Modeling spectroscopic signatures of stellar activity

• Grant number: 21/01303-3
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• Start date: March 01, 2021
• End date: February 28, 2026
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Stellar Astrophysics
• Principal Investigator: Jorge Luis Melendez Moreno
• Grantee: Gabriela Carvalho Silva
• 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): 23/16319-8 - Analysis of stellar activity signals in solar-type stars using Gaussian Processes, BE.EP.DD

Abstract

This project aims to better understand stellar activity through characterization of lines with chromospheric contribution, such as the Ca II H and K lines. We also intend to model the effect of stellar activity on radial velocities, which is key in our quest to characterize exoplanets, especially small planets such as super-Earths and in the future Earth analogs. (AU)

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)

CARVALHO-SILVA, GABRIELA; MELENDEZ, JORGE; RATHSAM, ANNE; SHEJEELAMMAL, J.; MARTOS, GIULIA; LORENZO-OLIVEIRA, DIEGO; SPINA, LORENZO; RIBEIRO ALVES, DEBORA. A New Age-Activity Relation For Solar Analogs that Accounts for Metallicity. Astrophysical Journal Letters, v. 983, n. 2, p. 7-pg., 2025-04-20. (23/16319-8, 21/01303-3, 22/05833-0, 22/10325-3, 18/04055-8)