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Debris streams in the solar neighbourhood as relicts from the formation of the Milky Way
Amina Helmi, Simon D. M. White, P. Tim de Zeeuw +1
It is now generally believed that galaxies were built up through gravitational amplification of primordial fluctuations and the subsequent merging of smaller precursor structures.…
Averaging Einstein's Equations: The Linearized Case
William R. Stoeger, Amina Helmi, Diego F. Torres
We introduce a simple and straight-forward averaging procedure, which is a generalization of one which is commonly used in electrodynamics, and show that it possesses all the chara…
Building up the Stellar Halo of the Galaxy
Amina Helmi, Simon D. M. White
We study numerical simulations of satellite galaxy disruption in a potential resembling that of the Milky Way. Our goal is to assess whether a merger origin for the stellar halo wo…