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A grid of NLTE corrections for magnesium and calcium in late-type giant and supergiant stars: application to Gaia
formation radiative transfer stars late-type atmospheres abundances
2011/10/18
We investigate NLTE effects for magnesium and calcium in the atmospheres of late-type giant and supergiant stars. The aim of this paper is to provide a grid of NLTE/LTE equivalent width ratios W/W* of...
An aluminum/calcium-rich, iron-poor, white dwarf star: evidence for an extrasolar planetary lithosphere?
calcium-rich iron-poor evidence extrasolar planetary lithosphere
2011/10/8
The presence of elements heavier than helium in white dwarf atmospheres is often a signpost for the existence of rocky objects that currently or previously orbited these stars. We have measured the ab...
A Critical Examination of the X-Wind Model for Chondrule and Calcium-rich, Aluminum-rich Inclusion Formation and Radionuclide Production
Critical Examination Chondrule Calcium-rich Radionuclide Production
2010/11/16
Meteoritic data, especially regarding chondrules and calcium-rich, aluminumrich inclusions (CAIs), and isotopic evidence for short-lived radionuclides (SLRs)in the solar nebula, potentially can constr...
Calcium and light-elements abundance variations from high resolution spectroscopy in globular clusters
abundances stars evolution globular clusters general
2010/3/8
We use abundances of Ca, O, Na, Al from high resolution UVES spectra of 200 red giants in 17 globular clusters (GCs) to investigate the correlation found by Lee et al. (2009) between chemical enrichme...
STARK BROADENING PARAMETER TABLES FOR NEUTRAL CALCIUM SPECTRAL LINES. I
STARK BROADENING PARAMETER TABLES NEUTRAL CALCIUM SPECTRAL LINES
2009/3/19
Using a semiclassical approach, we have calculated electron−, proton−,
He II−, Mg II-, Si II- and Fe II-impact line widths and shifts for 189 Ca
I multiplets as a function of tempe...
STARK BROADENING PARAMETER TABLES FOR NEUTRAL CALCIUM SPECTRAL LINES. II
STARK BROADENING PARAMETER TABLES NEUTRAL CALCIUM SPECTRAL LINES
2009/3/18
Electron-, proton-, and ionized helium-impact broadening parameter
tables for neutral calcium spectral lines, have been presented as a function of the
temperature and the perturber density. Calculat...