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The Large-Scale Structure Of The Halo Of The Andromeda Galaxy. Ii. Hierarchical Structure In The Pan-Andromeda Archaeological Survey, Alan W. Mcconnachie, Rodrigo Ibata, Nicolas Martin, Annette M.N. Ferguson, Michelle Collins, Stephen Gwyn, Mike Irwin, Geraint F. Lewis, A. Dougal Mackey, Tim Davidge, Veronica Arias, Anthony Conn, Patrick Côté, Denija Crnojevic, Avon Huxor, Jorge Penarrubia, Chelsea Spengler, Nial Tanvir, David Valls-Gabaud, Arif Babul, Pauline Barmby, Nicholas F. Bate, Edouard Bernard, Scott Chapman, Aaron Dotter, William Harris, Brendan Mcmonigal, Julio Navarro, Thomas H. Puzia
The Large-Scale Structure Of The Halo Of The Andromeda Galaxy. Ii. Hierarchical Structure In The Pan-Andromeda Archaeological Survey, Alan W. Mcconnachie, Rodrigo Ibata, Nicolas Martin, Annette M.N. Ferguson, Michelle Collins, Stephen Gwyn, Mike Irwin, Geraint F. Lewis, A. Dougal Mackey, Tim Davidge, Veronica Arias, Anthony Conn, Patrick Côté, Denija Crnojevic, Avon Huxor, Jorge Penarrubia, Chelsea Spengler, Nial Tanvir, David Valls-Gabaud, Arif Babul, Pauline Barmby, Nicholas F. Bate, Edouard Bernard, Scott Chapman, Aaron Dotter, William Harris, Brendan Mcmonigal, Julio Navarro, Thomas H. Puzia
Physics and Astronomy Publications
The Pan-Andromeda Archaeological Survey is a survey of >400 square degrees centered on the Andromeda (M31) and Triangulum (M33) galaxies that has provided the most extensive panorama of an L ∗ galaxy group to large projected galactocentric radii. Here, we collate and summarize the current status of our knowledge of the substructures in the stellar halo of M31, and discuss connections between these features. We estimate that the 13 most distinctive substructures were produced by at least 5 different accretion events, all in the last 3 or 4 Gyr. We suggest that a few of the substructures farthest from M31 …