Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Lopez, Ramon J. Garcia"'
Publikováno v:
Astrophys.J. 623 (2005) 460-471
UV, optical, and near-IR spectra of Vega have been combined to test our understanding of stellar atmospheric opacities, and to examine the possibility of constraining chemical abundances from low-resolution UV fluxes. We have carried out a detailed a
Externí odkaz:
http://arxiv.org/abs/astro-ph/0501213
Autor:
Martin, Eduardo L., Magazzu, Antonio, Lopez, Ramon J. Garcia, Randich, Sofia, Navascues, David Barrado y
Publikováno v:
Astron.Astrophys. 429 (2005) 1051-1055
We present measurements of the \ion{K}{i} $\lambda 7699$ line from spectra of 19 late-type members of the $\alpha$Persei cluster obtained with the Intermediate Dispersion Spectrograph at the Isaac Newton Telescope. These stars span a narrow range of
Externí odkaz:
http://arxiv.org/abs/astro-ph/0409450
We have observed the spectrum of Procyon A (F5IV) from 4559 to 5780 A with a S/N of ~ 1e3 and a resolving power of 2e5. We have measured the line bisectors and relative line shifts of a large number of Fe I and Fe II lines, comparing them to those fo
Externí odkaz:
http://arxiv.org/abs/astro-ph/0111055
An inversion technique to recover LTE one-dimensional model photospheres for late-type stars, which was previously applied to the Sun (Allende Prieto et al. 1998), is now employed to reconstruct, semi-empirically, the photospheres of cooler dwarfs: t
Externí odkaz:
http://arxiv.org/abs/astro-ph/9907368
Chemical analyses of late-type stars are usually carried out following the classical recipe: LTE line formation and homogeneous, plane-parallel, flux-constant, and LTE model atmospheres. We review different results in the literature that have suggest
Externí odkaz:
http://arxiv.org/abs/astro-ph/9907155
Convective line asymmetries in the optical spectrum of two metal-poor stars, Gmb1830 and HD140283, are compared to those observed for solar metallicity stars. The line bisectors of the most metal-poor star, the subgiant HD140283, show a significantly
Externí odkaz:
http://arxiv.org/abs/astro-ph/9907046
We present accurate measurements of the central wavelengths of 4947 atomic absorption lines in the solar optical spectrum. The wavelengths, precise to a level ~ 50-150 m/s, are given for both flux and disc-centre spectra, as measured in relatively re
Externí odkaz:
http://arxiv.org/abs/astro-ph/9803262
An inversion technique has been developed to recover LTE one-dimensional model photospheres for late-type stars from very high resolution, high signal-to-noise stellar line profiles. It is successfully applied to the Sun by using a set of clean Ti I,
Externí odkaz:
http://arxiv.org/abs/astro-ph/9802353
Autor:
Lopez, Ramon J. Garcia
Publikováno v:
Publications of the Astronomical Society of the Pacific, 1993 May 01. 105(687), 560-560.
Externí odkaz:
https://www.jstor.org/stable/40680068
