57 citations · 157 across the 13 of their papers we have counts for
6 papers · 1 filter
Characterisation of local halo building blocks: Thamnos and Sequoia
Emma Dodd, Tomás Ruiz-Lara, Amina Helmi +5
A crucial aspect of galaxy evolution is the pace at which galaxies build up their mass. We investigate this hierarchical assembly by uncovering and timing accretion events experien…
Testing MOND using the dynamics of nearby stellar streams
Orlin Koop, Amina Helmi
The stellar halo of the Milky Way is built up, at least in part, from debris from past mergers. Stars from such merger events define substructures in phase-space, for example in th…
Constrained cosmological simulations of the Local Group using Bayesian hierarchical field-level inference
Ewoud Wempe, Guilhem Lavaux, Simon D. M. White +3
We present a novel approach based on Bayesian field-level inference capable of resolving individual galaxies within the Local Group (LG), enabling detailed studies of its structure…
On the Galactic rotation curve inferred from the Jeans equations Assessing its robustness using Gaia DR3 and cosmological simulations
Orlin Koop, Teresa Antoja, Amina Helmi +2
Several works have recently applied Jeans modelling to Gaia-based datasets to infer the circular velocity curve for the Milky Way. Such works have consistently found evidence for a…
Filling in the Blanks: A Method to Infer the Substructure Membership and Dynamics of 5D Stars
Thomas M. Callingham, Amina Helmi
We present and test a method to infer a probability density function (PDF) for the missing vlos of a star with 5D information within kpc. We use stars from the Gaia DR3 RVS c…
Chronology of our Galaxy from Gaia Colour-Magnitude Diagram-fitting (ChronoGal). I. The formation and evolution of the thin disk from the Gaia Catalogue of Nearby Stars
C. Gallart, F. Surot, S. Cassisi +15
The current major challenge to reconstruct the chronology of the Milky Way (MW) is the difficulty to derive precise stellar ages. CMD-fitting offers an alternative to individual ag…