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Aims. Recent observations have challenged our understanding of rotational mixing in massive stars by revealing a population of… Expand The complex electric modulus and the ac conductivity of carbon nanoonion/polyaniline composites were studied from 1 mHz to 1 MHz… Expand Context. Models of stellar structure and evolution can be constrained by measuring accurate parameters of detached eclipsing… Expand We present an update of our low-resolution spectroscopic follow-up and model atmosphere analysis of hot subdwarf stars from the… Expand Solution-processed tandem polymer solar cells are demonstrated using stacked perovskite, (TBA,H)Ca2Nb3O10 (CNO), semiconductor… Expand Context. IGR J17511–3057 is the second X-ray transient accreting millisecond pulsar discovered by INTEGRAL. It was in outburst… Expand Context. The second parameter (the first being metallicity) defining the distribution of stars on the horizontal branch (HB) of… Expand It is well appreciated that the description of overadiabatic convection affects the structure of the envelopes of luminous… Expand We present quantitative studies of eight late O- and early B-type supergiants in the Magellanic Clouds using far-ultraviolet Far… Expand A detailed spectroscopic analysis of the two compo- nents of the binary system Centauri has been carried out on the basis of… Expand