Astrofísicas: Cosmología

  • Publicación
    Ks Number Counts in the Groth and Coppi Fields
    We have used William Herschel Telescope/INGRID Ks images on two high-latitude fields, the Coppi and Groth strips, to obtain galaxy number counts over ~180...
  • Publicación
    K[s] number counts in the Groth and Coppi fields
    The COSMOS Survey is currently mapping 0.5 deg2 of sky in optical and near-IR bands to definesamples of compact galaxies at high redshift for spectroscopic...
  • Blog
    La hoguera vanidosa
    El Big Bang era un estúpido. Se creía una gran explosión y presumía de que nadie en el Universo le superaba en magnitud. Vanidoso sin límite, sus alardes le...
  • 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...
  • Publicación
    Large SDSS Quasar Groups and their Statistical Significance
    We use a volume-limited sample of quasars in the Sloan Digital Sky Survey (SDSS) DR7 quasar catalog to identify quasar groups and address their statistical...
  • Publicación
    Lensed Type Ia Supernova "Encore" at z = 2: The First Instance of Two Multiply Imaged Supernovae in the Same Host Galaxy
    A bright (m F150W,AB = 24 mag), z = 1.95 supernova (SN) candidate was discovered in JWST/NIRCam imaging acquired on 2023 November 17. The SN is quintuply imaged...
  • Publicación
    Lensing without borders - I. A blind comparison of the amplitude of galaxy-galaxy lensing between independent imaging surveys
    Lensing without borders is a cross-survey collaboration created to assess the consistency of galaxy-galaxy lensing signals (ΔΣ) across different data sets and...
  • Publicación
    LensWatch. II. Improved Photometry and Time-delay Constraints on the Strongly Lensed Type Ia Supernova 2022qmx ("SN Zwicky") with Hubble Space Telescope Template Observations
    Strongly lensed supernovae (SNe) are a rare class of transient that can offer tight cosmological constraints that are complementary to methods from other...
  • Publicación
    Limiting the Abundance of LIGO/Virgo Black Holes with Microlensing Observations of Quasars of Finite Size
    We present a simple but general argument that strongly limits the abundance of primordial black holes (PBHs) (or other unknown population of compact objects)...