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Motivated by recent studies suggesting that the Large Magellanic Cloud (LMC) could be significantly more massive than previously thought, we explore whether the approximation of an inertial Galactocentric reference frame is still valid in…

Astrophysics of Galaxies · Physics 2016-08-08 Facundo A. Gómez , Gurtina Besla , Daniel D. Carpintero , Álvaro Villalobos , Brian W. O'Shea , Eric F. Bell

Using N-body simulations of the Large Magellanic Cloud (LMC's) passage through the Milky Way (MW), tailored to reproduce observed kinematic properties of both galaxies, we show that the high-speed tail of the Solar Neighborhood dark matter…

Astrophysics of Galaxies · Physics 2019-11-20 Gurtina Besla , Annika Peter , Nicolas Garavito-Camargo

The gravitational interactions between the LMC and the Milky Way cause dynamical perturbations in the MW halo, leading to biased distributions of stellar density and kinematics. We run 50 high-resolution N-body simulations exploring varying…

Astrophysics of Galaxies · Physics 2024-10-01 Yanjun Sheng , Yuan-Sen Ting , Xiang-Xiang Xue , Jiang Chang , Hao Tian

The Large and Small Magellanic Clouds (LMC and SMC, respectively) are the largest satellite galaxies of the Milky Way (MW) and their interactions with each other have given rise to multiple stellar substructures in their periphery as well…

Astrophysics of Galaxies · Physics 2026-02-06 Bethany Garver , David Nidever , Victor Debattista , Nathan Deg

Gravitational interactions between the Large Magellanic Cloud (LMC) and the stellar and dark matter halo of the Milky Way are expected to give rise to disequilibrium phenomena in the outer Milky Way. A local wake is predicted to trail the…

We examine Milky Way-Magellanic Cloud systems selected from the Millennium-II Simulation in order to place the orbits of the Magellanic Clouds in a cosmological context. Our analysis shows that satellites massive enough to be LMC analogs…

Astrophysics of Galaxies · Physics 2011-06-09 Michael Boylan-Kolchin , Gurtina Besla , Lars Hernquist

We estimate the mass of the Large Magellanic Cloud (LMC) using the kinematics of 30 LMC globular clusters (GCs). We combine proper motions (PMs) measured with HST, Gaia, or a combination of the two, from a recent study by Bennet et al.…

Astrophysics of Galaxies · Physics 2024-01-29 Laura L. Watkins , Roeland P. van der Marel , Paul Bennet

We present N-body and hydrodynamical simulations of the response of the Milky Way's baryonic disc to the presence of the Large Magellanic Cloud during a first infall scenario. For a fiducial galactic model reproducing the gross properties…

We use cosmological simulations from the Aquarius Project to study the orbital history of the Large Magellanic Cloud (LMC) and its potential association with other satellites of the Milky Way (MW). We search for dynamical analogs to the LMC…

Astrophysics of Galaxies · Physics 2015-05-28 Laura V. Sales , Julio F. Navarro , Andrew P. Cooper , Simon D. M. White , Carlos S. Frenk , Amina Helmi

Magnetic fields significantly influence the structure of galaxies' interstellar media, but our understanding of magnetic field strengths and structures in external galaxies is severely limited. The Large Magellanic Cloud (LMC) offers a…

Astrophysics of Galaxies · Physics 2025-05-30 Hilay Shah , Mark Krumholz , Naomi McClure-Griffiths

Our goal is to study the gravitational effects caused by the passage of the Large Magellanic Cloud (LMC) in its orbit on the stellar halo of the Milky Way (MW). We employed the Gaia Data Release 3 to construct a halo tracers data set…

Astrophysics of Galaxies · Physics 2024-08-21 K. J. Fushimi , M. E. Mosquera , M. Dominguez

We measure the kinematic signature arising from the Milky Way (MW) disc moving with respect to the outer stellar halo, which is observed as a dipole signal in the kinematics of stellar halo tracers. We quantify how the reflex motion varies…

Astrophysics of Galaxies · Physics 2024-02-21 Rashid Yaaqib , Michael S. Petersen , Jorge Peñarrubia

We establish the connection between the Magellanic Clouds (MCs) and the dwarf galaxy candidates discovered in the Dark Energy Survey (DES) by building a dynamical model of the MC satellite populations, based on an extensive suite of…

Astrophysics of Galaxies · Physics 2016-06-15 Prashin Jethwa , Denis Erkal , Vasily Belokurov

Stars slingshotted by the supermassive black hole at the Galactic centre will escape the Milky Way so quickly that their trajectories will be almost straight lines. Previous works have shown how these `hypervelocity stars' are subsequently…

Astrophysics of Galaxies · Physics 2020-04-03 Douglas Boubert , Denis Erkal , Alessia Gualandris

We study the local dark matter distribution in two models for the Milky Way (MW)-Large Magellanic Cloud (LMC) interaction. The effect of the LMC on the local dark matter distribution is dependent on the evolution of the MW-LMC system, such…

Astrophysics of Galaxies · Physics 2022-04-06 Katelin Donaldson , Michael S. Petersen , Jorge Peñarrubia

The first infall of the LMC into the Milky Way (MW) represents a large and recent disruption to the MW circumgalactic medium (CGM). In this work, we use idealized, hydrodynamical simulations of a MW-like CGM embedded in a live dark matter…

The Milky Way (MW) offers a uniquely detailed view of galactic structure and is often regarded as a prototypical spiral galaxy. But recent observations indicate that the MW is atypical: it has an undersized supermassive black hole at its…

Astrophysics of Galaxies · Physics 2019-01-18 Marius Cautun , Alis J. Deason , Carlos S. Frenk , Stuart McAlpine

The Large and Small Magellanic Cloud (LMC and SMC) form the closest interacting galactic system to the Milky Way, therewith providing a laboratory to test cosmological models in the local Universe. We quantify the likelihood for the…

Astrophysics of Galaxies · Physics 2024-10-02 Moritz Haslbauer , Indranil Banik , Pavel Kroupa , Hongsheng Zhao , Elena Asencio

Multi-scale interaction between the LMC, Galactic halo, and the disk is examined with N-body simulations, and precise amplitudes of the Galactic warp excitation are obtained. The Galactic models are constructed most realistically to satisfy…

Astrophysics · Physics 2015-06-24 Toshio Tsuchiya