Selected Recent Work
Euclid Quick Data Release (Q1): The geometry of dark matter halos from extragalactic streams
Euclid Collaboration; N. Starkman, J. Nibauer, S. Pearson, S. Wu, M. Walmsley, L. Necib, et al. — Submitted to A&A
Extending stream-based inference of halo shapes beyond the Milky Way.
Reconstructing Galactic Gravitational Potentials from Stellar Kinematics with Physics-Informed Neural Networks
C. Myers, N. Starkman, L. Necib — Submitted to ApJ
Recovering the Galactic potential without imposing equilibrium by hand.
Galactic Amnesia: The Information Washout of the Milky Way Merger History
L. Necib, D. Folsom, E. Y. Davies, N. Starkman, A. Thoyas — Submitted to ApJ
How much of the Milky Way’s accretion history survives in present-day stellar kinematics — and how much is irretrievably erased.
Set the Night on FIRE: Building an Empirical Local Dark Matter Velocity Distribution
X. Zhang, A. Thoyas, L. Necib, A. Wetzel, A. Arora — arXiv:2603.25783
How the Milky Way’s merger history shapes the local dark matter velocity distribution, and the limits of reconstructing it from stellar kinematics.
Decoding the Galactic Twirl: The Downfall of Milky Way-mass Galaxy Rotation Curves in the FIRE Simulations
X. Ou, L. Necib, A. Wetzel, A. Frebel, J. Bailin, M. Oeur — ApJ 994, 128
The limits of rotation curves as a probe of the dark matter distribution in Milky Way-mass galaxies.
Trial by FIRE: Probing the dark matter density profile of dwarf galaxies with GraphNPE
T. Nguyen, J. I. Read, L. Necib, S. Mishra-Sharma, C.-A. Faucher-Giguère, A. Wetzel — MNRAS 541, 2707
Simulation-based inference of dwarf density profiles, tested against cosmological simulations rather than idealized mocks.
Theoretical Predictions for the Inner Dark Matter Distribution in the Milky Way Informed by Simulations
A. Hussein, L. Necib, M. Kaplinghat, S. Y. Kim, A. Wetzel, J. I. Read, M. P. Rey, O. Agertz — Submitted to PRD
What simulations imply for the dark matter density at the centre of the Galaxy.
Synthetic Gaia DR3 surveys from the FIRE cosmological simulations of Milky-Way-mass galaxies
T. Nguyen, X. Ou, N. Panithanpaisal, N. Shipp, L. Necib, R. Sanderson, A. Wetzel — ApJ 966, 108
Mock Gaia catalogues from cosmological simulations, for testing inference methods against a known ground truth.
The Dark Matter Profile of the Milky Way Inferred from its Circular Velocity Curve
X. Ou, A.-C. Eilers, L. Necib, A. Frebel — MNRAS 528, 693
A measurement of the Galactic dark matter profile from the circular velocity curve.
Evidence for a Vast Prograde Stellar Stream in the Solar Vicinity
L. Necib, B. Ostdiek, M. Lisanti, T. Cohen, M. Freytsis, S. Garrison-Kimmel, P. F. Hopkins, A. Wetzel, R. Sanderson — Nature Astronomy (2020)
The discovery of Nyx, a prograde stellar stream in the solar neighbourhood.
Lina Necib 