Publicaciones

  • 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.

    Fecha de publicación:

    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.

    Fecha de publicación:

    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.

    Fecha de publicación:

    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.

    Fecha de publicación:

    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.

    Fecha de publicación:

    10
    2020
  • Detection of Na in WASP-21b's lower and upper atmosphere

    Optical transmission spectroscopy provides crucial constraints on the reference pressure levels and scattering properties for the atmospheres of hot Jupiters. For certain planets, where alkali atoms are detected in the atmosphere, their line profiles could serve as a good probe to link upper and lower atmospheric layers. The planet WASP-21b is a

    Chen, G. et al.

    Fecha de publicación:

    10
    2020