75 citations · 319 across the 9 of their papers we have counts for
9 papers
Accurate effective temperature from H profiles
Riano E. Giribaldi, Maria L. Ubaldo-Melo, Gustavo F. Porto de Mello +4
The determination of stellar effective temperature () in F, G, and K stars using H profile fitting is a quite remarkable and powerful tool, because it practica…
Exploring the Brown Dwarf Desert: New Substellar Companions from the SDSS-III MARVELS Survey
Nolan Grieves, Jian Ge, Neil Thomas +27
Planet searches using the radial velocity technique show a paucity of companions to solar-type stars within ~5 AU in the mass range of ~10 - 80 M. This deficit, know…
The Alpha Centauri Binary System: Atmospheric Parameters and Element Abundances
G. F. Porto de Mello, W. Lyra, G. R. Keller
The alpha Centauri binary system, owing to its duplicity, proximity and brightness, and its components' likeness to the Sun, is a fundamental calibrating object for the theory of s…
Ruthenium and hafnium abundances in giant and dwarf barium stars
D. M. Allen, G. F. Porto de Mello
We present abundances for Ru and Hf, compare them to abundances of other heavy elements, and discuss the problems found in determining Ru and Hf abundances with laboratory gf-value…
Abundance analysis of barium and mild barium stars
R. Smiljanic, G. F. Porto de Mello, L. da Silva
High signal to noise, high resolution spectra were obtained for a sample of normal, mild barium, and barium giants. Atmospheric parameters were determined from the FeI and FeII lin…
Dynamical evidence of the age--metallicity relation in the Milky Way disk
H. J. Rocha-Pinto, R. H. O. Rangel, G. F. Porto de Mello +2
We studied the relationship between the average stellar abundance of several elements and the orbital evolution of stars in the neighbourhood of the Sun, using both observational d…