Cosmology

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.

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Latest Research and Reviews

  • Research |

    Studies of the planetary nebula NGC 7027, using an upgraded spectrometer onboard a high-altitude observatory, have identified the rotational ground-state transition of the helium hydride ion—the first molecule to form after the Big Bang and an essential precursor to molecular hydrogen.

    • Rolf Güsten
    • , Helmut Wiesemeyer
    • , David Neufeld
    • , Karl M. Menten
    • , Urs U. Graf
    • , Karl Jacobs
    • , Bernd Klein
    • , Oliver Ricken
    • , Christophe Risacher
    •  & Jürgen Stutzki
    Nature 568, 357-359
  • Research |

    The abundance of primordial black holes in the Galactic halo is constrained through their microlensing of stars in M31. Despite monitoring tens of millions of stars, only a single candidate event is found, providing stringent upper bounds on their abundance.

    • Hiroko Niikura
    • , Masahiro Takada
    • , Naoki Yasuda
    • , Robert H. Lupton
    • , Takahiro Sumi
    • , Surhud More
    • , Toshiki Kurita
    • , Sunao Sugiyama
    • , Anupreeta More
    • , Masamune Oguri
    •  & Masashi Chiba
  • Research |

    In the early Universe, fluctuations in the neutrino density produced a distinct shift in the temporal phase of sound waves in the primordial plasma. The size of this phase shift has now been constrained through baryon acoustic oscillation data.

    • Daniel Baumann
    • , Florian Beutler
    • , Raphael Flauger
    • , Daniel Green
    • , Anže Slosar
    • , Mariana Vargas-Magaña
    • , Benjamin Wallisch
    •  & Christophe Yèche
    Nature Physics 15, 465-469
  • Research |

    Simulations of early galaxy formation suggest that the dynamics of structure formation, rather than the Lyman–Werner flux, drives the formation of massive black holes in the early Universe.

    • John H. Wise
    • , John A. Regan
    • , Brian W. O’Shea
    • , Michael L. Norman
    • , Turlough P. Downes
    •  & Hao Xu
    Nature 566, 85-88

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