Journal: Astronomy and Astrophysics

  • Publication
    Pleiades low-mass brown dwarfs: the cluster L dwarf sequence
    Aims.We present a search for low-mass brown dwarfs in the Pleiades open cluster. The identification of Pleiades members fainter and cooler than those currently...
  • Publication
    PM 1-322: New variable planetary nebula
    Context. Spectra of planetary nebulae (PNe) are characterised by strong forbidden emission lines and often also by an infrared (IR) excess. A few PNe show dust...
  • Publication
    PMAS optical integral field spectroscopy of luminous infrared galaxies. II. Spatially resolved stellar populations and excitation conditions
    Context. The general properties (e.g., activity class, star formation rates, metallicities, extinctions, average ages, etc.) of luminous (LIRGs) and...
  • Publication
    Polarimetric and spectroscopic optical observations of the ultra-compact X-ray binary 4U 0614+091
    Aims: We present a polarimetric and spectroscopic study of the persistent ultra-compact X-ray binary 4U 0614+091 aimed at searching for the emission of a...
  • Publication
    Polarimetric Littrow Spectrograph - instrument calibration and first measurements
    We present first measurements and the calibration procedure for the Polarimetric Littrow Spectrograph (POLIS) operated at the Vacuum Tower Telescope on Tenerife...
  • Publication
    Polarimetry of Li-rich giants
    Context: .Protoplanetary nebulae typically present non-spherical envelopes. The origin of such geometry is still controversial. There are indications that it...
  • Publication
    Polarimetry of the binary PDS 144
    Aims: Our goal is to study the circumstellar environment associated with each component of the wide intermediate-mass pre-main sequence binary system PDS 144...
  • Publication
    Polarisation of very-low-mass stars and brown dwarfs. I. VLT/FORS1 optical observations of field ultra-cool dwarfs
    Context: Ultra-cool dwarfs of the L spectral type (T_eff = 1400-2200 K) are known to have dusty atmospheres. Asymmetries of the dwarf surface may arise from...
  • Publication
    Polarization of changing-look quasars
    If the disappearance of the broad emission lines observed in changing-look quasars originates from the obscuration of the quasar core by dusty clouds moving in...