Astrophysical: Early universe

  • Publication
    Galaxies at z>7: Probing galaxy formation with the new generation of NIR Instruments
    We present the results obtained from our deep survey of lensing clusters aimed at constraining the abundance of star-forming galaxies at z ˜ 6-11. Lensing...
  • Publication
    Gran Telescopio Canarias observations of an overdense region of Lyman α emitters at z = 6.5
    We present the results of our search near the end of the Reionization Epoch for faint galaxies. This has been done using very deep OSIRIS images obtained at the...
  • Publication
    GRB 050904 at redshift 6.3: observations of the oldest cosmic explosion after the Big Bang
    We present optical and near-infrared observations of the afterglow of the gamma-ray burst GRB 050904. We derive a photometric redshift z = 6.3, estimated from...
  • Publication
    GRB 080913 at Redshift 6.7
    We report on the detection by Swift of GRB 080913, and subsequent optical/near-infrared follow-up observations by GROND, which led to the discovery of its...
  • Publication
    High z Radio-Loud and Radio-Quiet QSO Environments
    We propose a systematic study of the environments of a representative sample of Radio Loud Quasars (RLQ) and Radio Quiet Quasars (RQQ) in two different redshift...
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    High-redshift lensed galaxies
    We present the results obtained from our deep survey of lensing clusters aimed at constraining the abundance of star-forming galaxies at z˜6 11.
  • Publication
    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...
  • Publication
    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...
  • Publication
    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...