127 citations · 574 across the 16 of their papers we have counts for
7 papers · 1 filter
Testing the accuracy of Coimbra Astronomical Observatory solar filament historical series (1929-1941)
Ana Lourenço, Ricardo Gafeira, Vitor Bonifacio +3
The present work aims to validate the positions of solar filaments published in the Annals of Coimbra University Astronomical Observatory, currently the Geophysical and Astronomica…
Revisiting the mass- and radius-luminosity relations for FGK main-sequence stars
João Fernandes, Ricardo Gafeira, Johannes Andersen
Scaling relations are very useful tools for estimating unknown stellar quantities. Within this framework, eclipsing binaries are ideal for this goal because their mass and radius a…
Asteroseismic modelling of solar-type stars: A deeper look at the treatment of initial helium abundance
Benard Nsamba, Nuno Moedas, Tiago L. Campante +7
Detailed understanding of stellar physics is essential towards a robust determination of stellar properties (e.g. radius, mass, and age). Among the vital input physics used in the…
Mass-luminosity relation for FGK main sequence stars: metallicity and age contributions
Ricardo Gafeira, Carlos Patacas, João Fernandes
The stellar mass-luminosity relation (MLR) is one of the most famous empirical "laws", discovered in the beginning of the 20th century. MLR is still used to estimate stellar masses…
Application of Neural Networks to the study of stellar model solutions
F. J. G. Pinheiro, T. Simas, J. Fernandes +1
Artificial neural networks (ANN) have different applications in Astronomy, including data reduction and data mining. In this work we propose the use ANNs in the identification of s…
Higher depletion of lithium in planet host stars: no age and mass effect
S. G. Sousa, J. Fernandes, G. Israelian +1
Recent observational work by Israelian et al. has shown that sun-like planet host stars in the temperature range 5700K < Teff < 5850K have lithium abundances that are significantly…