Astrophysical: Starspots

  • Publication
    Rotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators
    We determine rotation periods of a sample of 48 late F-type to mid-M dwarf stars using time series high-resolution spectroscopy of the Ca II H&K and H α...
  • Publication
    Spot activity and circumstellar matter in II Peg.
    Infrared and V band photometry of the RS CVn system II Peg, carried out in 1984 and 1986, has been analysed with a simple model in order to follow the evolution...
  • Publication
    Starspots on the fastest rotators in the β Pictoris moving group
    Aims: We carried out high-resolution spectroscopy and BV(I)C photometric monitoring of the two fastest late-type rotators in the nearby β Pictoris moving group...
  • Publication
    Stellar activity and rotation of the planet host Kepler-17 from long-term space-borne photometry
    Context. The study of young Sun-like stars is fundamental to understanding the magnetic activity and rotational evolution of the Sun. Space-borne photometry by...
  • Publication
    Surface rotation and magnetic activity for 55,000+ Kepler solar-type stars
    Dark magnetic spots co-rotating with the stellar surface lead to quasi-periodic brightness variations, which enclose relevant information on stellar rotation...
  • Publication
    Surface Rotation and Photometric Activity for Kepler Targets. I. M and K Main-sequence Stars
    Brightness variations due to dark spots on the stellar surface encode information about stellar surface rotation and magnetic activity. In this work, we analyze...
  • Publication
    Surface Rotation and Photometric Activity for Kepler Targets. II. G and F Main-sequence Stars and Cool Subgiant Stars
    Dark magnetic spots crossing the stellar disk lead to quasiperiodic brightness variations, which allow us to constrain stellar surface rotation and photometric...
  • Publication
    Temporal variation of the photometric magnetic activity for the Sun and Kepler solar-like stars
    Context. The photometric time series of solar-like stars can exhibit rotational modulation, that is, brightness variations due to active regions co-rotating...
  • Publication
    The CARMENES search for exoplanets around M dwarfs. Benchmarking the impact of activity in high-precision radial velocity measurements
    Context. Current exoplanet surveys using the radial velocity (RV) technique are targeting M dwarfs because any habitable zone terrestrial-mass planets will...