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UID:71@osups.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20260402T110000
DTEND;TZID=Europe/Paris:20260402T120000
DTSTAMP:20260319T121906Z
URL:https://osups.universite-paris-saclay.fr/calendrier/structure-and-poro
 sity-of-the-multiphase-ism-insights-from-nearby-star-forming-galaxies/
SUMMARY:Structure and porosity of the multiphase ISM : Insights from nearby
  star-forming galaxies
DESCRIPTION:par Lise Ramambason (University of Heidelberg)\n\nAbstract :\n\
 nNearby galaxies observed at high spatial resolution with JWST\, ALMA\, an
 d MUSE allow us to probe the multiscale feedback processes\, from giant mo
 lecular clouds to galactic scales. A key question is how ionizing photons 
 propagate through the complex\, multiphase interstellar medium (ISM): what
  allows them to escape from H II regions\, and how do they reshape the sur
 rounding gas?\nI will present results from the PHANGS-JWST survey on the e
 arliest dust-embedded phase of star formation within molecular clouds. The
 se observations show that the local structure\, chemistry\, and porosity o
 f the ISM regulate the early stellar feedback and potential escape of ioni
 zing radiation.\nEven when this small-scale structure is unresolved\, its 
 imprint remains in galaxy spectra. I will introduce a novel statistical fr
 amework that uses integrated emission lines to recover key aspects of the 
 ISM geometry and constrain the underlying distributions of parameters such
  as the density\, ionization parameter\, or escape\nfraction. Together\, t
 hese approaches link resolved studies of nearby galaxies to unresolved obs
 ervations of local and high redshift galaxies\, providing a consistent way
  to interpret how stellar feedback shapes galaxies across cosmic time.\n\n
 Lieu : IAS\, bât. 209D\, salle de cours au RDC\, à 11h\n\n&nbsp\;
CATEGORIES:Séminaires
LOCATION:IAS\, Bât. 121 rue Jean Teillac\, Orsay\, 91400\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Bât. 121 rue Jean Teillac\
 , Orsay\, 91400\, France;X-APPLE-RADIUS=100;X-TITLE=IAS:geo:0,0
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DTSTART:20260329T030000
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