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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-8001
DTSTART:20221117T213000Z
DTEND:20221117T223000Z
DTSTAMP:20260414T152705Z
LAST-MODIFIED:20221107T144947Z
LOCATION:4421 Sterling Hall
SUMMARY:Introducing TIGRESS-NCR: current status of numerical modeling 
 of the star-forming ISM\, Astronomy Colloquium\, Dr. Chang-Goo Kim\, P
 rinceton University
DESCRIPTION:The importance of star formation “feedback” to the ene
 rgetics of the interstellar medium (ISM) has been appreciated througho
 ut the modern history of astronomy. Star formation is inefficient in g
 as consumption because feedback efficiently maintains the pressure sup
 port against gravity\, which is otherwise rapidly lost via cooling and
  turbulence dissipation. At the same time\, collective actions of feed
 back drive galactic-scale outflows\, controlling the baryonic cycle in
  galaxy halos. In this talk\, I will introduce the TIGRESS framework a
 nd its non-equilibrium cooling and radiation (NCR) extension. We solve
  magneto-hydrodynamics equations in a local shearing box representing 
 a patch of galactic disks to take advantage of limited outer dimension
 s (~kpc) to achieve uniformly high resolution (~pc). The TIGRESS-NCR f
 ramework synthesizes our current best knowledge on governing physics o
 f the star-forming ISM\, including supernova and UV radiation feedback
  as well as photochemical reactions associated with UV (and cosmic ray
 s) to set radiative heating rates and abundances for major coolants se
 lf-consistently. I will present the first results from a suite of simu
 lations using the TIGRESS-NCR framework and explain the co-regulation 
 of SFRs and the ISM. Specifically\, I will delineate the self-regulati
 on of SFRs in the context of pressure-regulated\, feedback-modulated s
 tar formation theory and ISM phase structure and energetics with detai
 led breakdowns into energy source/sink from different processes and in
  different phases. Finally\, I emphasize that having such a numerical 
 framework is a departure point for further numerical experiments\, inc
 luding models with spiral arms and at low metallicities.
URL:https://www.physics.wisc.edu/events/?id=8001
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