4 papers
Planet engulfment in the chemically anomalous HD 129171/HD 129209 pair
Anne Rathsam, Jorge Meléndez, Rodolfo Smiljanic +2
Binary systems composed of stars with similar parameters should have identical chemical composition. However, many chemically anomalous pairs have been found in the literature, suc…
Signatures of planets and Galactic subpopulations in solar analogs. Precise chemical abundances with neural networks
Giulia Martos, Jorge Meléndez, Lorenzo Spina +1
The aim of this work is to obtain precise atmospheric parameters and chemical abundances automatically for solar twins and analogs to find signatures of exoplanets, as well as to a…
A New Age-Activity Relation For Solar Analogs that Accounts for Metallicity
Gabriela Carvalho-Silva, Jorge Meléndez, Anne Rathsam +5
Determining stellar ages is challenging, particularly for cooler main-sequence stars. Magnetic evolution offers an observational alternative for age estimation via the age-chromosp…
A simple model for spectroscopic analyses of active stars
T. Nordlander, M. Baratella, L. Spina +1
Spectroscopic analyses of young late-type stars suffer from systematic inaccuracies, typically under-estimating metallicities but over-estimating abundances of certain elements inc…