44 citations · 134 across the 9 of their papers we have counts for
9 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…
The chemical evolution of the Milky Way thin disk using solar twins
Anastasiia Plotnikova, Lorenzo Spina, Bridget Ratcliffe +2
In this study we address whether the age--metallicity relation (AMR) deviates from the expected trend of metallicity increasing smoothly with age. We also show the presence (or abs…
Carbon, isotopic ratio C/C and nitrogen in solar twins: constraints for the chemical evolution of the local disc
Rafael Botelho, Andre Milone, Jorge Melendez +3
Abundances of light elements in dwarf stars of different ages are important constraints for stellar yields, Galactic chemical evolution and exoplanet chemical composition studies.…
Detailed chemical compositions of planet hosting stars: I. Exploration of possible planet signatures
F. Liu, D. Yong, M. Asplund +5
We present a line-by-line differential analysis of a sample of 16 planet hosting stars and 68 comparison stars using high resolution, high signal-to-noise ratio spectra gathered us…
Thorium in solar twins: implications for habitability in rocky planets
Rafael B. Botelho, Andre de C. Milone, Jorge Melendez +10
We have investigated the thorium (Th) abundance in a sample of 53 thin disc solar twins covering a wide range of ages. These data provide constrains on the mantle energy budget of…
The Solar Twin Planet Search II. A Jupiter twin around a solar twin
M. Bedell, J. Melendez, J. L. Bean +8
Through our HARPS radial velocity survey for planets around solar twin stars, we have identified a promising Jupiter twin candidate around the star HIP11915. We characterize this K…