Publicaciones

  • EL FORMALISMO PERTURBATIVO EN LA EVOLUCION NO LINEAL DE ESTRUCTURAS COSMOLOGICAS.

    Hay dos formalismos para el estudio de la evolución de estructuras a gran escala desde un punto de vista analítico: el Lagrangiano y el Euleriano. Los buenos resultados dados por el primero y lo farragoso de la presentación usual del segundo han hecho que este último haya recibido escasa atención. En este trabajo se muestra una presentación más

    Alvaro Pérez Raposo

    Fecha de publicación:

    1
    1999
  • Spectroscopic characterization of the known O-star population in Cygnus OB2. Evidence of multiple star-forming bursts

    Context. Cygnus OB2 provides a unique insight into the high-mass stellar content in one of the largest groups of young massive stars in our Galaxy. Although several studies of its massive population have been carried out over the last decades, an extensive spectroscopic study of the whole known O-star population in the association is still lacking

    Berlanas, S. R. et al.

    Fecha de publicación:

    10
    2020
  • A giant planet candidate transiting a white dwarf

    Astronomers have discovered thousands of planets outside the Solar System1, most of which orbit stars that will eventually evolve into red giants and then into white dwarfs. During the red giant phase, any close-orbiting planets will be engulfed by the star2, but more distant planets can survive this phase and remain in orbit around the white

    Vanderburg, Andrew et al.

    Fecha de publicación:

    9
    2020
  • A quantitative demonstration that stellar feedback locally regulates galaxy growth

    We have applied stellar population synthesis to 500-pc-sized regions in a sample of 102 galaxy discs observed with the MUSE spectrograph. We derived the star formation history and analyse specifically the 'recent' ( $20\,\rm {Myr}$ ) and 'past' ( $570\,\rm {Myr}$ ) age bins. Using a star formation self-regulator model, we can derive local mass

    Zaragoza-Cardiel, Javier et al.

    Fecha de publicación:

    9
    2020
  • How many components? Quantifying the complexity of the metallicity distribution in the Milky Way bulge with APOGEE

    We use data of ∼13-=000 stars from the Sloan Digital Sky Survey/Apache Point Observatory Galactic Evolution Experiment survey to study the shape of the bulge metallicity distribution function (MDF) within the region |ℓ| ≤ 11° and |b| ≤ 13°, and spatially constrained to RGC ≤ 3.5 kpc. We apply Gaussian mixture modelling and non-negative matrix

    Rojas-Arriagada, Alvaro et al.

    Fecha de publicación:

    9
    2020
  • NICER observations reveal that the X-ray transient MAXI J1348-630 is a black hole X-ray binary

    We studied the outburst evolution and timing properties of the recently discovered X-ray transient MAXI J1348-630 as observed with NICER. We produced the fundamental diagrams commonly used to trace the spectral evolution, and power density spectra to study the fast X-ray variability. The main outburst evolution of MAXI J1348-630 is similar to that

    Zhang, L. et al.

    Fecha de publicación:

    9
    2020