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SUMMARY:New HR-pyPopStar synthesis models: studying dwarf galaxy propertie
 s
DTSTART:20260320T090000Z
DTEND:20260320T110000Z
DTSTAMP:20260506T193600Z
UID:indico-event-50@indico.iparcos.ucm.es
DESCRIPTION:Speakers: Iker Millan Irigoyen (Max Planck Institute for Astro
 physics)\n\n\nLow-metallicity stellar populations are numerous in the Univ
 erse. Either as the remnants of the past history of the Milky Way and simi
 lar spiral galaxies or the young low-metallicity stellar populations that 
 are being observed in the local dwarf galaxies or at high-z galaxies recen
 tly found with JWST. In order to study those special environments\, we dev
 eloped new high-spectral-resolution models tailored for low-metallicity en
 vironments using the state-of-the-art stellar population synthesis code HR
 -PYPOPSTAR with up-to-date stellar libraries.  We compared the new spectr
 al energy distributions with the previous models of HR-PYPOPSTAR for solar
  metallicity and with other stellar population synthesis models. We found 
 agreement between all the models in the optical but found several differen
 ces between the models in the NIR molecular bands. These intrinsic differe
 nces can substantially affect the age\, metallicity and mass estimates der
 ived from restframe NIR data\, such as those obtained with VLT\, JWST. Fin
 ally\, we analysed a sub-sample of dwarf galaxies from the MaNGA survey an
 d we found that star-forming dwarf galaxies have higher stellar mass - mea
 n stellar metallicity relation than the average dwarf galaxies. These resu
 lts suggest that dwarf galaxies are very sensitive to sudden changes in th
 e Star Formation History.\n\n\nhttps://indico.iparcos.ucm.es/event/50/
LOCATION:00.303.0 - Aula 13 (Facultad de Ciencias Físicas)
URL:https://indico.iparcos.ucm.es/event/50/
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