منابع مشابه
The Impact of Star Formation on Cool Core Galaxy Clusters
We present results from recent simulations of the formation and evolution of clusters of galaxies in a ΛCDM cosmology. These simulations contain our most physically complete input physics to date including radiative cooling, star formation that transforms rapidly cooling material into aggregate star particles and we also model the thermal feedback from resulting supernovae in the star particles...
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I present the widely used model atmosphere codes ATLAS, MARCS, and PHOENIX, and I compare their output model structures and spectra for cool stars of FGKMtypes. While model atmosphere stratifications agree closely with each other in the 1-D approximation, this is not the case for spectra. Differences between model spectra from different codes are largest in the blue-UV, but smaller differences ...
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Abundance analysis of the cool extreme helium (EHe) star LSS 3378 is presented. The abundance analysis is done using LTE line formation and LTE model atmospheres constructed for EHe stars. The atmosphere of LSS 3378 shows evidence of H-burning, He-burning, and sprocess nucleosynthesis. The derived abundances of iron-peak and α-elements indicate absence of selective fractionation or any other pr...
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The star-matrix models are difficult to solve due to the multiple powers of the Vandermonde determinants in the partition function. We apply to these models a modified Q-matrix approach and we get results consistent with those obtained by other methods.As examples we study the inhomogenous gaussian model on Bethe tree and matrix q-Potts-like model. For the last model in the special cases q = 2 ...
متن کامل'Cool', Brands and 'Cool' Brands
The term ‘cool’ is widely used expression in popular culture. This word is prefixed liberally with anything including people, behavior, place and brands. Notwithstanding ambiguity about what it stands there is complete clarity that it certainly adds value. ‘Cool’ in this perspective is precious resource which can be used in brand building. The authors’ exploration into its genesis and meaning r...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1997
ISSN: 0074-1809
DOI: 10.1017/s0074180900009608