Improved Ti II Log(gf) Values and Abundance Determinations in the Photospheres of the Sun and Metal-Poor Star HD?84937
作者： J. E. Lawler , C. Sneden , G. Nave , E. A. Den Hartog , N. Emrahoğlu
DOI: 10.3847/1538-4365/228/1/10
关键词:
摘要: Atomic transition probability measurements for 364 lines of Ti II in the UV through near-IR are reported. Branching fractions from data recorded using a Fourier transform spectrometer (FTS) and new echelle combined with published radiative lifetimes to determine these probabilities. The results generally good agreement previously reported FTS measurements. Use spectrometer, independent radiometric calibration methods, analysis routines enables reduction systematic errors overall improvement accuracy over previous applied high-resolution visible spectra Sun metal-poor star HD 84937 derive new, more accurate abundances. Lines covering range wavelength excitation potential used search non-LTE effects. abundances derived two stars match those I support relative Ti/Fe abundance ratio versus metallicity seen studies.
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