High-precision acoustic helium signatures in 18 low-mass low-luminosity red giants. Analysis from more than four years of Kepler observations
Context. High-precision frequencies of acoustic modes in red giant stars are now available thanks to the long observing length and high quality of the light...
Impact on asteroseismic analyses of regular gaps in Kepler data
Context. The NASA Kepler mission has observed more than 190 000 stars in the constellations of Cygnus and Lyra. Around 4 years of almost continuous ultra high...
Influence of magnetic activity on the determination of stellar parameters through asteroseismology
Magnetic activity changes the gravito-acoustic modes of solar-like stars and in particular their frequencies. There is an angular-degree dependence that is...
Internal rotation and mixing in the massive star HD192575
The evolution of high mass stars (>8M_sun) is strongly dictated by their interior structure, specifically the mixing processes near the core and in the...
Internal rotation of 13 low-mass low-luminosity red giants in the Kepler field
Context. The Kepler space telescope has provided time series of red giants of such unprecedented quality that a detailed asteroseismic analysis becomes possible...
K2 photometry and HERMES spectroscopy of the blue supergiant ρ Leo: rotational wind modulation and low-frequency waves
We present an 80-d long uninterrupted high-cadence K2 light curve of the B1Iab supergiant ρ Leo (HD 91316), deduced with the method of halo photometry. This...
Kepler observations of the asteroseismic binary HD 176465
Binary star systems are important for understanding stellar structure and evolution, and are especially useful when oscillations can be detected and analysed...