BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-9190
DTSTART:20250417T203000Z
DTEND:20250417T213000Z
DTSTAMP:20260413T201337Z
LAST-MODIFIED:20250407T134835Z
LOCATION:4421 Sterling Hall
SUMMARY:New Views of Exoplanet Atmosphere Physics and Chemistry from J
 WST\, Astronomy Colloquium\, Jonathan Fortney\, University of Californ
 ia\, Santa Cruz
DESCRIPTION:Giant planets and brown dwarfs are astrophysical objects w
 ith different formation locations – planets in disks and brown dwarf
 s (we think) in giant molecular clouds.  These different objects trans
 ition across the very same range of Teff\, with planets strongly influ
 enced by their parent star’s heating from “above\,” while brown 
 dwarfs inexorably cool from their interior\, which warms their atmosph
 eres from “below.”  This major energy difference can drive importa
 nt differences between atmospheres.  JWST has been revolutionizing our
  understanding of these cool atmospheres\, and in this talk I will dis
 cuss a range of modeling work that aims to confront a variety of high 
 signal-to-noise spectral observations\, in particular for objects belo
 w Teff = 1000 K\, where a number of major chemical transitions in thes
 e atmospheres occur.  Our work uncovers a wide range of physical proce
 sses\, including vertical mixing\, photochemistry\, and tidal heating\
 , which can all affect the structure and chemistry of cool atmospheres
 .  The significant diversity in spectra stress-test our models in uniq
 ue ways.
URL:https://www.physics.wisc.edu/events/?id=9190
END:VEVENT
END:VCALENDAR