{ "145485-21897400": { "datetime_modified":"20260222T184028", "datetime_start":"20260226T160000", "datetime_end":"20260226T173000", "has_end_time":1, "date_start":"2026-02-26", "date_end":"2026-02-26", "time_start":"16:00:00", "time_end":"17:30:00", "time_zone":"America\/Detroit", "event_title":"RTG NT: Meromorphic cocycle of weight 2", "occurrence_title":"", "combined_title":"RTG NT: Meromorphic cocycle of weight 2: Beomseok Kwon", "event_subtitle":"Beomseok Kwon", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"1.4-1.5 of Darmon-Vonk", "occurrence_notes":null, "guid":"145485-21897400@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/145485", "building_id":"1000166", "building_name":"East Hall", "campus_maps_id":"53", "room":"1060", "location_name":"East Hall", "has_livestream":0, "cost":"", "tags":["Number Theory"], "website":"", "sponsors":[ { "group_name":"RTG Seminar on Number Theory - Department of Mathematics", "group_id":"4901", "website":"" }, { "group_name":"Department of Mathematics", "group_id":"3791", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21897400 } , "144973-21896218": { "datetime_modified":"20260216T114101", "datetime_start":"20260226T160000", "datetime_end":"20260226T170000", "has_end_time":1, "date_start":"2026-02-26", "date_end":"2026-02-26", "time_start":"16:00:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"The Department of Astronomy 2025-2026 Colloquium Series Presents:", "occurrence_title":"", "combined_title":"The Department of Astronomy 2025-2026 Colloquium Series Presents:: Dr. Juliette Becker, Assistant Professor, University of Wisconsin-Madison", "event_subtitle":"Dr. Juliette Becker, Assistant Professor, University of Wisconsin-Madison", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"\"Companions as Clues: Understanding Hot Jupiter Formation\"\n\nHot Jupiters were long thought to be lonely planets. This correctly describes the majority of the population and strongly motivates high-eccentricity tidal migration as the most common method of taking a hot Jupiter to its final short-period orbit. However, a growing number of systems now reveal nearby planetary companions. In this talk, I will discuss recent theoretical and observational results exploring the origin and evolution of hot Jupiters, with a particular focus on those with adjacent companion planets. I show that high-eccentricity tidal migration is generally incompatible with the survival of close-in companions except in very particular scenarios. I further demonstrate that while inner companions are dynamically robust, outer companions can be driven out of the transiting plane through secular interactions, stellar evolution, and stellar obliquity, potentially explaining their apparent absence in some systems. With this in mind, I present the discovery and characterization of the TOI-4468 system as a case study, highlighting how its unique architecture (an outer companion planet, but no inner companion) constrains its dynamical history. The full observational evidence suggests that while most isolated hot Jupiters likely formed through tidal migration, systems with nearby companions preferentially assembled in dynamically cold, disk-mediated ways, revealing multiple formation pathways for close-in giant planets.", "occurrence_notes":null, "guid":"144973-21896218@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/144973", "building_id":"1000165", "building_name":"Weiser Hall", "campus_maps_id":"47", "room":"182", "location_name":"Weiser Hall", "has_livestream":0, "cost":"", "tags":["astronomy","astrophysics"], "website":"https:\/\/lsa.umich.edu\/astro", "sponsors":[ { "group_name":"Department of Astronomy", "group_id":"1178", "website":"" }, { "group_name":"Department of Physics", "group_id":"1965", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2026\/02\/event_144973_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2026\/02\/event_144973_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2026\/02\/event_144973_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2026\/02\/event_144973_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2026\/02\/event_144973_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2026\/02\/event_144973_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2026\/02\/event_144973_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2026\/02\/event_144973_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2026\/02\/event_144973_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2026\/02\/event_144973_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2026\/02\/event_144973_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2026\/02\/event_144973_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2026\/02\/event_144973_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2026\/02\/event_144973_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2026\/02\/event_144973_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2026\/02\/event_144973_original-1.png" }, "occurrence_count":1, "first_occurrence":21896218 } }