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SUMMARY:The evolutionary pathways of dust and cold gas in quiescent galaxi
 es
DTSTART;VALUE=DATE-TIME:20240229T081500Z
DTEND;VALUE=DATE-TIME:20240229T091500Z
DTSTAMP;VALUE=DATE-TIME:20260516T020538Z
UID:indico-contribution-1436@events.ncbj.gov.pl
DESCRIPTION:Speakers: Giuliano  Lorenzon ()\nThe evolution of galaxies is 
 intrinsically tied to stars\, but also gas\, metals\, and dust within the 
 interstellar medium (ISM). These components are thought to be exclusively 
 linked to the process of star-formation\, implying that the molecular gas 
 and dust should tightly follow each other’s fate. However\, the recent a
 dvent of the most powerful ground-based and space-based instruments such a
 s the Atacama Large Millimeter/submillimeter Array (ALMA) and the James We
 bb Space Telescope (JWST)\, is providing strong evidence that even galaxie
 s that stopped forming new stars millions\, or even billions\, of years ag
 o (called quiescent galaxies or QGs)\, contain significant amounts of dust
  with respect to their stellar mass.\n\nTo overcome the observational chal
 lenges (mostly due to the significant observing time required to measure d
 ust in QGs)\, we studied these objects in the state-of-the-art cosmologica
 l simulation SIMBA.  In this talk\, I present the main results of my work 
 with SIMBA: the pathways for dust and cold gas in QGs up to z=2.  During t
 he talk I will show\, for the first time\, how different mechanisms\, both
  internal and environmental\, can affect the dust content after the cessat
 ion of the star formation. I will highlight how SIMBA predicts copious amo
 unts of dust in QGs at high-redshifts\, and paints a scenario in which que
 nching timescales and environments provide only a partial contribution to 
 the evolutionary pathways of the ISM. I will finally explain the main resu
 lt of my finding: a key new channel for dust re-formation in QGs. This inv
 olves a prolonged dust growth in the ISM\, which activates almost independ
 ently from the evolution of the molecular hydrogen gas\, presenting new ex
 citing predictions for future observers.\n\nhttps://events.ncbj.gov.pl/eve
 nt/300/contributions/1436/
LOCATION:NCBJ Room 207
URL:https://events.ncbj.gov.pl/event/300/contributions/1436/
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