Journal: Astronomy and Astrophysics

  • Publication
    Hα line profiles for a sample of supergiant HII regions. I. The main spectral component
    We present an analysis of the Hα emission line profiles of a sample of giant extragalactic HII regions, selected from among the brightest and most isolated in a...
  • Publication
    Hα line profiles for a sample of supergiant HII regions. II. Broad, low intensity components
    We analyze the broad, low intensity, high velocity components that are seen in the Hα line profiles for a sample of HII regions. These HII regions are chosen...
  • Publication
    Hα spectropolarimetry of RY Tauri and PX Vulpeculae
    Aims: To detect line effects using spectropolarimetry in order to find evidence of rotating disks and their respective symmetry axes in T Tauri stars. Methods...
  • Publication
    Hα spectropolarimetry of the B[e] supergiant GG Carinae
    Aims. We study the geometry of the circumstellar environment of the B[e] supergiant star GG Car. Methods: We present observations acquired using the IAGPOL...
  • Publication
    Hβ spectroscopy of the high-inclination black hole transient Swift J1357.2−0933 during quiescence
    Swift J1357.2−0933 is a transient low-mass X-ray binary hosting a stellar-mass black hole. The source exhibits optical dips and very broad emission lines during...
  • Publication
    IACUB - a New Echelle Spectrograph for Use at the Observatorio del Roque-De
    An uncrossed echelle spectrograph has been constructed in a collaboration between the Queen's University of Belfast and the Instituto de Astrofísica de Canarias...
  • Publication
    IC 10: More evidence that it is a blue compact dwarf
    We present optical spectroscopy of H Ii regions in the Local Group galaxy IC 10 and UBVR photometry of foreground stars in three fields towards this galaxy...
  • Publication
    Identification of red high proper-motion objects in Tycho-2 and 2MASS catalogues using Virtual Observatory tools
    Aims: With available Virtual Observatory tools, we looked for new M dwarfs in the solar neighbourhood and M giants with high tangential velocities. Methods...
  • Publication
    Identification of red supergiants in nearby galaxies with mid-IR photometry
    Context. The role of episodic mass loss in massive-star evolution is one of the most important open questions of current stellar evolution theory. Episodic mass...