Publications

  • A stellar stream remnant of a globular cluster below the metallicity floor

    Stellar ejecta gradually enrich the gas out of which subsequent stars form, making the least chemically enriched stellar systems direct fossils of structures formed in the early Universe1. Although a few hundred stars with metal content below 1,000th of the solar iron content are known in the Galaxy2-4, none of them inhabit globular clusters, some

    Martin, Nicolas F. et al.

    Advertised on:

    1
    2022
  • Abundance Analysis of the J4 Equatorial Knot of the Born-again Planetary Nebula A30

    A30 belongs to a class of planetary nebulae identified as "born-again", containing dense, hydrogen-poor ejecta with extreme abundance discrepancy factors (ADFs), likely associated with a central binary system. We present intermediate-dispersion spectroscopy of one such feature-the J4 equatorial knot. We confirm the apparent physical and chemical

    Simpson, Jordan et al.

    Advertised on:

    1
    2022
  • Dark Energy Survey Year 3 Results: Measuring the Survey Transfer Function with Balrog

    We describe an updated calibration and diagnostic framework, Balrog, used to directly sample the selection and photometric biases of the Dark Energy Survey (DES) Year 3 (Y3) data set. We systematically inject onto the single-epoch images of a random 20% subset of the DES footprint an ensemble of nearly 30 million realistic galaxy models derived

    Everett, S. et al.

    Advertised on:

    1
    2022
  • Detection of the tidal deformation of WASP-103b at 3 σ with CHEOPS

    Context. Ultra-short period planets undergo strong tidal interactions with their host star which lead to planet deformation and orbital tidal decay. Aims: WASP-103b is the exoplanet with the highest expected deformation signature in its transit light curve and one of the shortest expected spiral-in times. Measuring the tidal deformation of the

    Barros, S. C. C. et al.

    Advertised on:

    1
    2022
  • Gaia early DR3 systemic motions of Local Group dwarf galaxies and orbital properties with a massive Large Magellanic Cloud

    Aims: We perform a comprehensive determination of the systemic proper motions of 74 dwarf galaxies and dwarf galaxy candidates in the Local Group based on Gaia early data release 3. The outputs of the analysis for each galaxy, including probabilities of membership, will be made publicly available. The analysis is augmented by a determination of the

    Battaglia, G. et al.

    Advertised on:

    1
    2022