Astrophysical: Spiral galaxies

  • Publication
    Observational evidence for triggering in spirals.
    The authors discuss recent evidence that the massive star formation in the grand-design spiral galaxy M51 is triggered. Studying the symmetry of the Hα...
  • Publication
    Observations of outflow and its consequences in circum-nuclear zones of spirals
    The radial hydrogen (H2 + HI) distribution in spirals takes two forms: with a density peak at the nucleus or with a circular 'hole' around it. Spectral and...
  • Publication
    PHANGS-JWST: Data-processing Pipeline and First Full Public Data Release
    The exquisite angular resolution and sensitivity of JWST are opening a new window for our understanding of the Universe. In nearby galaxies, JWST observations...
  • Publication
    Photometric observations of the warped disks of NGC 4013, NGC 4565 and NGC 6504
    Three spiral galaxies with warped disks have been observed; NGC 4013, NGC 4565, and NGC 6504. There is a clear wavelength dependence in the warp's curve, the...
  • Publication
    Photometric separation of the bulge and disc components of spirals using CCD imaging
    High-resolution CCD images are presented of a sample of spiral galaxies, in infrared photometric bands, obtained at the Cassegrain focus of the 1 m Jacobus...
  • Publication
    Quantifying the ionising flux escaping from the ultra-luminous HII regions in four spiral galaxies
    There are two principal problems in explaining, in terms of the emission from OB stars, the ionisation of the gas which emits the diffuse H-alpha in spiral...
  • Publication
    Real-Colour Images of Spiral Galaxies
    The real-colour images of spiral galaxies reproduced in this Newsletter form part of a new series of such pictures, currently under construction. The original...
  • Talk
    Recovering lenticular galaxies past histories using planetary nebulae kinematics: the case of NGC1023
    We present a detailed study of the lenticular galaxy NGC 1023 kinematics. To perform this analysis we use planetary nebulae (PNe). which can be observed in the...
  • Publication
    Resolving the kinematical structure within the nuclear starburst of NGC 253
    We present high spectral and spatial resolution spectroscopy of the nuclear starburst region of the galaxy NGC 253. Two slit positions, matching the major and...