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The stellar halo of the Milky Way records the history of its interactions with dwarf galaxies, whose subsequent destruction results in the formation of an extended stellar component. Recent works have suggested that galaxies with masses…

Astrophysics of Galaxies · Physics 2023-05-10 Sownak Bose , Alis J. Deason

The dominant gaseous structure in the Galactic halo is the Magellanic Stream, an extended network of neutral and ionized filaments surrounding the Large and Small Magellanic Clouds (LMC/SMC), the two most massive satellite galaxies of the…

Astrophysics of Galaxies · Physics 2020-09-10 Scott Lucchini , Elena D'Onghia , Andrew J Fox , Chad Bustard , Joss Bland-Hawthorn , Ellen Zweibel

Using the USNO CCD Astrograph all-sky Catalog (UCAC2), we measure the mean proper motion of the two Magellanic Clouds. Appropriately selected LMC populations show a proper motion (<\mu RA>, <\mu DEC>) ~ (+0.84,+4.32) that is significantly…

Astrophysics · Physics 2009-11-11 Y. Momany , S. Zaggia

We present a measurement of the systemic proper motion of the Small Magellanic Cloud (SMC) made using the Advanced Camera for Surveys (ACS) on the \textit{Hubble Space Telescope} (\textit{HST}). We tracked the SMC's motion relative to 4…

Astrophysics · Physics 2008-11-26 Nitya Kallivayalil , Roeland P. van der Marel , Charles Alcock

I summarize Far Ultraviolet Spectroscopic Explorer (FUSE) observations of interstellar O VI absorption towards 12 early-type stars in the Large Magellanic Cloud (LMC), the closest disk galaxy to the Milky Way. LMC O VI is seen towards all…

Astrophysics · Physics 2007-05-23 J. Christopher Howk

The gravitational microlensing experiments in the direction of Large Magellanic Cloud (LMC) predict a large amount of white dwarfs ($\sim 20%$) filling the galactic halo. However, the predicted white dwarfs have not been observed at the…

Astrophysics · Physics 2009-11-10 Sohrab Rahvar

We use the APOSTLE $\Lambda$CDM cosmological hydrodynamical simulations of the Local Group to study the recent accretion of massive satellites into the halo of Milky Way (MW)-sized galaxies. These systems are selected to be close analogues…

Astrophysics of Galaxies · Physics 2021-04-21 Isabel M. E. Santos-Santos , Azadeh Fattahi , Laura V. Sales , Julio F. Navarro

Recent discoveries have shown that a population of hypervelocity stars (HVSs) originate from the Large Magellanic Cloud (LMC). We use three such HVSs as dynamical tracers to constrain the past orbit of the LMC. Since each star was ejected…

Astrophysics of Galaxies · Physics 2026-04-07 Scott Lucchini , Jiwon Jesse Han

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

Dark Matter (DM) subhalos are predicted to perturb stellar streams; stream morphologies and dynamics can constrain the mass distribution of subhalos. Using FIRE-2 simulations of Milky Way-mass galaxies, we show that presence of a Large…

We study the dark matter (DM) annihilation signals from the Large Magellanic Cloud (LMC) and the impact of the LMC on the DM annihilation signals from the Milky Way (MW) halo, using a MW-LMC analogue from the Auriga magneto-hydrodynamical…

High Energy Astrophysical Phenomena · Physics 2025-09-18 Evan Vienneau , Evan Batteas , Addy J. Evans , Odelia V. Hartl , Nassim Bozorgnia , Louis E. Strigari

The highly-substructured outskirts of the Magellanic Clouds provide ideal locations for studying the complex interaction history between both Clouds and the Milky Way (MW). In this paper, we investigate the origin of a >20$^\circ$ long…

Astrophysics of Galaxies · Physics 2021-12-15 L. R. Cullinane , A. D. Mackey , G. S. Da Costa , D. Erkal , S. E. Koposov , V. Belokurov

I review our understanding of the structure and kinematics of the Large Magellanic Cloud (LMC), with a particular focus on recent results. This is an important topic, given the status of the LMC as a benchmark for studies of microlensing,…

Astrophysics · Physics 2007-05-23 Roeland P. van der Marel

The motivation for this paper is to review the limits set on the MACHO content of the Galactic halo by microlensing experiments in the direction of the Large Magellanic Cloud. This has been prompted by recent measurements of the Galactic…

Astrophysics of Galaxies · Physics 2015-03-09 M. R. S. Hawkins

Warps are vertical distortions of the stellar or gaseous disks of galaxies. One of the proposed scenarios for the formation of warps involves tidal interactions among galaxies. A recent study identified a stellar warp in the outer regions…

Astrophysics of Galaxies · Physics 2022-10-12 S. Saroon , S. Subramanian

(Abridged) This paper presents the first connections made between two local features in velocity-space found in a survey of M giant stars and stellar spatial inhomogeneities on global scales. Comparison to cosmological, chemodynamical…

Astrophysics of Galaxies · Physics 2015-06-04 Kathryn V. Johnston , Allyson A. Sheffield , Steven R. Majewski , Sanjib Sharma

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…

We report the discovery of a substantial stellar overdensity in the periphery of the Large Magellanic Cloud (LMC), found using public imaging from the first year of the Dark Energy Survey. The structure appears to emanate from the edge of…

Astrophysics of Galaxies · Physics 2016-04-27 Dougal Mackey , Sergey E. Koposov , Denis Erkal , Vasily Belokurov , Gary S. Da Costa , Facundo A. Gómez

(Abridged) Axisymmetric models of the Milky Way exhibit strong interrelations between the Galactic constants (R_0 and T_0), the stellar columndensity (S_*) and the shape of the dark matter (DM) halo. Here we present analytical relations…

Astrophysics · Physics 2009-11-06 R. P. Olling , M. R. Merrifield

We present a measurement of the systemic proper motion of the Large Magellanic Cloud (LMC) from astrometry with the High Resolution Camera (HRC) of the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope (HST). We observed LMC…

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