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FINITE RANK APPROXIMATION BASED METHOD FOR SOLVING THE RTE IN STELLAR ATMOSPHERES AND APPLICATION TO AN INVERSE PROBLEM
(EDP SCIENCES, 2006)
The Finite Rank Approximation (FRA) based method is well known in operator approximation theory but it is also useful for suggesting numerical methods for solving integral equations. In this document we describe two FRA ...
Aspects of stellar atmospheres and star formation
(Universidade Federal de Minas GeraisUFMG, 2000-07-05)
We initially investigate some processes that affect the stellar atmosphere, such as the gravity-brightening and limb-darkening, and the influence of the reflection effect on them. We study the gravity-brightening exponents ...
Using non-solar-scaled opacities to derive stellar parameters: Toward high-precision parameters and abundances
(EDP Sciences, 2018-12)
In an effort to improve spectroscopic methods of stellar parameters determination, we implemented non-solar-scaled opacities in a simultaneous derivation of fundamental parameters and abundances. We wanted to compare the ...
High stellar FUV/NUV ratio and oxygen contents in the atmospheres of potentially habitable planets
(Elsevier Science, 2014-01)
Recent observations of several planet-hosting M dwarfs show that most have FUV/NUV flux ratios 1000 times greater than that of the Sun. Here we show that the atmospheric oxygen contents (O2 and O3) of potentially habitable ...
DIATOMIC ANALYTIC MOLECULAR PARTITION FUNCTIONS FOR STELLAR ATMOSPHERES
(Revista Mexicana de Astronomía y Astrofísica, 2013)
ε-mechanism driven pulsations in hot subdwarf stars with mixed H-He atmospheres
(De Gruyter Open Ltd, 2017-04)
The ε mechanism is a self-excitation mechanism of stellar pulsations which acts in regions where nuclear burning takes place. It has been shown that the ε mechanism can excite pulsations in hot pre-horizontal branch stars ...
Effects of the selection function on metallicity trends in spectroscopic surveys of the Milky Way
(EDP SCIENCES S A, 2017)
Context. Large spectroscopic Galactic surveys imply a selection function in the way they performed their target selection.