Implications of Recent Measurements of the Milky Way Rotation for the Orbit of the Large Magellanic Cloud

Details Implications of Recent Measurements of the Milky Way Rotation for the Orbit of the Large Magellanic Cloud Implications of Recent Measurements of the Milky Way Rotation for the Orbit of the Large Magellanic Cloud

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21344401s&link_type=abstract

American Astronomical Society, AAS Meeting #213, #444.01; Bulletin of the American Astronomical Society, Vol. 41, p.326

Astronomy and Astrophysics

Astronomy

Scientific paper

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.

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