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DTSTART;TZID=Europe/Rome:20240220T113000
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DTSTAMP:20260512T041216
CREATED:20240108T094535Z
LAST-MODIFIED:20240216T070810Z
UID:13394-1708428600-1708432200@www.oa-roma.inaf.it
SUMMARY:Colloquium Letizia Stanghellini - Advances in stellar and galactic evolution with the population of planetary nebula progenitors from the APOGEE DR17 survey
DESCRIPTION:Planetary nebulae (PNe) are the ejected gas and dust shells of Asymptotic Giant Branch (AGB) stars\, which represent the late life of low- and intermediate-mass stars (LIMS). With the advent of the APOGEE DR17 survey\, there is a purpose in comparing Red Giants (RGs) and PNe abundances to disclose their similarities and differences since such a comparison has been rarely\, and not recently\, done in the Milky Way. While we expect similarities in most of the alpha-element distributions across the two populations\, given their limited evolution in LIMS\, differences in Fe and S abundances allow us to determine their depletion due to grain condensation in post-AGB phases. Differences in N and C between PNe and their progenitors set new limits to their production in the late stages of LIMS evolution. Finally\, we use radial metallicity gradients from RGs and PNe and Gaia-calibrated distances to constrain galaxy evolution in the framework of the current chemical evolution models.
URL:https://www.oa-roma.inaf.it/event/colloquium-letizia-stanghellini/
LOCATION:Aula Gratton
CATEGORIES:Seminari
ORGANIZER;CN="Flavia Dell'Agli":MAILTO:flavia.dellagli@inaf.it
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