{ "150689-21909903": { "datetime_modified":"20260821T104852", "datetime_start":"20260928T143000", "datetime_end":"20260928T153000", "has_end_time":1, "date_start":"2026-09-28", "date_end":"2026-09-28", "time_start":"14:30:00", "time_end":"15:30:00", "time_zone":"America\/Detroit", "event_title":"Pause Caf\u00e9: French Conversation Hour", "occurrence_title":"", "combined_title":"Pause Caf\u00e9: French Conversation Hour", "event_subtitle":"", "event_type":"Social \/ Informal Gathering", "event_type_id":"19", "description":"-Enjoy coffee, tea, and snacks while improving your French skills!\n\n-Chat for 10 minutes or the entire hour. All language levels are welcome.\n\nThe RLL Commons is located in the center hallway of the 4th floor of the Modern Languages Building.\n\nFor more information contact Alan Ames at (alanames@umich.edu).", "occurrence_notes":null, "guid":"150689-21909903@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/150689", "building_id":"1000207", "building_name":"Modern Languages Building", "campus_maps_id":"111", "room":"4314 MLB", "location_name":"Modern Languages Building", "has_livestream":0, "cost":"", "tags":["Games","Undergraduate Students","Undergraduate","Talk","Social","Romance Languages And Literatures","Networking","Language","Interactive","In Person","Humanities","Global","French","Free","Food","Discussion","Culture","Community","Coffee"], "website":"", "sponsors":[ { "group_name":"Romance Languages & Literatures RLL", "group_id":"2963", "website":"https:\/\/lsa.umich.edu\/rll" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2026\/08\/event_150689_original-1.jpg", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2026\/08\/event_150689_original-1.jpg", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2026\/08\/event_150689_original-1.jpg", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2026\/08\/event_150689_original-1.jpg", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2026\/08\/event_150689_original-1.jpg", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb\/media\/attachments\/2026\/08\/event_150689_original-1.jpg", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb_square\/media\/attachments\/2026\/08\/event_150689_original-1.jpg", "group_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large\/media\/attachments\/2026\/08\/event_150689_original-1.jpg", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large_lightbox\/media\/attachments\/2026\/08\/event_150689_original-1.jpg", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_large_crop\/media\/attachments\/2026\/08\/event_150689_original-1.jpg", "event_list":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_list\/media\/attachments\/2026\/08\/event_150689_original-1.jpg", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2026\/08\/event_150689_original-1.jpg", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2026\/08\/event_150689_original-1.jpg", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_grid_2x\/media\/attachments\/2026\/08\/event_150689_original-1.jpg", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_feature_large\/media\/attachments\/2026\/08\/event_150689_original-1.jpg", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_feature_thumb\/media\/attachments\/2026\/08\/event_150689_original-1.jpg" }, "occurrence_count":12, "first_occurrence":21909901 } , "150108-21908018": { "datetime_modified":"20260922T064641", "datetime_start":"20260928T150000", "datetime_end":"20260928T160000", "has_end_time":1, "date_start":"2026-09-28", "date_end":"2026-09-28", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"HEP-Astro Seminar | Mapping the Dark Matter in the Milky Way with Stars: The Signal We Already Have", "occurrence_title":"", "combined_title":"HEP-Astro Seminar | Mapping the Dark Matter in the Milky Way with Stars: The Signal We Already Have: Lina Necib (MIT)", "event_subtitle":"Lina Necib (MIT)", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"Dark matter has so far revealed itself in exactly one way: through gravity. In this talk, I will argue that this makes the distribution of dark matter our only positive signal \u2014 and that mapping it precisely may be our most direct route to understanding what dark matter is. Galactic dynamics is no longer data-limited but model-limited, and the assumption most in need of revision, underlying nearly all of our models, is that galaxies are in equilibrium. I will present recent work leveraging Gaia DR3 that reveals a declining stellar rotation curve, show how underestimated errors in Jeans modeling bias these results, and how simulations let us build a more robust treatment that avoids tensions with other probes of the density profile. I will then turn to dwarf galaxies, where the kinematic data will not substantially improve and only better inference can extract the physics: I will present GraphNPE, a graph neural network method that recovers dark matter density profiles from sparse stellar kinematics, revealing a hint of a core in Bo\u00f6tes I, consistent with self-interacting dark matter. Finally, I will turn to the local velocity distribution, where the Milky Way's merger history imprints substructure that the Standard Halo Model does not capture, and use mutual information to show that this history is itself progressively erased from stellar dynamics \u2014 setting a fundamental limit on what the Galaxy can ever tell us. 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