Astrophysical: Techniques

  • Publication
    Chemical composition of the young massive cluster NGC 1569-B
    Context. The chemical composition of young massive clusters (YMCs) provides stellar population information on their host galaxy. As potential precursors of...
  • Publication
    Chemical Compositions of Field and Globular Cluster RR Lyrae Stars. I. NGC 3201
    We present a detailed spectroscopic analysis of horizontal branch stars in the globular cluster NGC 3201. We collected optical (4580–5330 Å), high-resolution (...
  • Publication
    Chemical Compositions of Field and Globular Cluster RR Lyrae Stars. II. ω Centauri
    We present a detailed spectroscopic analysis of RR Lyrae (RRL) variables in the globular cluster NGC 5139 (ω Cen). We collected optical (4580–5330 Å), high...
  • Publication
    CHEOPS and TESS view of the ultra-short-period super-Earth TOI-561 b
    Context. Ultra-short-period planets (USPs) are a unique class of super-Earths with an orbital period of less than a day, and hence they are subject to intense...
  • Publication
    CHEOPS geometric albedo of the hot Jupiter HD 209458 b
    We report the detection of the secondary eclipse of the hot Jupiter HD 209458 b in optical/visible light using the CHEOPS space telescope. Our measurement of 20...
  • Publication
    CHEOPS in-flight performance. A comprehensive look at the first 3.5 yr of operations
    Context. Since the discovery of the first exoplanet almost three decades ago, the number of known exoplanets has increased dramatically. By beginning of the...
  • Publication
    CHEOPS observations of KELT-20 b/MASCARA-2 b: An aligned orbit and signs of variability from a reflective day side
    Context. Occultations are windows of opportunity to indirectly peek into the dayside atmosphere of exoplanets. High-precision transit events provide information...
  • Publication
    CHEOPS precision phase curve of the Super-Earth 55 Cancri e
    Context. 55 Cnc e is a transiting super-Earth (radius 1.88 R ⊕ and mass 8 M ⊕) orbiting a G8V host star on a 17-h orbit. Spitzer observations of the planet's...
  • Publication
    Chromospheric polarimetry through multiline observations of the 850 nm spectral region III: Chromospheric jets driven by twisted magnetic fields
    We investigate the diagnostic potential of the spectral lines at 850 nm for understanding the magnetism of the lower atmosphere. For that purpose, we use a...