Publicaciones

  • Obliquity measurement and atmospheric characterisation of the WASP-74 planetary system

    We present new transit observations of the hot Jupiter WASP-74 b (Teq ~ 1860 K) using the high-resolution spectrograph HARPS-N and the multi-colour simultaneous imager MuSCAT2. We refined the orbital properties of the planet and its host star and measured its obliquity for the first time. The measured sky-projected angle between the stellar spin

    Luque, R. et al.

    Fecha de publicación:

    10
    2020
  • The Gaia-ESO Survey: A new diagnostic for accretion and outflow activity in the young cluster NGC 2264

    Context. NGC 2264 is a young cluster whose accretion properties can be investigated in detail by taking advantage of the FLAMES data in the context of the Gaia-ESO Survey. In fact, the analysis of the Hα emission line profile can provide us with information about the accretion and ejection activity of young stars. However, a strong nebular emission

    Bonito, R. et al.

    Fecha de publicación:

    10
    2020
  • The GALAH Survey: non-LTE departure coefficients for large spectroscopic surveys

    Massive sets of stellar spectroscopic observations are rapidly becoming available and these can be used to determine the chemical composition and evolution of the Galaxy with unprecedented precision. One of the major challenges in this endeavour involves constructing realistic models of stellar spectra with which to reliably determine stellar

    Amarsi, A. M. et al.

    Fecha de publicación:

    10
    2020
  • Ubiquitous hundred-Gauss magnetic fields in solar spicules

    Aims: We aim to study the magnetic field in solar spicules using high-resolution spectropolarimetric observations in the Ca II 8542 Å line obtained with the Swedish 1-m Solar Telescope. Methods: The equations that result from the application of the weak field approximation (WFA) to the radiative transfer equations were used to infer the line-of

    Kriginsky, M. et al.

    Fecha de publicación:

    10
    2020
  • Simulations Predicting the Ability of Multi-color Simultaneous Photometry to Distinguish TESS Candidate Exoplanets from False Positives

    The Transiting Exoplanet Survey Satellite (TESS) is currently concluding its 2 yr primary science mission searching 85% of the sky for transiting exoplanets. TESS has already discovered well over one thousand TESS objects of interest (TOIs), but these candidate exoplanets must be distinguished from astrophysical false positives using other

    Louie, Dana R. et al.

    Fecha de publicación:

    8
    2020
  • The TOI-763 system: sub-Neptunes orbiting a Sun-like star

    We report the discovery of a planetary system orbiting TOI-763(aka CD-39 7945), a V = 10.2, high proper motion G-type dwarf star that was photometrically monitored by the TESS space mission in Sector 10. We obtain and model the stellar spectrum and find an object slightly smaller than the Sun, and somewhat older, but with a similar metallicity. Two

    Fridlund, M. et al.

    Fecha de publicación:

    8
    2020