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Related papers: Magellanic Stream: A Possible Tool for Studying Da…

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Stellar streams are essential tracers of the gravitational potential of the Milky Way, with key implications to the problem of dark matter (DM) model distributions, either within or beyond phenomenological $\Lambda$CDM halos. For the first…

Astrophysics of Galaxies · Physics 2025-07-23 Santiago Collazo , Martín F. Mestre , Carlos R. Argüelles

We present our spectroscopic program aimed to study some new interesting features recently discovered in the Magellanic Cloud System. These were revealed by the spatial distribution of OB-type candidate stars, selected based on UV, optical…

Astrophysics of Galaxies · Physics 2013-07-23 C. Moni Bidin , D. I. Casetti-Dinescu , R. A. Mendez , T. M. Girard , K. Vieira , V. I. Korchagin , W. F. van Altena

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

Cold stellar streams---produced by tidal disruptions of clusters---are long-lived, coherent dynamical features in the halo of the Milky Way. Due to their different ages and different positions in phase space, different streams tell us…

Astrophysics of Galaxies · Physics 2018-11-14 Ana Bonaca , David W. Hogg

Recently obtained kinematic data has shown that the Large Magellanic Cloud (LMC) possesses an old stellar halo. In order to further characterize the properties of this halo, parametric King models are fit to the surface density of RR Lyrae…

Astrophysics · Physics 2009-11-10 David R. Alves

The Magellanic Stream might have grown out of tidal interactions at high redshift, when the young galaxies were close together, rather than from later interactions among the Magellanic Clouds and Milky Way. This is illustrated in solutions…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 P. J. E. Peebles , R. Brent Tully

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 studied the impact of the revisited values for the LSR circular velocity of the Milky Way (Reid et al. 2004) on the formation of the Magellanic Stream. The LSR circular velocity was varied within its observational uncertainties as a free…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 Adam Ruzicka , Christian Theis , Jan Palous

The Leading Arm is a tidal feature that is in front of the Magellanic Clouds on their orbit through the Galaxy's halo. Many physical properties of the Leading Arm, such as its mass and size, are poorly constrained because it has few…

Astrophysics of Galaxies · Physics 2020-04-22 Jacqueline Antwi-Danso , Kathleen A. Barger , L. Matthew Haffner

The Magellanic Stream (MS) is a well-resolved gaseous tail originating from the Magellanic Clouds. Studies of its physical properties and chemical composition are needed to understand its role in Galactic evolution. We investigate the…

Astrophysics of Galaxies · Physics 2015-06-23 Nimisha Kumari , Andrew J. Fox , Jason Tumlinson , Christopher Thom , Tobias Westmeier , Justin Ely

We study the prospects for the current microlensing searches, which have recently discovered several candidates, to yield useful information about the flattening of the Galaxy dark matter halo. Models of HI warps and N-body simulations of…

Astrophysics · Physics 2009-10-22 Joshua A. Frieman , Román Scoccimarro

Tidal streams of globular clusters are ideal tracers of the Galactic gravitational potential. Compared to the few known, complex and diffuse dwarf-galaxy streams, they are kinematically cold, have thin morphologies and are abundant in the…

Astrophysics of Galaxies · Physics 2016-09-07 A. H. W. Küpper , E. Balbinot , A. Bonaca , K. V. Johnston , D. W. Hogg , P. Kroupa , B. X. Santiago

Low surface brightness galaxies are an excellent laboratory where stars and baryonic matter act as tracers of the gravitational potential of the dark matter halo. If dark matter is modeled as a perfect fluid, then spherically symmetric and…

Astrophysics of Galaxies · Physics 2024-08-29 Andrés Aceña , Juan Barranco , Argelia Bernal , Ericson López , Mario Llerena

We propose a new model for the dark matter halo of the Milky Way that fits the properties of the stellar stream associated with the Sagittarius dwarf galaxy. Our dark halo is oblate with q_z = 0.9 for r < 10 kpc, and can be made to follow…

Astrophysics of Galaxies · Physics 2015-06-15 Carlos Vera-Ciro , Amina Helmi

This paper presents an example where the morphology of a single stellar stream can be used to rule out a specific galactic potential form without the need for velocity information. We investigate the globular cluster Palomar5 (Pal 5), which…

Astrophysics of Galaxies · Physics 2016-04-01 Sarah Pearson , Andreas H. W. Küpper , Kathryn V. Johnston , Adrian M. Price-Whelan

We utilize the DESI Legacy Imaging Surveys DR10 to investigate the previously undetected faint extension of the Palomar 5 stellar stream. By applying the HDBSCAN clustering algorithm, we identify stream members and successfully extend the…

Astrophysics of Galaxies · Physics 2025-04-15 Yun-Ao Xiao , Hu Zou , Lu Feng , Wei-Jian Guo , Niu Li , Wen-Xiong Li , Shu-Fei Liu , Gaurav Singh , Ji-Peng Sui , Jia-Li Wang , Sui-Jian Xue

We show that HI clouds in the Magellanic Clouds are stripped by the ram-pressure due to the halo and disk gases of the Galaxy. Molecular clouds are swept to the edge of the LMC, showing an eccentric distribution. The stripped HI clouds form…

Astrophysics · Physics 2007-05-23 Yoshiaki SOFUE

We present a mass model for the Milky Way, which is fit to observations of the Sagittarius stream together with constraints derived from a wide range of photometric and kinematic data. The model comprises a S\'{e}rsic bulge, an exponential…

Astrophysics of Galaxies · Physics 2015-06-11 N. Deg , Lawrence Widrow

The Magellanic Stream and Leading Arm of HI that stretches from the Large and Small Magellanic Clouds (LMC and SMC) and over 200 degrees of the Southern sky is thought to be formed from multiple encounters between the LMC and SMC. In this…

Astrophysics of Galaxies · Physics 2018-05-02 Stephen A. Pardy , Elena D'Onghia , Andrew J. Fox

Resolved rotation curves (RCs) are our best probe of the dark matter distribution around individual galaxies. However their acquisition is resource-intensive, rendering them impractical for large-scale surveys and studies at higher…

Astrophysics of Galaxies · Physics 2024-09-02 Tariq Yasin , Harry Desmond