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PRODID:-//Astronomy Department - ECPv6.1.2.1//NONSGML v1.0//EN
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METHOD:PUBLISH
X-ORIGINAL-URL:https://www.ufrgs.br/astronomia/en
X-WR-CALDESC:Eventos para Astronomy Department
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TZID:America/Sao_Paulo
BEGIN:STANDARD
TZOFFSETFROM:-0300
TZOFFSETTO:-0300
TZNAME:-03
DTSTART:20260101T000000
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BEGIN:VEVENT
DTSTART;TZID=America/Sao_Paulo:20260415T133000
DTEND;TZID=America/Sao_Paulo:20260415T143000
DTSTAMP:20261021T061547
CREATED:20260303T132931Z
LAST-MODIFIED:20260408T181107Z
UID:4386-1776259800-1776263400@www.ufrgs.br
SUMMARY:Detailed chemical composition of solar analogues with and without planets - Marilia Carlos (ON/MCTI)
DESCRIPTION:Abstract: \nThe detailed chemical compositions of planet-hosting stars provide vital clues on the formation and composition of exoplanetary systems. A recent analysis by Pavlenko et al. (2019) suggests that planet-hosting stars tend to have larger C/O abundance ratios than stars without confirmed planets 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 present 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 from HARPS\, and correct to 1D and 3D NLTE where possible\, in order to determine 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 the result for stars with and without confirmed planets\, and discuss the possible implications on our understanding of exoplanetary systems. \n  \nYouTube link: https://youtube.com/live/FkbK6IYE4c4
URL:https://www.ufrgs.br/astronomia/en/event/detailed-chemical-composition-of-solar-analogues-with-and-without-planets-marilia-carlos-on-mcti/
LOCATION:Sala de VideoConf IF/UFRGS
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