Astrofísicas: Técnicas

  • Publicación
    Spectropolarimetry in a sunspot penumbra. Spatial dependence of Stokes asymmetries in Fe I 1564.8 nm
    Stokes profiles of sunspot penumbrae show distinct asymmetries, which point to gradients in the velocity field and in the magnetic field. We present...
  • Publicación
    Spectropolarimetry of 3C 265, a misaligned radio galaxy
    We present spectropolarimetry of the powerful radio galaxy 3C 265 at z=0.811. The rest-frame UV continuum, which has an elongated structure misaligned by about...
  • Publicación
    Spectroscopic and dynamical properties of comet C/2018 F4, likely a true average former member of the Oort cloud
    Context. The population of comets hosted by the Oort cloud is heterogeneous. Most studies in this area have focused on highly active objects, those with small...
  • Publicación
    Spectroscopic characterization of the known O-star population in Cygnus OB2. Evidence of multiple star-forming bursts
    Context. Cygnus OB2 provides a unique insight into the high-mass stellar content in one of the largest groups of young massive stars in our Galaxy. Although...
  • Publicación
    Spectroscopic characterization of the stellar content of ultra-diffuse galaxies
    Understanding the peculiar properties of ultra-diffuse galaxies (UDGs) via spectroscopic analysis is a challenging task requiring very deep observations and...
  • Publicación
    Spectroscopic classification of red high proper motion objects in the Southern Sky
    We present the results of spectroscopic follow-up observations for a sample of 71 red objects with high proper motions in the range 0.08-1.14 arcsec yr-1 as...
  • Publicación
    Spectroscopic classification of X-ray selected stars in the rho Ophiuchi star-forming region and vicinity
    We present intermediate-resolution (FWHM~1.5-2.6 Angstroms) optical spectra of 106 candidate optical counterparts of 77 X-ray sources detected in four pointed...
  • Publicación
    Spectroscopic hint of a cold stream in the direction of the globular cluster NGC 1851
    We present the results of a spectroscopic survey performed in the outskirts of the globular cluster NGC 1851 with VIsible MultiObject Spectrograph (VIMOS)/Very...
  • Publicación
    Spectroscopic observations of the δ Scorpii binary during its recent periastron passage
    The bright star delta Sco has been considered a typical B0-type object for many years. Spectra of the star published prior to 1990 showed no evidence of...