Zobrazeno 1 - 8
of 8
pro vyhledávání: '"de Lis, S. Bertran"'
The use of 3D hydrodynamical simulations of stellar surface convection for model atmospheres is computationally expensive. Although these models have been available for quite some time, their use is limited because of the lack of extensive grids of s
Externí odkaz:
http://arxiv.org/abs/2202.12086
Autor:
Mena, E. Delgado, Adibekyan, V., Santos, N. C., Tsantaki, M., Hernández, J. I. González, Sousa, S. G., de Lis, S. Bertrán
Publikováno v:
A&A 655, A99 (2021)
[ABRIDGED]We study the carbon abundances with a twofold objective. On the one hand, we want to evaluate the behaviour of carbon in the context of Galactic chemical evolution. On the other hand, we focus on the possible dependence of carbon abundances
Externí odkaz:
http://arxiv.org/abs/2109.04844
Autor:
de Lis, S. Bertran, Prieto, C. Allende, Majewski, S. R., Schiavon, R. P., Holtzman, J. A., Shetrone, M., Carrera, R., Pérez, A. E. García, Mészáros, Sz., Frinchaboy, P. M., Hearty, F. R., Nidever, D. L., Zasowski, G., Ge, J.
Publikováno v:
A&A 590, A74 (2016)
We examine the distribution of the [O/Fe] abundance ratio in stars across the Galactic disk using H-band spectra from the Apache Point Galactic Evolution Experiment (APOGEE). We minimize systematic errors by considering groups of stars with similar a
Externí odkaz:
http://arxiv.org/abs/1603.05491
Publikováno v:
A&A 576, A89 (2015)
We present a detailed and uniform study of oxygen abundance from two different oxygen lines at 6158$\AA$ and 6300$\AA$ in a large sample of solar-type stars. The results are used to check the behaviour of these spectral lines as oxygen abundance indi
Externí odkaz:
http://arxiv.org/abs/1501.05805
Autor:
Mena, E. Delgado, de Lis, S. Bertrán, Adibekyan, V. Zh., Sousa, S. G., Figueira, P., Mortier, A., Hernández, J. I. González, Tsantaki, M., Israelian, G., Santos, N. C.
Publikováno v:
A&A 576, A69 (2015)
We find that hot jupiter host stars within the T$_\mathrm{eff}$ range 5900-6300K show lower Li abundances, by 0.14 dex, than stars without detected planets. This offset has a significance at the level 7$\sigma$, pointing to a stronger effect of plane
Externí odkaz:
http://arxiv.org/abs/1412.4618
Autor:
Adibekyan, V. Zh., Hernandez, J. I. Gonzalez, Mena, E. Delgado, Sousa, S. G., Santos, N. C., Israelian, G., Figueira, P., de Lis, S. Bertran
A long and thorough investigation of chemical abundances of planet-hosting stars that lasted for more than a decade has finally beared fruit. We explore a sample of 148 solar-like stars to search for a possible correlation between the slopes of the a
Externí odkaz:
http://arxiv.org/abs/1410.7594
Autor:
Adibekyan, V. Zh., Hernandez, J. I. Gonzalez, Mena, E. Delgado, Sousa, S. G., Santos, N. C., Israelian, G., Figueira, P., de Lis, S. Bertran
Publikováno v:
A&A, 564, L15, 2014
We explore a sample of 148 solar-like stars to search for a possible correlation between the slopes of the abundance trends versus condensation temperature (known as the Tc slope) with stellar parameters and Galactic orbital parameters in order to un
Externí odkaz:
http://arxiv.org/abs/1404.4514
Autor:
Racero, E., Ibarra, A., Ocaña, F., de Lis, S. Bertran, Ponz, J. D., Castillo, M., Sánchez-Portal, M.
Publikováno v:
ASP Conference Series; 2015, p231-234, 4p