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The rotation of the disk of the Large Magellanic Cloud (LMC) is derived from the radial velocities of 422 carbon stars. New aspects of this analysis include the propagation of uncertainties in the LMC proper motion with a Monte Carlo, and a…

天体物理学 · 物理学 2014-10-13 David R. Alves , Cailin A. Nelson

We present the first detailed assessment of the large-scale rotation of any galaxy based on full three-dimensional velocity measurements. We do this for the LMC by combining our HST average proper motion (PM) measurements for stars in 22…

宇宙学与河外天体物理 · 物理学 2015-06-16 Roeland P. van der Marel , Nitya Kallivayalil

The rotation curve of the Large Magellanic Cloud, which we have derived from high-resolution HI position-velocity diagrams observed by Kim et al (1998), shows a steep central rise and flat rotation with a gradual rise toward the edge. Using…

天体物理学 · 物理学 2015-06-24 Yoshiaki Sofue

We present proper motion (PM) measurements within the central region of the Large Magellanic Cloud (LMC) using near-infrared data from the VISTA survey of the Magellanic Cloud system (VMC). This work encompasses 18 VMC tiles covering a…

Despite their close proximity, the complex interplay between the two Magellanic Clouds, the Milky Way, and the resulting tidal features, is still poorly understood. Recent studies have shown that the Large Magellanic Cloud (LMC) has a very…

We derive general expressions for the LMC velocity field which we fit to kinematical data for 1041 carbon stars. We demonstrate that all previous studies of LMC kinematics have made unnecessary over-simplifications that have led to…

天体物理学 · 物理学 2008-11-26 Roeland P. van der Marel , David R. Alves , Eduardo Hardy , Nicholas B. Suntzeff

The kinematics of 150 carbon stars observed at moderate dispersion on the periphery of the Small Magellanic Cloud are compared with the motions of neutral hydrogen and early type stars in the Inter-Cloud region. The distribution of radial…

天体物理学 · 物理学 2009-10-31 William Kunkel , Serge Demers , M. J. Irwin

We report results of proper motions of 15 known Large Magellanic Cloud (LMC) old globular clusters (GCs) derived from the Gaia DR2 data sets. When these mean proper motions are gathered with existent radial velocity measurements to compose…

星系天体物理 · 物理学 2019-01-09 Andrés E. Piatti , Emilio J. Alfaro , Tristan Cantat-Gaudin

The radial velocities of the 13 globular clusters in the Large Magellanic Cloud have a dispersion of 28 km s$^{-1}$ relative to the HI rotation curve of the LMC, compared to a dispersion of 30 km s$^{-1}$ with regard to the mean globular…

天体物理学 · 物理学 2009-11-10 Sidney van den Bergh

We use the proper motions (PM) of half a million red giant stars in Large Magellanic Cloud measured by Gaia to construct a 2d kinematic map of mean PM and its dispersion across the galaxy, out to 7 Kpc from its centre. We then explore a…

星系天体物理 · 物理学 2018-09-21 Eugene Vasiliev

We present a combined analysis of the kinematics of the Large Magellanic Cloud through its HI gas, carbon stars, and red supergiant stars. After correcting the line-of-sight velocities for the recent accurate measurement of the LMC's space…

天体物理学 · 物理学 2011-02-11 Knut A. G. Olsen , Philip Massey

We compare the properties of gas flows on both the near and far side of the Large Magellanic Cloud (LMC) disk using Hubble Space Telescope UV absorption-line observations toward an AGN behind (transverse) and a star within (down-the-barrel)…

星系天体物理 · 物理学 2016-01-27 Kat Barger , Nicolas Lehner , J. Chris Howk

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,…

天体物理学 · 物理学 2007-05-23 Roeland P. van der Marel

We consider how the gravity of the Galactic disk and the Large Magellanic Cloud (LMC) modifies the radial motions of hypervelocity stars (HVSs) ejected from the Galactic Center. For typical HVSs ejected towards low (high) Galactic…

太阳与恒星天体物理 · 物理学 2018-09-19 Scott J Kenyon , Benjamin C. Bromley , Warren R. Brown , Margaret J. Geller

We have used the latest HI observations of the Small Magellanic Cloud (SMC), obtained with the Australia Telescope Compact Array and the Parkes telescope, to re-examine the kinematics of this dwarf, irregular galaxy. A large velocity…

天体物理学 · 物理学 2009-11-10 S. Stanimirovic , L. Staveley-Smith , P. Jones

The bar of the Large Magellanic Cloud (LMC) is one of the prominent, but controversial feature regarding its location with respect to the disk of the LMC. In order to study the relative location of the bar with respect to the disk, we…

宇宙学与河外天体物理 · 物理学 2015-05-13 Annapurni Subramaniam , Smitha Subramanian

We investigate the kinematics of neutral gas in the Small Magellanic Cloud (SMC) and test the hypothesis that it is rotating in a disk. To trace the 3D motions of the neutral gas distribution, we identify a sample of young, massive stars…

We analyze the velocity residuals of 551 carbon stars relative to a rotating-disk model of the inner $\sim 70 \rm deg^2$ of the Large Magellanic Cloud (LMC). We find that the great majority of the stars in this sample are best fit as being…

天体物理学 · 物理学 2007-05-23 David S. Graff , Andrew P. Gould , Nicholas Suntzeff , Robert A. Schommer , Eduardo Hardy

We have determined the proper motion (PM) of the Large Magellanic Cloud (LMC) relative to four background quasi-stellar objects, combining data from two previous studies made by our group, and new observations carried out in four epochs not…

天体物理学 · 物理学 2008-11-26 Mario H. Pedreros , Edgardo Costa , Rene A. Mendez

We use N-body simulations of star clusters to investigate the possible dynamical origins of the observed spread in core radius among intermediate-age and old star clusters in the Large Magellanic Cloud (LMC). Two effects are considered, a…

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