Cosmology

Definition

Cosmology is the study of the universe; its birth, evolution, and ultimate fate. This includes further developing and refining the prevailing model, the Big Bang theory, investigating the universe’s rate of expansion, and measuring radiation left over from the Big Bang, the so-called cosmic microwave background.

Latest Research and Reviews

  • Research |

    When the Universe was just 3 billion years old, half of the most massive galaxies had already ceased star formation, and such a galaxy has now been observed using gravitational lensing, unexpectedly turning out to be a compact, fast-spinning disk galaxy rather than a proto-bulge galaxy.

    • Sune Toft
    • , Johannes Zabl
    • , Johan Richard
    • , Anna Gallazzi
    • , Stefano Zibetti
    • , Moire Prescott
    • , Claudio Grillo
    • , Allison W. S. Man
    • , Nicholas Y. Lee
    • , Carlos Gómez-Guijarro
    • , Mikkel Stockmann
    • , Georgios Magdis
    •  & Charles L. Steinhardt
    Nature 546, 510–513
  • Research |

    The brightest galaxy in a cluster is known to align with its host filament in the local Universe. Here this correlation is extended to when the Universe was just a third of its current age. With this, the privileged history of brightest cluster galaxies is reinforced.

    • Michael J. West
    • , Roberto De Propris
    • , Malcolm N. Bremer
    •  & Steven Phillipps
  • Research |

    Coevolving millions of cold dark matter particles and neutrinos within one N-body simulation, TianNu, shows that regions of similar dark matter density can have different neutrino densities. These density variations may have an effect on the cosmic structure.

    • Hao-Ran Yu
    • , J.D. Emberson
    • , Derek Inman
    • , Tong-Jie Zhang
    • , Ue-Li Pen
    • , Joachim Harnois-Déraps
    • , Shuo Yuan
    • , Huan-Yu Teng
    • , Hong-Ming Zhu
    • , Xuelei Chen
    • , Zhi-Zhong Xing
    • , Yunfei Du
    • , Lilun Zhang
    • , Yutong Lu
    •  & XiangKe Liao
  • Research |

    Four galaxies discovered near quasars at redshifts exceeding 6 have star-formation rates that are high enough to explain the massive elliptical galaxies known to exist at redshifts of about 4.

    • R. Decarli
    • , F. Walter
    • , B. P. Venemans
    • , E. Bañados
    • , F. Bertoldi
    • , C. Carilli
    • , X. Fan
    • , E. P. Farina
    • , C. Mazzucchelli
    • , D. Riechers
    • , H.-W. Rix
    • , M. A. Strauss
    • , R. Wang
    •  & Y. Yang
    Nature 545, 457–461
  • Research |

    A faint galaxy has been detected in the very early Universe thanks to deep observations and a massive cluster gravitationally magnifying its emission. One out of only five such galaxies known, this detection constrains how the Universe was reionized.

    • Austin Hoag
    • , Maruša Bradacˇ
    • , Michele Trenti
    • , Tommaso Treu
    • , Kasper B. Schmidt
    • , Kuang-Han Huang
    • , Brian C. Lemaux
    • , Julie He
    • , Stephanie R. Bernard
    • , Louis E. Abramson
    • , Charlotte A. Mason
    • , Takahiro Morishita
    • , Laura Pentericci
    •  & Tim Schrabback

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