Astrophysical: Photometry

  • Publication
    On the Extended Structure of the Phoenix Dwarf Galaxy
    We present the star formation history (SFH) and its variations with galactocentric distance for the Local Group dwarf galaxy of Phoenix. They have been derived...
  • Publication
    On the observational diagnostics to separate classical and disk-like bulges
    Flattened bulges with disk-like properties are considered to be the end product of secular evolution processes at work in the inner regions of galaxies. On the...
  • Publication
    On the relation between the intensities of bright features and the local background in sunspot umbrae
    A photometric study of umbral bright features (umbral dots, clusters of umbral dots, bright grains of light bridges) in sunspots is presented. It is based on...
  • Publication
    On the Reliability of Microvariability Tests in Quasars
    Microvariations probe the physics and internal structure of quasars. Unpredictability and small flux variations make this phenomenon elusive and difficult to...
  • Publication
    On the width distribution of penumbral filaments in sunspots
    The width distribution of the penumbral filaments is estimated using white light photographs obtained with a vacuum, Newtonian type telescope. Observations were...
  • Publication
    Opposition Observations of 162173 Ryugu: Normal Albedo Map Highlights Variations in Regolith Characteristics
    On 2019 January 8, the Telescopic Optical Navigation Camera (ONC-T) on board the Hayabusa2 spacecraft observed the Cb-type asteroid 162173 Ryugu under near...
  • Talk
    Optical and near-infrared day-side emission from exoplanets
    Observations of the secondary eclipse of an exoplanet, the moment the planet moves behind its star, allow us measure the radiation emitted by the exoplanet...
  • Publication
    Optical Imaging of 57 spiral galaxies (Knapen+ 2004)
    All B, R, I and Hα images described in the paper are presented electronically, along with the Ks images from Paper I (Knapen et al., 2003MNRAS.344..527K). The...
  • Publication
    Optical Imaging of Very Luminous Infrared Galaxy Systems: Photometric Properties and Late Evolution
    A sample of 19 low-redshift (0.03