Astrophysical: Techniques

  • Publication
    Polarization echoes from past nuclear activity in the quasi-periodic eruption source GSN 069
    Context. X-ray quasi-periodic eruptions (QPEs) are repeating, high-amplitude, soft X-ray bursts observed from the nuclei of a dozen nearby low-mass galaxies...
  • Publication
    Polarized Mid-infrared Synchrotron Emission in the Core of Cygnus A
    We present high-angular (~0.''4) resolution mid-infrared (MIR) polarimetric observations in the 8.7 μm and 11.6 μm filters of Cygnus A using CanariCam on the 10...
  • Publication
    POLIS: A spectropolarimeter for the VTT and for GREGOR
    The polarimetric Littrow Spectrograph POLIS is designed for vector polarimetry at high angular and spectral resolution. It measures the magnetic field...
  • Publication
    Possible detection of a bimodal cloud distribution in the atmosphere of HAT-P-32 A b from multiband photometry
    We present high-precision photometry of eight separate transit events in the HAT-P-32 planetary system. One transit event was observed simultaneously by two...
  • Publication
    Possible detection of phase changes from the non-transiting planet HD 46375b by CoRoT
    Context. The present work deals with the detection of phase changes in an exoplanetary system. HD 46375 is a solar analog known to host a non-transiting Saturn...
  • Publication
    Possible ring material around centaur (2060) Chiron
    We propose that several short-duration events observed in past stellar occultations by Chiron were produced by ring material. Some similarities between these...
  • Publication
    Post maximum light and late time optical imaging polarimetry of type I superluminous supernova 2020znr
    Optical imaging polarimetry was conducted on the hydrogen poor superluminous supernova 2020znr during three phases after maximum light (≍ +34 d, +288 d, and...
  • Publication
    Powerful mechanical-driven outflows in the central parsecs of the low-luminosity active galactic nucleus ESO 428-G14
    Low-luminosity Active Galactic Nuclei (LLAGNs) are characterized for low-radiative efficiency, much less than one percent of their Eddington limit. Nevertheless...
  • Publication
    Pre-main sequence spectroscopic binaries suitable for VLTI observations
    Context: A severe problem for research in star-formation is that the masses of young stars are almost always estimated from evolutionary tracks alone. Since the...