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128 papers · 1 filter
Noncommutative Black Holes and the Singularity Problem
C. Bastos, O. Bertolami, N. C. Dias +1
A phase-space noncommutativity in the context of a Kantowski-Sachs cosmological model is considered to study the interior of a Schwarzschild black hole. Due to the divergence of th…
Bayesian peak-bagging of solar-like oscillators using MCMC: A comprehensive guide
R. Handberg, T. L. Campante
Context: Asteroseismology has entered a new era with the advent of the NASA Kepler mission. Long and continuous photometric observations of unprecedented quality are now available…
Non-Canonical Phase-Space Noncommutativity and the Kantowski-Sachs singularity for Black Holes
Catarina Bastos, Orfeu Bertolami, Nuno Costa Dias +1
We consider a cosmological model based upon a non-canonical noncommutative extension of the Heisenberg-Weyl algebra to address the thermodynamical stability and the singularity pro…
Measuring Be depletion in cool stars with exoplanets
Elisa Delgado Mena, Garik Israelian, Jonay I. González Hernández +2
We present new UVES spectra of a sample of 14 mostly cool unevolved stars with planetary companions with the aim of studying possible differences in Be abundance with respect to st…
Asteroseismic modelling of the solar-type subgiant star Hydri
I. M. Brandão, G. Dogan, J. Christensen-Dalsgaard +6
Comparing models and data of pulsating stars is a powerful way to understand the stellar structure better.βHyi is an evolved solar-type pulsator with mixed modes in its frequency s…
The HARPS search for southern extra-solar planets: XXVI: Seven new planetary systems
C. Moutou, M. Mayor, G. Lo Curto +10
We are conducting a planet search survey with HARPS since seven years. The volume-limited stellar sample includes all F2 to M0 main-sequence stars within 57.5 pc, where extrasolar…