Zobrazeno 1 - 10
of 188
pro vyhledávání: '"Alecian, G."'
Publikováno v:
A&A 668, A6 (2022)
Scandium is a key element of the Am star phenomenon since its surface under-abundance is one of the criteria that characterise such stars. Thanks to the availability of a sufficiently complete set of theoretical atomic data for this element, reliable
Externí odkaz:
http://arxiv.org/abs/2210.01715
Autor:
Alecian, G., LeBlanc, F.
The single-valued parameter (SVP) method is a parametric method that offers the possibility of computing radiative accelerations in stellar interiors much faster than other methods. It has been implemented in a few stellar evolution numerical codes f
Externí odkaz:
http://arxiv.org/abs/2008.10954
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
To enlarge our database of Chemically Peculiar (CP) stars, we compiled published data concerning the He-weak and He-rich stars observed by high-resolution spectroscopy techniques during last decades. Twenty He-weak and 28 He-rich stars have been adde
Externí odkaz:
http://arxiv.org/abs/1906.06984
This talk is devoted to the statistical analysis of the new catalogue of Chemically Peculiar stars compiled from papers, where chemical abundances of those stars were given. The catalogue contains chemical abundances and physical parameters of 428 st
Externí odkaz:
http://arxiv.org/abs/1812.04885
Autor:
Alecian, G., Stift, M. J.
Calculating abundance stratifications in ApBp/HgMn star atmospheres, we are considering mass-loss in addition to atomic diffusion in our numerical code in order to achieve more realistic models. These numerical simulations with mass-loss solve the ti
Externí odkaz:
http://arxiv.org/abs/1811.02267
In this paper we present a new catalogue of Chemically Peculiar (CP) stars obtained by compiling publications in which abundances of metals are provided. Our catalogue includes 428 stars for which the data were obtained through spectroscopic observat
Externí odkaz:
http://arxiv.org/abs/1807.06902
Autor:
Deal, M., Alecian, G., Lebreton, Y., Goupil, M. J., Marques, J. P., LeBlanc, F., Morel, P., Pichon, B.
Publikováno v:
A&A 618, A10 (2018)
Chemical element transport processes are among the crucial physical processes needed for precise stellar modelling. Atomic diffusion by gravitational settling nowadays is usually taken into account, and is essential for helioseismic studies. On the o
Externí odkaz:
http://arxiv.org/abs/1806.10533
Autor:
Alecian, G., Stift, M. J.
Numerical models for the atmospheres of magnetic ApBp stars have in the past dealt only with centred dipole magnetic field geometries. These models include atomic diffusion that stratifies the abundances of metals according to the local magnetic fiel
Externí odkaz:
http://arxiv.org/abs/1702.08322
Autor:
Alecian, G.
Recently published empirical abundance maps, obtained through (Zeeman) Doppler mapping (ZDM), do not currently agree with the abundance structures predicted by means of numerical models of atomic diffusion in magnetic atmospheres of ApBp stars. In a
Externí odkaz:
http://arxiv.org/abs/1509.08676