• Publication
    ALMA Reveals Potential Evidence for Spiral Arms, Bars, and Rings in High-redshift Submillimeter Galaxies
    We present subkiloparsec-scale mapping of the 870 μm ALMA continuum emission in six luminous (L IR ∼ 5 × 1012 L ⊙) submillimeter galaxies (SMGs) from the ALESS...
  • Publication
    Alone on a wide wide sea. The origin of SECCO 1, an isolated star-forming gas cloud in the Virgo cluster*†‡
    SECCO 1 is an extremely dark, low-mass (M⋆ ≃ 105 M⊙), star-forming stellar system lying in the low-velocity cloud (LVC) substructure of the Virgo cluster of...
  • Publication
    Alpha element abundances and gradients in the Milky Way bulge from FLAMES-GIRAFFE spectra of 650 K giants
    Aims: We present the analysis of the [α/Fe] abundance ratios for a large number of stars at several locations in the Milky Way bulge with the aim of...
  • Publication
    Alpha-element abundance patterns in star-forming regions of the Local Universe
    Aims. We have undertaken a reassessment of the distribution of the alpha-element abundance ratios Ne/O, S/O, and Ar/O with respect to metallicity in a sample of...
  • Publication
    Alternative ideas in cosmology
    Some remarkable examples of alternative cosmological theories are reviewed here, ranging from a compilation of variations on the Standard Model through the more...
  • Publication
    Alternative Strategies to Solve the Stellar Atmosphere Problem
    At the heart of the computation of model atmospheres there is the so-called Stellar Atmosphere Problem, which consists of the self-consistent solution of the...
  • Publication
    Ambipolar diffusion in the Bifrost code
    Context. Ambipolar diffusion is a physical mechanism related to the drift between charged and neutral particles in a partially ionized plasma that is key to...
  • Publication
    Ambipolar Diffusion in the Lower Solar Atmosphere: Magnetohydrodynamic Simulations of a Sunspot
    Magnetohydrodynamic (MHD) simulations of the solar atmosphere are often performed under the assumption that the plasma is fully ionized. However, in the lower...
  • Publication
    Ambipolar diffusion: Self-similar solutions and MHD code testing. Cylindrical symmetry
    Context. Ambipolar diffusion is a process occurring in partially ionised astrophysical systems that imparts a complicated mathematical and physical nature to...