Astrophysical: H II regions

  • Publication
    A very dark stellar system lost in Virgo: kinematics and metallicity of SECCO 1 with MUSE
    We present the results of VLT-MUSE (Very Large Telescope-Multi Unit Spectroscopic Explorer) integral field spectroscopy of SECCO 1, a faint, star-forming...
  • Publication
    About Metallicity Variations in the Local Galactic Interstellar Medium
    In this paper we discuss and confront recent results on metallicity variations in the local interstellar medium, obtained from observations of H II regions and...
  • Publication
    Abundance analysis of giant H II regions in M51
    Spectrophotometric observations in the optical and near-infrared of six giant H II regions in the high metallicity spiral galaxy M51 are presented. Five of the...
  • Publication
    Abundance analysis of giant H II regions in nearby spirals.
    Spectrophotometric data of giant H II regions covering the spectral range from λ3600 to 9700 Å in the spiral galaxies M101 and M51 have been analyzed in order...
  • Publication
    Abundance calibration and evolution of giant H II regions
    This paper presents a self-consistent method to determine abundance and evolutionary status for giant H II regions (GHR) as well as the nominal temperature of...
  • Publication
    An evolutionary sequence of expanding hydrogen shells in galaxy discs
    Aims:Large HI shells, with diameters of hundreds of pc and expansion velocities of 10-20 km s-1 have been detected in their hundreds in the Milky Way and are...
  • News
    An old problem about the measurement of the chemical composition of the universe has been resolved
    Research carried out by a scientific team from the University of Heidelberg (UH), the Instituto de Astrofísica de Canarias (IAC) and the National Autonomous...
  • Publication
    Are Temperature Fluctuations Out There?
    The effect of temperature fluctuations in the spectra of ionized nebulae was firstly explored by Peimbert (1967). Since then, the problem of their existence has...
  • Publication
    Backscattering and Line Broadening in Orion
    Examination of emission lines in high-velocity-resolution optical spectra of the Orion Nebula confirms that the velocity component on the red wing of the main...