{"paper":{"title":"The large-scale structure of the halo of the Andromeda galaxy II. Hierarchical structure in the Pan-Andromeda Archaeological Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aaron Dotter, A. Dougal Mackey, Alan W. McConnachie, Annette M. N. Ferguson, Anthony Conn, Arif Babul, Avon Huxor, Brendan McMonigal, Chelsea Spengler, David Valls-Gabaud, Denija Crnojevic, Edouard Bernard, Geraint F. Lewis, Guillaume Thomas, Jorge Penarrubia, Julio Navarro, Lawrence M. Widrow, Michelle Collins, Mike Irwin, Nial Tanvir, Nicholas F. Bate, Nicolas Martin, Patrick Cote, Pauline Barmby, R. Michael Rich, Rodrigo Ibata, Scott Chapman, Stephen Gwyn, Thomas H. Puzia, Tim Davidge, Veronica Arias, William Harris","submitted_at":"2018-10-18T18:47:35Z","abstract_excerpt":"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 a $L_\\star$ galaxy group to large projected galactocentric radii. Here, we collate and summarise 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 Gyrs. We suggest that a few of the substructures"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.08234","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}