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OSU College of Arts and Sciences Department of Astronomy

Thursday, January 7, 3:30 p.m.
2015 McPherson Laboratory

The Tangled Past of Andromeda and Triangulum

Larry Widrow
Queen's University

According to the tenets of hierarchical structure formation, galaxies grow by accreting smaller systems, a process beautifully captured in the Pan-Andromeda Archeological Survey (PAndAS). I will describe the latest results from PAndAS including newly discovered faint extensions of the stellar disk of M33. Our working hypothesis is that these features were created during a recent tidal interaction between M31 and M33. The hypothesis is explored through a series of N-body simulations. I will discuss our method for generating the initial conditions used in the M31-M33 experiments as well as other projects in the field of galactic dynamics.