BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//ZContent.net//ZapCalLib 1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20240314T103000
DTEND;TZID=Atlantic/Canary:20240314T113000
UID:iactalks-1752
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/1752
CREATED:2024-03-14T10:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Galaxy stellar populations illuminating dark matter halo evolution
DESCRIPTION:Galaxy stellar populations illuminating dark matter halo evolut
 ion\nLaura Scholz\n\nThe coupling between the baryonic cycle of galaxies a
 nd dark matter halo assembly is central to our understanding of galaxies, 
 and yet, it remains a challenge for theoretical models and elusive to obse
 rvations. In this talk, I report observational evidence demonstrating that
  different baryonic properties of nearby galaxies are controlled by their 
 host halos. We map galaxy ages, metallicities and star formation histories
  across the stellar-to-halo mass relation for SDSS central galaxies using 
 absorption optical spectra. In addition to stellar populations, we also in
 vestigate the stellar angular momentum, star formation rates and galaxy mo
 rphology across the stellar-to-total dynamical mass relation for CALIFA ga
 laxies. We find that the scatter of both relations correlates with these g
 alaxy properties, which are determined by the combined role of stellar and
  halo/total mass. Galaxies become older, more metal-rich and less rotation
 ally supported, form the bulk of their stars earlier on and faster, have l
 ower star formation rates and earlier-type morphologies as their stellar m
 ass increases (at fixed halo/total mass). Furthermore, we also observe tha
 t the scatter of the star-forming main sequence is driven by galaxies that
  have experienced different evolutionary histories. We interpret our resul
 ts as being driven by halo evolution, with galaxies/halos at different evo
 lutionary stages modulating the variety of galaxy properties observed at f
 ixed stellar mass. Our findings call for a revision of the sub-grid physic
 s implementation in cosmological numerical simulations, in particular duri
 ng the early stages of galaxy formation, and warn observational studies to
  account for the profound effect that halo formation time may have on meas
 ured galaxy properties.\n \nZoom Link: https://rediris.zoom.us/j
 /96210828127?pwd=Z25JdFg1bnpRTVBSQUdpTVlwUDgyQT09
END:VEVENT
END:VCALENDAR