16 papers
The disrupted chemical enrichment history of the Milky Way driven by gas accretion
Jianhui Lian, Qinhao Shao, Min Du +4
As the only galaxy enabling temporally-resolved observations from an internal vantage point, the Milky Way as a galaxy offers unique insights into galactic chemical enrichment hist…
Constraining the population of dark matter halo shapes using hierarchical inference with extragalactic stellar streams
David Chemaly, Elisabeth Sola, Vasily Belokurov +4
Stellar streams, the debris of tidally disrupted satellites, trace their host's gravitational potential and thus probe dark matter halo structure. While six-dimensional phase-space…
Constraints on the population level distribution of nearby Dark Matter halo shapes with extragalactic streams
David Chemaly, Elisabeth Sola, Sergey Koposov +3
Stellar streams trace the gravitational potential of their host galaxies and provide a sensitive probe of dark matter halo structure. Previously, we developed, and tested on simula…
SchwarMAX: a GPU-friendly Schwarzschild orbit-superposition modelling framework
HanYuan Zhang, David Chemaly, Eugene Vasiliev +3
The Schwarzschild orbit-superposition method is a highly flexible dynamical modelling tool. It constrains the mass distribution of a galaxy using line-of-sight velocity and photome…
Self-interacting dark matter promotes bar formation in disk galaxies
Shashank Dattathri, Frank C. van den Bosch, HanYuan Zhang +4
Despite its remarkable success on large scales, the standard CDM paradigm faces persistent small-scale challenges that have motivated alternative models for the dark sector. Se…
Bar-induced migration of Centauri away from Gaia Sausage-Enceladus
Adam M. Dillamore, Hanyuan Zhang, Vasily Belokurov
The globular cluster Cen has been suggested to have originated in the Gaia Sausage-Enceladus (GSE) merger event, possibly as its nuclear star cluster. However, the present-day…