Implications of Recent Measurements of the Milky Way Rotation for the Orbit of the Large Magellanic Cloud
arXiv:0808.0104 · doi:10.1111/j.1745-3933.2008.00573.x
Abstract
We examine the implications of recent measurements of the Milky Way rotation for the trajectory of the Large Magellanic Cloud. The ~ 14+/-6% increase in the MW circular velocity relative to the IAU standard of 220 km/s changes the qualitative nature of the inferred LMC orbit. Instead of the LMC being gravitationally unbound, as has been implied based on a recent measurement of its proper motion, we find that the past orbit of the LMC is naturally confined within the virial boundary of the MW, although still not as tightly bound as in previous estimates.
Accepted for publication in MNRAS, 5 pages, 5 figures
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- Dynamics of the Magellanic Clouds in a LCDM Universe
- Detailed maps of interstellar clouds in front of omega Centauri: Small-scale structures in the Galactic Disc-Halo interface
- Properties and Origin of the High-Velocity Gas Toward the Large Magellanic Cloud
- A Genetic Approach to the History of the Magellanic Clouds
- The Magellanic Stream and Debris Clouds
- Origin of structural and kinematical properties of the Small Magellanic Cloud
- Kinematical Structure of the Magellanic System
- Revisiting the Role of M31 in the Dynamical History of the Magellanic Clouds
- NuSTAR and Swift Observations of the Extragalactic Black Hole X-ray Binaries
- New Analysis of the Proper Motions of the Magellanic Clouds using HST/WFPC2