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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: November 30, 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)

News published in Agência FAPESP Newsletter about the scholarship:
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Scientific publications
(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)
CARVALHO-SILVA, G.; BARRAGAN, O.; HAYWOOD, R. D.; MELENDEZ, J.; BARNES, S. A.. Stellar Rotation in an Old Solar Twin Using ESPRESSO/VLT Validates Gyrochronology. Astrophysical Journal Letters, v. 995, n. 2, p. 8-pg., . (18/04055-8, 23/16319-8, 21/01303-3)
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., . (23/16319-8, 21/01303-3, 22/05833-0, 22/10325-3, 18/04055-8)