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Hace 3 días · And at the other end of the mass scale, Euclid will also observe entire groups of galaxies, like the cluster Abell 2390, which contains more than 50,000 galaxies. Such clusters are so massive that ...
Hace 2 días · The cosmic microwave background ( CMB or CMBR) is microwave radiation that fills all space in the observable universe. It is a remnant that provides an important source of data on the primordial universe. [1] With a standard optical telescope, the background space between stars and galaxies is almost completely dark.
Hace 5 días · Age of massive galaxies at redshift 8. Recent James Webb Space Telescope (JWST) data analyses have shown that massive red galaxies existed at redshifts z > 6, a discovery that is difficult to understand in the context of standard cosmology ( Λ CDM).
Hace 5 días · Recent advancements in galaxy surveys have revolutionized our understanding of the universe, revealing intricate details about dark matter, dark energy, and the large-scale cosmic web. Utilizing cutting-edge technologies and machine learning, these surveys provide critical insights into the evolution and structure of the cosmos, shaping the future of astronomical exploration.
Hace 3 días · Title: Active Galactic Nuclei and Host Galaxies in COSMOS-Web. II. First Look at the Kpc-scale Dual and Offset AGN Population Authors: Junyao Li , Ming-Yang Zhuang , Yue Shen , Marta Volonteri , Nianyi Chen , Tiziana Di Matteo
Hace 5 días · This result conflicts with the inferred ages of these galaxies, however, which were on average between 0.9 and 2.4 Gyr old within 95% CL. Given the sequence of star formation and galaxy assembly in the standard model, these galaxies should instead be even younger than 290 Myr on average, for which our analysis assigns a probability of only $<3\times 10^{-4}$ ($\gtrsim 3.6\sigma $ tension).
Hace 1 día · The recent evidence of energetic gravitational waves as observed by the LIGO interferometer experiment requires reevaluation of related theories over the past century. Here we examine the context of that formative research and reframe their conclusions using 21st century data. Through sincere application of mainstream mathematics, we demonstrate a linear and sustained redshift trend that ...
