568 citations · 8.7k across the 176 of their papers we have counts for
14 papers · 1 filter
Did the Gaia Enceladus/Sausage merger form the Milky Way's bar?
Alex Merrow, Robert J. J. Grand, Francesca Fragkoudi +1
The Milky Way's last significant merger, the Gaia Enceladus/Sausage (GES), is thought to have taken place between 8-11 Gyr ago. Recent studies in the literature suggest that the ba…
Stellar populations and origin of thick disks in AURIGA simulations
Francesca Pinna, Daniel Walo-Martín, Robert J. J. Grand +5
The origin of thick disks and their evolutionary connection with thin disks are still a matter of debate. We provide new insights into this topic by connecting the stellar populati…
A high fidelity Milky Way simulation with Kraken, Gaia-Enceladus, and Sequoia analogues: clues to their accretion histories
Guacimara García-Bethencourt, Chris B. Brook, Robert J. J. Grand +1
Within a simulated Milky Way-like galaxy, we identify and analyse analogues of the Gaia-Enceladus (GE), Kraken and Sequoia mergers that each matches remarkably well observational r…
Action-based dynamical models of M31-like galaxies
Paula Gherghinescu, Payel Das, Robert J. J. Grand +1
In this work, we present an action-based dynamical equilibrium model to constrain the phase-space distribution of stars in the stellar halo, present-day dark matter distribution, a…
A reproduction of the Milky Way's Faraday rotation measure map in galaxy simulations from global to local scales
Stefan Reissl, Ralf S. Klessen, Eric W. Pellegrini +6
Magnetic fields are of critical importance for our understanding of the origin and long-term evolution of the Milky Way. This is due to their decisive role in the dynamical evoluti…
Kinematics of the Local Group gas and galaxies in the Hestia simulations
Luis Biaus, Sebastián E. Nuza, Cecilia Scannapieco
The Local Group (LG) consists of two giant spiral galaxies, the Milky Way (MW) and Andromeda (M31), and several smaller galaxies. The MW and M31 are approaching each other at a rad…
Maximizing science return by coordinating the survey strategies of Roman with Rubin, and other major facilities
R. A. Street, S. Gough-Kelly, C. Lam +13
[Abridged] The Nancy Grace Roman Space Telescope will be one of several flagship survey facilities operating over the next decade starting 2025. The deep near-IR imaging that…
Spatially resolved mock observations of stellar kinematics: full radiative transfer treatment of simulated galaxies
Daniela Barrientos Acevedo, Arjen van der Wel, Maarten Baes +6
We present a framework to build realistic mock spectroscopic observations for state-of-the-art hydrodynamical simulations, using high spectral resolution stellar population models…
Unraveling the Complexity of Dwarf Galaxy Dynamics: A study of Binary Orbital Motions
Wenting Wang, Ling Zhu, Yipeng Jing +8
We investigate the impact of binary orbital motions on the dynamical modeling of dwarf galaxies with intrinsic line-of-sight velocity dispersions () of 1 to 9 km/s. Using…
Can we really pick and choose? Benchmarking various selections of Gaia Enceladus/Sausage stars in observations with simulations
Andreia Carrillo, Alis J. Deason, Azadeh Fattahi +2
Large spectroscopic surveys plus Gaia astrometry have shown us that the inner stellar halo of the Galaxy is dominated by the debris of Gaia Enceladus/Sausage (GES). With the richne…
Exploring the diversity and similarity of radially anisotropic Milky Way-like stellar haloes: implications for disrupted dwarf galaxy searches
Matthew D. A. Orkney, Chervin F. P. Laporte, Robert J. J. Grand +7
We investigate the properties of mergers comparable to the Gaia-Sausage-Enceladus (GSE) using cosmological hydrodynamical simulations of Milky Way-like galaxies. The merger progeni…
Unravelling the mass spectrum of destroyed dwarf galaxies with the metallicity distribution function
Alis J. Deason, Sergey E. Koposov, Azadeh Fattahi +1
Accreted stellar populations are comprised of the remnants of destroyed galaxies, and often dominate the `stellar haloes' of galaxies such as the Milky Way (MW). This ensemble of e…
The impact of the Large Magellanic Cloud on dark matter direct detection signals
Adam Smith-Orlik, Nima Ronaghi, Nassim Bozorgnia +9
We study the effect of the Large Magellanic Cloud (LMC) on the dark matter (DM) distribution in the Solar neighborhood, utilizing the Auriga magneto-hydrodynamical simulations of M…
The interplay of internal and external processes in the buildup of disk galaxies: thick-disk star formation histories in AURIGA simulations
Francesca Pinna, Daniel Walo-Martín, Robert J. J. Grand
Recent integral-field spectroscopy observations have revealed that thick- and thin-disk star-formation histories are regulated by the interplay of internal and external processes.…