Astrophysical: Stellar activity

  • Talk
    1st IAU-G5 seminar: The revolution of task-based computing, applied to stellar and planetary atmospheres
    (This seminar is organized by the IAU G5 commission on stellar and planetary atmospheres) Task-based computing is a method where computational problems are...
  • Publication
    An improved evolutionary model for stellar population applied to NGC 2903
    The revised physical assumptions incorporated into a previously published evolutionary model for stellar population synthesis in galaxies (Casuso et al., 1989)...
  • Publication
    Asteroseismology and Spectropolarimetry of the Exoplanet Host Star λ Serpentis
    The bright star λ Ser hosts a hot Neptune with a minimum mass of 13.6 M ⊕ and a 15.5 day orbit. It also appears to be a solar analog, with a mean rotation...
  • Publication
    Brightness Fluctuation Spectra of Sun-like Stars. I. The Mid-frequency Continuum
    We analyze space-based time-series photometry of Sun-like stars, mostly in the Pleiades, but also field stars and the Sun itself. We focus on timescales between...
  • Publication
    CA II H emission line cores of late-type dwarfs - Variability measurements and velocity field diagnostics
    High-resolution spectra of Alpha Cen B, Xi Boo A, 70 Oph A, and Epsilon Ind obtained using the Coude Echelle Spectrometer and the 1.4-m Coude Auxiliary...
  • Publication
    Chromospheres of late-type active and quiescent dwarfs. III - Variability of CA II H emission profiles
    We have used high-resolution spectra of the Ca II H resonance line in late-type dwarfs, obtained with high S:N ratios, over a period of four years to widen our...
  • Publication
    Chromospheric modelling in late-type dwarfs. II - CES observations of active and quiescent stars
    The characteristics of the chromospheres of late-type dwarf stars were studied using the CoudeEchelle Spectrograph (CES) at ESO and the IUE. The study focused...
  • Publication
    Correcting Exoplanet Transmission Spectra for Stellar Activity with an Optimized Retrieval Framework
    The chromatic contamination that arises from photospheric heterogeneities, e.g., spots and faculae on the host star presents a significant noise source for...
  • Publication
    Departures from axial symmetry, and starburst activity, in the bulge of NGC 4736
    Evidence for circumnuclear starbursts in spiral galaxies can take the form of a blue excess near the nucleus, but more frequently (because of dust extinction) H...