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SUMMARY:Marília Carlos (National Observatory of Brazil): Detailed chemica
 l composition of solar analogues with and without planets
DTSTART:20260423T120000Z
DTEND:20260423T130000Z
DTSTAMP:20260424T204200Z
UID:indico-event-2009@indico.uu.se
DESCRIPTION:Title: Detailed chemical composition of solar analogues with a
 nd without planets Speaker: Marília Carlos Affiliation: National Observ
 atory of Brazil Room: Å101121\, Sonja Lyttkens Time: 14:00-15:00 Abstr
 act: The detailed chemical compositions of planet-hosting stars provide v
 ital clues on the formation and composition of exoplanetary systems. A rec
 ent analysis by Pavlenko et al. (2019) suggests that planet-hosting stars 
 tend to have larger C/O abundance ratios than stars without confirmed plan
 ets at given metallicity. This signature was solidified in Amarsi et al. (
 2019) via a three dimensional non-local thermodynamic equilibrium (3D NLTE
 ) analysis of about 60 F- and G-dwarfs in the thin disk. Here\, I will pre
 sent results from a detailed and extended reanalysis of the Amarsi et al. 
 (2019) sample. We take advantage of high resolution and high S/N spectra f
 rom HARPS\, and correct to 1D and 3D NLTE where possible\, in order to det
 ermine Li\, Na\, Mg\, Al\, Si\, S\, Ca\, Sc\, Ti\, V\, Cr\, Mn\, Co\, Ni\,
  Cu and Zn abundances with high precision and accuracy. I will contrast th
 e result for stars with and without confirmed planets\, and discuss the po
 ssible implications on our understanding of exoplanetary systems.\n\nhttps
 ://indico.uu.se/event/2009/
LOCATION:Å101121\, Sonja Lyttkens
URL:https://indico.uu.se/event/2009/
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