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DTSTAMP:20260129T161017
DTSTART;TZID=America/Detroit:20260205T153000
DTEND;TZID=America/Detroit:20260205T162000
SUMMARY:Lecture / Discussion:The Department of Astronomy 2025-2026 Colloquium Series Presents:
DESCRIPTION:\"Investigating the Effects of SMBH Feedback on Galaxy Morphology using FIRE-2 Simulations\"\n\nIn the local universe\, low-mass irregular galaxies (stellar mass ~ 10^9 M_sun) and Milky Way mass disk galaxies (stellar mass ~ 10^10 M_sun) are typically star-forming\, while massive\, elliptical galaxies (stellar mass ~ 10^11 M_sun) are usually “quenched” or not forming stars. Simulations have shown that supermassive black hole (SMBH) feedback shuts down star formation in these massive galaxies and is required to reproduce the observed galaxy population at low redshift. The details of how SMBH Feedback corresponds to galaxy morphology are still not fully understood. To elucidate the effects of SMBH Feedback on galaxy morphology\, we analyze a subset of 9 Milky Way-mass galaxies with live SMBH feedback from the Feedback In Realistic Environments (FIRE) simulations. Using circularity (epsilon = J_z/J_c(E)) as a proxy for morphology\, we investigate how the presence of SMBH feedback energetics\, like heating and outflows/winds\, disrupts star formation and the subsequent morphological evolution of galaxies over cosmic time. We find that SMBH feedback reduces star formation across three evolutionary phases corresponding to spheroidal\, thick disk\, and thin disk morphologies. The effect of SMBH during the disk formation phase results in more spheroidal-shaped galaxies under SMBH Feedback than without.
UID:144801-21895955@events.umich.edu
URL:https://events.umich.edu/event/144801
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:astronomy,astrophysics
LOCATION:West Hall - 411
CONTACT:
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DTSTAMP:20260125T200954
DTSTART;TZID=America/Detroit:20260205T154500
DTEND;TZID=America/Detroit:20260205T170000
SUMMARY:Workshop / Seminar:Algebraic Geometry Learning Seminar: Matroids II
DESCRIPTION:Introduce the operations of deletion and contraction on matroids\, and the notion of minors of a matroid. Then discuss excluded minor theorems\, and in particular Tutte’s criterion in these terms for a regular matroid to be cographic.
UID:144453-21895379@events.umich.edu
URL:https://events.umich.edu/event/144453
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
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