of-the-art cosmological simulations still suffer from the ``overmerging'' problem, where inadequate force and/or mass resolutio…
The tidal evolution of anisotropic subhaloes: A new pathway to creating isotropic and cored satellites
Barry T. Chiang, Frank C. van den Bosch, Hsi-Yu Schive
It is common practice, both in dynamical modelling and in idealised numerical simulations, to assume that galaxies and/or dark matter haloes are spherical and have isotropic veloci…
Galactic disc heating by density granulation in fuzzy dark matter simulations
Hsun-Yeong Yang, Barry T. Chiang, Guan-Ming Su +3
Fuzzy dark matter (FDM), an attractive dark matter candidate comprising ultralight bosons (axions) with a particle mass eV, is motivated by the small-scale challe…
Can ultralight dark matter explain the age-velocity dispersion relation of the Milky Way disc: A revised and improved treatment
Barry T. Chiang, Jeremiah P. Ostriker, Hsi-Yu Schive
Ultralight axion-like particles eV, or Fuzzy Dark Matter (FDM), behave comparably to cold dark matter (CDM) on cosmological scales and exhibit a kpc-size de Bro…
Soliton Oscillations and Revised Constraints from Eridanus II of Fuzzy Dark Matter
Barry T. Chiang, Hsi-Yu Schive, Tzihong Chiueh
Fuzzy dark matter (FDM) has been a promising alternative to standard cold dark matter. The model consists of ultralight bosons with mass eV and features a quant…
Faint Dark Matter Annihilation Signals and the Milky Way's Supermassive Black Hole
Barry T. Chiang, Stuart L. Shapiro, Jessie Shelton
A wide range of mechanisms predict present-day s-wave dark matter (DM) annihilation cross-sections that are orders of magnitude below current experimental sensitivity. We explore t…