Journal: Astronomy and Astrophysics

  • 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...
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    Photospheric downward plasma motions in the quiet Sun
    Context. We analyze spectropolarimetric data taken with the Hinode spacecraft in quiet solar regions at the disk center. Distorted redshifted Stokes V profiles...
  • Publication
    Photospheric Hanle diagnostic of weak magnetic dipoles in stars
    Aims: We propose and explore a new diagnostic technique based upon the linear polarization emitted in Hanle-sensitive lines in disk-integrated stars where a...
  • Publication
    Photospheric magnetic topology of a north polar region
    Aims: We aim to characterise the magnetism of a large fraction of the north polar region close to a maximum of activity, when the polar regions are reversing...
  • Publication
    Physical and dynamical properties of the unusual V-type asteroid (2579) Spartacus
    Context. Asteroid (2579) Spartacus is a small V-type object located in the inner main belt. This object shows spectral characteristics unusual for typical...
  • Publication
    Physical conditions in the partially ionized zone of the Orion nebula
    We report the first reliable measurement of the nebular [O i] lambda 5577 emission line in the Orion nebula. Diagnostic diagrams based on the [O i] lambda...
  • Publication
    Physical limits to the validity of synthesis models. The Lowest Luminosity Limit
    In this paper we establish a necessary condition for the application of stellar population synthesis models to observed star clusters. Such a condition is...
  • Publication
    Physical parameters and multiplicity of five southern close eclipsing binaries
    Aims:We detected tertiary components of close binaries from spectroscopy and light curve modelling, investigated the light-travel time effect and the...
  • Publication
    Physical parameters of red supergiants in dwarf irregular galaxies in the Local Group
    Context. Increasing the statistics of evolved massive stars in the Local Group enables investigating their evolution at different metallicities. During the late...