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• W2143144429 endingPage "270" @default.
• W2143144429 startingPage "257" @default.
• W2143144429 abstract "<i>Aims. <i/>We aim to assess the nature of three WNh stars in the SMC, to constrain stellar evolution beyond the main sequence at low metallicity, and to investigate the metallicity dependence of the clumping properties of massive stars. <i>Methods. <i/>We compute atmosphere models to derive the stellar and wind properties of the three WNh targets. A FUV/UV/optical/near-infrared analysis gives access to temperatures, luminosities, mass loss rates, terminal velocities and stellar abundances.<i>Results. <i/>We find that all stars still have a large hydrogen mass fraction in their atmosphere, and show clear signs of CNO processing in their surface abundances. One of the targets can be accounted for by normal stellar evolution. It is a star with an initial mass around 40-50 in, or close to, the core He burning phase. The other two objects likely follow a peculiar evolution, governed by fast rotation. In particular, one object is likely evolving homogeneously due to its position blue-ward of the main sequence and its high H mass fraction. The clumping factor of one star is found to be 0.15 <i>±<i/> 0.05. This is comparable to values found for Galactic Wolf-Rayet stars, indicating that within the uncertainties, the clumping factor does not seem to depend on metallicity." @default.
• W2143144429 created "2016-06-24" @default.
• W2143144429 creator A5009711392 @default.
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• W2143144429 creator A5066138777 @default.
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• W2143144429 creator A5076424538 @default.
• W2143144429 date "2008-12-22" @default.
• W2143144429 modified "2023-10-18" @default.
• W2143144429 title "Properties of WNh stars in the Small Magellanic Cloud: evidence for homogeneous evolution" @default.
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• W2143144429 doi "https://doi.org/10.1051/0004-6361:200811014" @default.
• W2143144429 hasPublicationYear "2008" @default.
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