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Blue lines as chromospheric diagnostics: The Si I lines at 3906 and 4103 Å
(IOP Publishing, 2001-05)
We present a complete atomic model for Si I line synthesis. We study how the computed profiles of two blue lines of this atom are influenced by the choice of the atomic parameters and find that, although several cross ...
Method for calculating the opacity of the atomic lines in stellar atmospheres
(The Astrophysical Journal, 2009)
Be star disc characteristics near the central object
(EDP Sciences, 2007-07)
Context. A recent analysis of visual Fell emission lines of 17 classic Be stars using the self-absorption curve (SAC) method revealed that these lines are optically thick and that they form in circumstellar disc (CD) regions ...
Chronostratigraphic constraints and paleoenvironmental interpretation of the Romualdo Formation (Santana Group, Araripe Basin, Northeastern Brazil) based on palynology
(2020-12-01)
The Santana Group of the Araripe Basin is a major paleontological unit in Brazil, incorporating two important Cretaceous Konservat-Lagerstätten. The lower formations are Aptian, but the age of the uppermost Romualdo Formation ...