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SUMMARY:A new method for age-dating the formation of bars in disc galaxies
  - Camila de Sa Freitas (ESO)
DTSTART:20221109T134000Z
DTEND:20221109T140500Z
UID:TALK192449@talks.cam.ac.uk
CONTACT:Hannah Uebler
DESCRIPTION:The epoch in which galaxies transition from merger-driven to s
 ecular-driven evolution is tightly related to the epoch of disc settling. 
 While the timing of this transition is of fundamental importance to theori
 es of galaxy formation and evolution\, it is still poorly constrained. Onc
 e discs settle\, they are able to form stellar bars\, which cause gas infl
 ow to the central regions of galaxies. This gas inflow builds\, in a short
  time-scale\, rotationally-supported central structures\, called nuclear d
 iscs. Thus\, timing the formation of nuclear discs allows us to time the b
 ar formation epoch and the disc settling. However\, such a task is not tri
 vial\, since the observed light combines overlapping information from both
  the old main disc and the younger structure. In this work\, we present a 
 novel methodology for disentangling the light of the nuclear structure fro
 m the main disc\, deriving isolated star formation histories\, which enabl
 e us to determine the moment of bar formation. We applied this methodology
  to four nearby Milky Way-like galaxies observed with MUSE@VLT\, successfu
 lly estimating the bar formation epoch. This is the first methodology to d
 ate focused on  timing bar formation that can be broadly applied to galaxi
 es with IFS data. We plan to use it for the TIMER-MUSE survey in the futur
 e\, shedding light on the disc-settling epoch for a larger data set.
LOCATION:The Hoyle Lecture Theatre + Zoom 
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