Astrophysical: Galaxies

  • Publication
    Testing supernovae Ia distance measurement methods with SN 2011fe
    Aims: The nearby, bright, almost completely unreddened Type Ia supernova 2011fe in M101 provides a unique opportunity to test both the precision and the...
  • Publication
    Testing Tests on Active Galactic Nucleus Microvariability
    Literature on optical and infrared microvariability in active galactic nuclei (AGNs) reflects a diversity of statistical tests and strategies to detect tiny...
  • Publication
    Testing the quenching subgrid physics in Green Valley galaxies
    In the title of this Symposium: "The rise and fall of star formation in galaxies", the "falling" stage is mostly represented by so-called Green Valley galaxies...
  • Publication
    Testing the role of AGN on the star formation and metal enrichment of 'twin galaxies'
    We explore the effect of AGN activity on the star formation history of galaxies by analysing the stellar population properties of 10 pairs of nearby twin...
  • Publication
    Testing the Unification Model for Active Galactic Nuclei in the Infrared: Are the Obscuring Tori of Type 1 and 2 Seyferts Different?
    We present new mid-infrared imaging data for three Type-1 Seyfert galaxies obtained with T-ReCS on the Gemini-South Telescope at subarcsecond resolution. Our...
  • Publication
    Testing the Wavelength Dependence of Cosmological Redshift Down to Δz ∼ 10‑6
    At the core of the standard cosmological model lies the assumption that the redshift of distant galaxies is independent of photon wavelength. This invariance of...
  • Publication
    Testing two-component models on very high-energy gamma-ray-emitting BL Lac objects
    Context. It has become evident that one-zone synchrotron self-Compton models are not always adequate for very high-energy (VHE) gamma-ray-emitting blazars...
  • Publication
    Tests of model predictions for the responses of stellar spectra and absorption-line indices to element abundance variations
    A method that is widely used to analyse stellar populations in galaxies is to apply the theoretically derived responses of stellar spectra and line indices to...
  • Publication
    TeV pion bumps in the gamma-ray spectra of flaring blazars
    Context. Very high-energy (VHE, E > 100 GeV) observations of the blazar Mrk 501 with MAGIC in 2014 provided evidence for an unusual narrow spectral feature at...