Publicaciones

  • Magnetic Field Diagnostics in the Solar Upper Atmosphere

    The magnetic field is the main driver of the activity in the solar upper atmosphere, but its measurement is notoriously difficult. In order to determine the magnetic field in the chromosphere, transition region, and corona, we need to measure and interpret the polarization signals that the scattering of anisotropic radiation and the Hanle and

    Trujillo Bueno, J. et al.

    Fecha de publicación:

    8
    2022
  • HD 23472: a multi-planetary system with three super-Earths and two potential super-Mercuries

    Context. Comparing the properties of planets orbiting the same host star, and thus formed from the same accretion disc, helps in constraining theories of exoplanet formation and evolution. As a result, the scientific interest in multi-planetary systems is growing with the increasing number of detections of planetary companions. Aims: We report the

    Barros, S. C. C. et al.

    Fecha de publicación:

    9
    2022
  • Low-power jet-interstellar medium interaction in NGC 7319 revealed by JWST/MIRI MRS

    We present JWST/MIRI MRS spectroscopy of NGC 7319, the largest galaxy in the Stephan's Quintet, observed as part of the Early Release Observations (ERO). NGC 7319 hosts a type 2 active galactic nucleus (AGN) and a low-power radio jet (L1.4 GHz = 3.3 × 1022 W Hz−1) with two asymmetric radio hotspots at 430 pc (N2) and 1.5 kpc (S2) projected

    Pereira-Santaella, M. et al.

    Fecha de publicación:

    9
    2022
  • Non-LTE abundance corrections for late-type stars from 2000 Å to 3 µm. I. Na, Mg, and Al

    Context. It is well known that cool star atmospheres depart from local thermodynamic equilibrium (LTE). Making an accurate abundance determination requires taking those effects into account, but the necessary non-LTE (hereafter NLTE) calculations are often lacking. Aims: Our goal is to provide detailed estimates of NLTE effects for FGK type stars

    Lind, K. et al.

    Fecha de publicación:

    9
    2022
  • The IACOB project. VII. The rotational properties of Galactic massive O-type stars revisited

    Context. Stellar rotation is of key importance in the formation process, the evolution, and the final fate of massive stars. Aims: We perform a reassessment of the empirical rotational properties of Galactic massive O-type stars using the results from a detailed analysis of ground-based multi-epoch optical spectra obtained in the framework of the

    Holgado, G. et al.

    Fecha de publicación:

    9
    2022
  • The Tarantula Massive Binary Monitoring. VI. Characterisation of hidden companions in 51 single-lined O-type binaries: A flat mass-ratio distribution and black-hole binary candidates

    Context. Massive binaries hosting a black hole (OB+BH) represent a critical phase in the production of BH mergers in the context of binary evolution. In spite of this, such systems have so far largely avoided detection. Single-lined spectroscopic (SB1) O-type binaries are ideal objects to search for elusive BH companions. Moreover, SB1 binaries

    Shenar, T. et al.

    Fecha de publicación:

    9
    2022