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Kinematical Structure of the Magellanic System
Roeland P. van der Marel, Nitya Kallivayalil, Gurtina Besla
We review our understanding of the kinematics of the LMC and the SMC, and their orbit around the Milky Way. The line-of-sight velocity fields of both the LMC and SMC have been mapp…
The Binarity of the Magellanic Clouds and the Formation of the Magellanic Stream
Gurtina Besla, Nitya Kallivayalil, Lars Hernquist +4
The HST proper motion (PM) measurements of the Clouds have severe implications for their interaction history with the Milky Way (MW) and with each other. The Clouds are likely on t…
New Analysis of the Proper Motions of the Magellanic Clouds using HST/WFPC2
Nitya Kallivayalil, Roeland P. van der Marel, Jay Anderson +2
In HST Cycles 11 and 13 we obtained two epochs of ACS/HRC data for fields in the Magellanic Clouds centered on background quasars. We used these data to determine the proper motion…
The Radical Consequences of Realistic Satellite Orbits for the Heating and Implied Merger Histories of Galactic Disks
Philip F. Hopkins, Lars Hernquist, Thomas J. Cox +2
Previous models of galactic disk heating in interactions invoke restrictive assumptions not necessarily valid in modern LCDM contexts: that satellites and orbits are rigid and circ…
On the Origin of Dynamically Cold Rings Around the Milky Way
Joshua D. Younger, Gurtina Besla, T. J. Cox +3
We present a scenario for the production of dynamically cold rings around the Milky Way via a high-eccentricity, flyby encounter. These initial conditions are more cosmologically m…
Are the Magellanic Clouds on their First Passage about the Milky Way?
Gurtina Besla, Nitya Kallivayalil, Lars Hernquist +4
Recent proper motion measurements of the Large and Small Magellanic Clouds (LMC and SMC, respectively) by Kallivayalil et al (2006a,b) suggest that the 3D velocities of the Clouds…