Journal: Astronomy and Astrophysics

  • Publication
    Photometric variability of LBV-candidate stars and Hubble-Sandage variables A, B, C and 2 in M 33
    We present the photometric history of some Luminous Blue Variable candidate stars in M 33. The search for outbursts was made in photographic plates taken in the...
  • Publication
    Photometric variability of young brown dwarfs in the σ Orionis open cluster
    We have carried out multi-epoch, time-series differential I-band photometry of a large sample of objects in the south-east region of the young (˜3 Myr), nearby...
  • Publication
    Photometry and asteroseismology of delta Scuti stars in Praesepe
    We discuss observations and seismic analyses for three multi-periodic delta Scuti stars in the Praesepe cluster: BU, BN and BV Cnc. For two stars (BU and BN Cnc...
  • Publication
    Photometry of SN 2002bo with template image subtraction
    VRI photometry of the type Ia supernova 2002bo is presented. This SN exploded in a dusty region of the host galaxy NGC 3190, thus, subtraction of a template...
  • Publication
    Photometry of sunspot pores from partial eclipse observations.
    White-light images, centered at λ6708A, were obtained at the Swedish Solar Telescope, La Palma, on occasion of the 1994 May 10 partial solar eclipse. From the...
  • Publication
    Photospheric activity of the Sun with VIRGO and GOLF. Comparison with standard activity proxies
    We study the variability of solar activity using new photospheric proxies originally developed for the analysis of stellar magnetism with the CoRoT and Kepler...
  • Publication
    Photospheric activity, rotation, and radial velocity variations of the planet-hosting star CoRoT-7
    Context. The CoRoT satellite has recently discovered the transits of an Earth-like planet across the disc of a late-type magnetically active star dubbed CoRoT-7...
  • Publication
    Photospheric activity, rotation, and star-planet interaction of the planet-hosting star CoRoT-6
    Context. The CoRoT satellite has recently discovered a hot Jupiter that transits across the disc of a F9 main-sequence star called CoRoT-6 with a period of 8...
  • Publication
    Photospheric and chromospheric magnetic activity of seismic solar analogs. Observational inputs on the solar-stellar connection from Kepler and Hermes
    We identify a set of 18 solar analogs among the seismic sample of solar-like stars observed by the Kepler satellite rotating between 10 and 40 days. This set is...