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We present the results of N-body models of the Milky Way and Large Magellanic Cloud system and study the kinematic reflex motion in the stellar halo owing to the barycentre displacement of the disc. In agreement with previous studies, we…

Astrophysics of Galaxies · Physics 2020-02-28 Michael S. Petersen , Jorge Peñarrubia

Studying the trajectories of objects like stars, globular clusters or satellite galaxies in the Milky Way allows to trace the dark matter halo but requires reliable models of its gravitational potential. Realistic, yet simple and fully…

Astrophysics of Galaxies · Physics 2016-08-23 Andreas Irrgang , Benjamin Wilcox , Evan Tucker , Lucas Schiefelbein

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

Understanding the physical mechanism behind the formation of a co-rotating thin plane of satellite galaxies, like the one observed around the Milky Way (MW), has been challenging. The perturbations induced by a massive satellite galaxy,…

The Large Magellanic Cloud (LMC) is the most luminous satellite galaxy of the Milky Way and owing to its companion, the Small Magellanic Cloud (SMC), represents an excellent laboratory to study the interaction of dwarf galaxies. The aim of…

We show that a Magellanic Cloud origin for the warp of the Milky Way can explain most quantitative features of the outer HI layer recently identified by Levine, Blitz & Heiles (2005). We construct a model similar to that of Weinberg (1998)…

Astrophysics · Physics 2009-11-11 Martin D. Weinberg , Leo Blitz

We calculate the probability that a Milky-Way-like halo in the standard cosmological model has the observed number of Magellanic Clouds (MCs). The statistics of the number of MCs in the LCDM model are in good agreement with observations of…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 Michael T. Busha , Risa H. Wechsler , Peter S. Behroozi , Brian F. Gerke , Anatoly A. Klypin , Joel R. Primack

We investigate the non-adiabatic effect of time-dependent deformations in the Milky Way (MW) halo potential on stellar streams. Specifically, we consider the MW's response to the infall of the Large Magellanic Cloud (LMC) and how this…

Astrophysics of Galaxies · Physics 2024-06-25 Richard A. N. Brooks , Jason L. Sanders , Sophia Lilleengen , Michael S. Petersen , Andrew Pontzen

We examine whether the Large Magellanic Cloud (LMC) is currently losing its stellar halo to Milky Way (MW) tides. We present a live $N$-body model for the ongoing MW-LMC interaction that predicts a prominent stream of stars tidally stripped…

Astrophysics of Galaxies · Physics 2022-06-01 Michael S. Petersen , Jorge Peñarrubia , Ella Jones

We use high resolution N-Body/SPH simulations to study the hydro-dynamical and gravitational interaction between the Large Magellanic Cloud and the Milky Way. We model the dark and hot extended halo components as well as the stellar/gaseous…

Astrophysics · Physics 2007-05-23 C. Mastropietro , B. Moore , L. Mayer , J. Stadel , J. Wadsley

The Large and Small Magellanic Clouds (LMC and SMC) are the Milky Way's nearest interacting galaxy pair, offering a unique laboratory for studying tidal effects on galactic disks. Despite extensive survey efforts, the three-dimensional…

I review current efforts to measure the mean density of dark matter near the Sun. This encodes valuable dynamical information about our Galaxy and is also of great importance for 'direct detection' dark matter experiments. I discuss…

Astrophysics of Galaxies · Physics 2014-06-16 J. I. Read

We report the discovery of diffuse stellar substructure in the Milky Way's outer halo toward Bo\"otes, unveiled by deep imaging data of the Subaru/Hyper Suprime-Cam. This substructure is detected as an excess of faint main-sequence stars,…

Astrophysics of Galaxies · Physics 2026-04-14 Yoshihisa Suzuki , Masashi Chiba , Rosemary F. G. Wyse

Perturbations from the Large Magellanic Cloud (LMC) of the Milky Way's stellar and dark matter haloes are well-established. However, studies have generally not considered haloes with high radial anisotropy, like debris from the Gaia…

Astrophysics of Galaxies · Physics 2026-03-13 Adam M. Dillamore , Jason L. Sanders , Richard A. N. Brooks

Simulations of structure formation in the standard cold dark matter cosmological model quantify the dark matter halos of galaxies. Taking into account dynamical friction between the dark matter halos, we investigate the past orbital…

Astrophysics of Galaxies · Physics 2024-03-28 Wolfgang Oehm , Pavel Kroupa

We performed an extended analysis of the parameter space for the interaction of the Magellanic System with the Milky Way (MW). The varied parameters cover the phase space parameters, the masses, the structure, and the orientation of both…

Astrophysics · Physics 2009-11-11 A. Ruzicka , J. Palous , Ch. Theis

The Large Magellanic Cloud (LMC) has a complex dynamics driven by both internal and external processes. The external forces are due to tidal interactions with the Small Magellanic Cloud and the Milky Way, while internally its dynamics…

Astrophysics of Galaxies · Physics 2023-05-19 Nikolay Kacharov , Maria-Rosa L. Cioni

This work presents a new detection of H$_2$ absorption arising in a high velocity cloud (HVC) associated with either the Milky Way or the Large Magellanic Cloud (LMC). The absorber was found in an archival Far Ultraviolet Spectroscopic…

Astrophysics of Galaxies · Physics 2022-06-01 Kirill Tchernyshyov

Observational work have shown that the two brightest satellite galaxies of the Milky Way (MW), the Large Magellanic Cloud (LMC) and the Small Magellanic Cloud (SMC), are rare amongst MW analogues. It is then interesting to know whether the…

Astrophysics of Galaxies · Physics 2019-05-21 Dali Zhang , Yu Luo , Xi Kang

The interaction between the supersonic motion of the Large Magellanic Cloud (LMC) and the Circumgalactic Medium (CGM) is expected to result in a bow shock that leads the LMC's gaseous disk. In this letter, we use hydrodynamic simulations of…

Astrophysics of Galaxies · Physics 2023-11-20 David J. Setton , Gurtina Besla , Ekta Patel , Cameron Hummels , Yong Zheng , Evan Schneider