Astrofísicas: Universo temprano

  • Publicación
    Improving constraints on primordial non-Gaussianity from Quaia with a new cosmological observable: Angular redshift fluctuations
    Context. Angular redshift fluctuations (ARFs) are a new cosmological observable recently proposed in the literature. It measures the 2D angular deviations of...
  • Publicación
    Intervening nuclear obscuration changing the X-ray look of the z ≈ 6 quasi-stellar object CFHQS J164121+375520
    X-ray observations of the optically selected z = 6.025 quasi-stellar object (QSO) CFHQS J164121+375520 (hereafter J1641) revealed that its flux dropped by a...
  • Publicación
    Is the Bremer Deep Field reionized, at z ∼ 7?
    We show herein that the population of star-forming galaxies in the Bremer Deep Field (BDF) has enough ionizing power to form two large ionized bubbles that...
  • Publicación
    JWST Constraints on the UV Luminosity Density at Cosmic Dawn: Implications for 21 cm Cosmology
    An unprecedented array of new observational capabilities are starting to yield key constraints on models of the epoch of first light in the Universe. In this...
  • Noticia
    La arqueología extragaláctica revela nuevas pistas sobre la formación de las galaxias
    Un trabajo de revisión internacional, en el que participa el investigador del IAC Jesús Falcón-Barroso, explica cómo el estudio de las poblaciones estelares en...
  • Publicación
    Large Scale Absorbers in the Environment of High-z Radio-Galaxies
    We discuss a number of interesting questions that arise from studies of extended absorbers observed in high redshift radio-galaxies. We propose to carry out 2-D...
  • Charla
    Let there be light: galaxy formation for the novice
    The origin of the galaxies represents an important focus of current cosmological research, both observational and theoretical. Its resolution involves a...
  • Publicación
    Lines in the cosmic microwave background spectrum from the epoch of cosmological helium recombination
    The main goal of this work is to calculate the contributions of bound-bound transitions of helium to the cosmological recombination spectrum. We show that...
  • Publicación
    Lines in the cosmic microwave background spectrum from the epoch of cosmological hydrogen recombination
    We compute the spectral distortions of the cosmic microwave background (CMB) arising during the epoch of cosmological hydrogen recombination within the standard...