Publications

  • The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxies

    Cold dark matter (CDM) simulations predict a central cusp in the mass distribution of galaxies. This prediction is in stark contrast with observations of dwarf galaxies that show a central plateau or "core" in their density distribution. The proposed solutions to this core-cusp problem can be classified into two types. One invokes feedback

    Sánchez Almeida, Jorge et al.

    Advertised on:

    10
    2020
  • A common explanation of the Hubble tension and anomalous cold spots in the CMB

    The standard cosmological paradigm narrates a reassuring story of a universe currently dominated by an enigmatic dark energy component. Disquietingly, its universal explaining power has recently been challenged by, above all, the ∼4σ tension in the values of the Hubble constant. Another, less studied anomaly is the repeated observation of

    Kovács, A. et al.

    Advertised on:

    9
    2020
  • The post-common-envelope binary central star of the planetary nebula ETHOS 1

    We present a detailed study of the binary central star of the planetary nebula ETHOS 1 (PN G068.1+11.0). Simultaneous modelling of light and radial velocity curves reveals the binary to comprise a hot and massive pre-white dwarf with an M-type main-sequence companion. A good fit to the observations was found with a companion that follows expected

    Munday, James et al.

    Advertised on:

    9
    2020
  • "Observations" of simulated dwarf galaxies. Star-formation histories from color-magnitude diagrams

    Context. Apparent deviations between properties of dwarf galaxies from observations and simulations are known to exist, such as the "Missing Dwarfs" problem, the too-big-to-fail problem, and the cusp-core problem, to name a few. Recent studies have shown that these issues can at least be partially resolved by taking into account the systematic

    Rathi, Shivangee et al.

    Advertised on:

    10
    2020
  • A super-Earth and a sub-Neptune orbiting the bright, quiet M3 dwarf TOI-1266

    We report the discovery and characterisation of a super-Earth and a sub-Neptune transiting the bright (K = 8.8), quiet, and nearby (37 pc) M3V dwarf TOI-1266. We validate the planetary nature of TOI-1266 b and c using four sectors of TESS photometry and data from the newly-commissioned 1-m SAINT-EX telescope located in San Pedro Mártir (México). We

    Demory, B. -O. et al.

    Advertised on:

    10
    2020
  • Cool stars in the Galactic center as seen by APOGEE. M giants, AGB stars, and supergiant stars and candidates

    The Galactic center region, including the nuclear disk, has until recently been largely avoided in chemical census studies because of extreme extinction and stellar crowding. Large, near-IR spectroscopic surveys, such as the Apache Point Observatory Galactic Evolution Experiment (APOGEE), allow the measurement of metallicities in the inner region

    Schultheis, M. et al.

    Advertised on:

    10
    2020