Planetary chemical signatures in the spectrum of solar twin stars

• Grant number: 22/05833-0
• Support Opportunities: Scholarships in Brazil - Master
• Start date: September 01, 2022
• End date: February 28, 2025
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Stellar Astrophysics
• Principal Investigator: Jorge Luis Melendez Moreno
• Grantee: Giulia Martos
• Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 18/04055-8 - High precision spectroscopy: from the first stars to planets, AP.TEM
• Associated scholarship(s): 23/15044-5 - Precise chemical abundances for solar twins using Machine Learning, BE.EP.MS

Abstract

The objective of the project is to study spectra of solar twin stars in order to identify and analyze spectroscopic chemical signatures of planetary material. We will extend the sample of solar twins which were previously analyzed with high precision, to better characterize how rare the chemical composition of the Sun is and to study the evolution of chemical abundances in the Galactic disk, using a better quality dataset than in previous works. The study is important because it makes the relationship between the abundance of chemical elements present in the star and the existence of planets around it clearer, and may contribute, in the future, to the understanding of the formation of planetary systems similar to the Solar System. As the ages of our sample can be obtained with high precision, as a by-product we will establish the chemical evolution of the Galaxy as a function of stellar age.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MARTOS, GIULIA; MELENDEZ, JORGE; RATHSAM, ANNE; SILVA, GABRIELA CARVALHO. Metallicity and age effects on lithium depletion in solar analogues. Monthly Notices of the Royal Astronomical Society, v. 522, n. 3, p. 10-pg., 2023-05-02. (18/04055-8, 22/05833-0, 20/12679-1)