منابع مشابه
Far-UV Line Strengths in Elliptical Galaxies
Much of the far-UV emission from elliptical galaxies is thought to arise from extreme horizontal branch stars and related objects. Only about 10% of the stellar population needs to evolve through this phase even in galaxies with the strongest UV upturn. However it is not yet clear if this population represents the extreme low-metallicity or highmetallicty tail of the distribution, or rather ari...
متن کاملMany-electron singularity in X-ray photoemission and X-ray line spectra from metals
It is pointed out that the spectra of x-ray induced fast photoelectrons from metal should have a characteristic skew line shape resulting from Kondo-like manyelectron interactions of the metallic conduction electrons with the accompanying deep hole in the final state. The same line shape should also occur for the discrete line spectra of x-rays emitted from metals. This mechanism could account ...
متن کاملFirst principles calculation of rotational and ro - vibrational line strengths Spectra for H 2 D + and D 2 H +
Theory is developed for the calculation of dipole transition line strengths and frequencies for rotational and ro-vibrational transitions from wavefunctions expressed in the generalized body-fixed co-ordinates proposed by Sutcliffe and Tennyson (1986, Molec. Phys., 58, 1053). Computations using this theory produce calculated frequencies for the fundamental ro-vibrational transitions of H2 D+ an...
متن کاملGradients of Absorption Line Strengths in Elliptical Galaxies
We have re-studied line-strength gradients of 80 elliptical galaxies. Typical metallicity gradients of elliptical galaxies are ∆[Fe/H]/∆ log r ' −0.3 which is flatter than the gradients predicted by monolithic collapse simulations. The metallicity gradients do not correlate with any physical properties of galaxies, including central and mean metallicities, central velocity dispersions σ0, absol...
متن کاملPhotoelectron spectra of hydrated electron clusters: Fitting line shapes and grouping isomers.
The photoelectron spectra of (H2O)(n = 2-69) - and (D2O)(n = 2-23) - are presented, and their spectral line shapes are analyzed in detail. This analysis revealed the presence of three different groupings of species, each of which are seen over the range, n = 11-16. These three groups are designated as dipole boundlike states, seen from n = 2-16, intermediate states, found from n = 6-16, and bul...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1968
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/139.3.273