Stars

Stars are large balls of plasma, predominantly hydrogen and helium. The birth, evolution and death of stars are of particular research interest. Other important topics include understanding the internal processes, such as fusion, that generate great quantities of radiation and the gravitational interactions between stars.

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Latest Research and Reviews

  • Research |

    Detections of lithium (and in one case, potassium) in the atmospheres of four old white dwarfs suggest that they have accreted fragments of planets; specifically, planetary crusts. One white dwarf evolved from an intermediate-mass progenitor, indicating that rocky planets form even around short-lived B-type stars.

    • Mark A. Hollands
    • , Pier-Emmanuel Tremblay
    •  & Nicola Pietro Gentile-Fusillo
  • Research |

    Stars in the Tucana II ultrafaint dwarf galaxy observed out to nine half-light radii reveal the presence of an extended dark matter halo with a total mass of >107 solar masses, consistent with a generalized Navarro–Frenk–White density profile and suggestive of past strong bursty feedback or an early galactic merger.

    • Anirudh Chiti
    • , Anna Frebel
    •  & John E. Norris
  • Reviews |

    The factors affecting how and why supernovae occur are discussed, and the current status of core-collapse supernova explosion theory is reviewed.

    • A. Burrows
    •  & D. Vartanyan
    Nature 589, 29-39
  • Research |

    Observations and stellar evolution models of a blue ring nebula and its central star (TYC 2597-735-1) suggest that the remnant star merged with a lower-mass companion several thousand years ago.

    • Keri Hoadley
    • , D. Christopher Martin
    •  & Bradley E. Schaefer
    Nature 587, 387-391

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