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SUMMARY:The long-term evolution of turbulent discs in high-redshift galaxi
 es - Joss Bland-Hawthorn (Sydney)
DTSTART:20241031T160000Z
DTEND:20241031T170000Z
UID:TALK223516@talks.cam.ac.uk
CONTACT:107123
DESCRIPTION:Most disc galaxies go through an early epoch of being "gas ric
 h\," an era that is being actively explored today through ALMA and JWST ob
 servations. This high gas-fraction phase got going much sooner (z > 3) tha
 n anticipated by cosmological N-body simulations. A new class of controlle
 d (Nexus) simulations of these early times reveals that these turbulent di
 scs have extraordinary properties. Unexpectedly\, spiral arms\, stellar an
 d gaseous bars\, even bulges\, all form under these conditions. Moreover\,
  baryon sloshing in 3D driven by strong feedback gives rise to thick stell
 ar discs. We argue this is the most likely origin of alpha-enriched thick 
 stellar discs observed today. The sloshing gives rise to specific signatur
 es that may already be observable in ALMA data. We discuss the implication
 s of the new work on galaxy studies.
LOCATION:Hoyle Lecture Theatre\, Institute of Astronomy
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