43 citations · 275 across the 20 of their papers we have counts for
8 papers · 1 filter
On the incidence of planet candidates in open clusters and a planet confirmation
I. C. Leão, B. L. Canto Martins, S. Alves +7
Detecting exoplanets in clusters of different ages is a powerful tool for understanding a number of open questions, such as how the occurrence rate of planets depends on stellar me…
Level of helium enhancement among M3's horizontal-branch stars
A. A. R. Valcarce, M. Catelan, J. Alonso-García +2
(Abridged) The color and luminosity distribution of horizontal branch (HB) stars in globular clusters are sensitive probes of their original helium abundances. However, recent anal…
Determination of the spectroscopic stellar parameters for 257 field giant stars
S. Alves, L. Benamati, N. C. Santos +6
The study of stellar parameters of planet-hosting stars, such as metallicity and chemical abundances, help us to understand the theory of planet formation and stellar evolution. He…
The rotational behavior of Kepler Stars with Planets
F. Paz-Chinchón, I. C. Leão, J. P. Bravo +6
We analyzed the host stars of the present sample of confirmed planets detected by Kepler and Kepler Objects of Interest (KOI) to compute new photometric rotation periods and to stu…
A catalog of rotational and radial velocities for evolved stars V. Southern stars
J. R. De Medeiros, S. Alves, S. Udry +3
Rotational and radial velocities have been measured for 1589 evolved stars of spectral types F, G and K and luminosity classes IV, III, II and Ib, based on observations carried out…
New Suns in the Cosmos?
D. B. de Freitas, I. C. Leão, C. E. F. Lopes +5
The present work reports on the discovery of three stars that we have identified to be rotating Sun-like stars, based on rotational modulation signatures inferred from light curves…