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...
-
PublicaciónK2 photometry and HERMES spectroscopy of the blue supergiant ρ Leo: rotational wind modulation and low-frequency waves
-
PublicaciónKepler 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...
-
PublicaciónKepler-91b: a planet at the end of its life. Planet and giant host star properties via light-curve variations
Context. The evolution of planetary systems is intimately linked to the evolution of their host stars. Our understanding of the whole planetary evolution...
-
PublicaciónKIC 4768731: a bright long-period roAp star in the Kepler field
We report the identification of 61.45 d-1 (711.2 μHz) oscillations, with amplitudes of 62.6 μmag, in KIC 4768731 (HD 225914) using Kepler photometry. This...
-
PublicaciónLithium abundance and rotation of seismic solar analogues. Solar and stellar connection from Kepler and Hermes observations
Context. Lithium abundance A(Li) and surface rotation are good diagnostic tools to probe the internal mixing and angular momentum transfer in stars. Aims: We...
-
PublicaciónMagnetic activity cycles in solar-like stars: The cross-correlation technique of p-mode frequency shifts
Aims: We set out to study the use of cross-correlation techniques to infer the frequency shifts that are induced by changing magnetic fields in p-mode...
-
PublicaciónMagnetic Activity Evolution of Solar-like Stars. I. S <SUB>ph</SUB>-Age Relation Derived from Kepler Observations
The ages of solar-like stars have been at the center of many studies such as exoplanet characterization or Galactic-archeology. While ages are usually computed...
-
PublicaciónMagnetic activity of F stars observed by Kepler
Context. The study of stellar activity is important because it can provide new constraints for dynamo models when combined with surface rotation rates and the...
-
PublicaciónMasses and ages for metal-poor stars. A pilot programme combining asteroseismology and high-resolution spectroscopic follow-up of RAVE halo stars
Context. Very metal-poor halo stars are the best candidates for being among the oldest objects in our Galaxy. Samples of halo stars with age determination and...