5 papers
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…
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…
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…
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…