Astrophysical disks

Astrophysical disks are rotationally-supported disks of gas and dust. They are found in a range of astrophysical objects, from small protoplanetary systems and accreting X-ray binaries, to massive disks surrounding actively accreting supermassive black holes in the centre of galaxies. They emit electromagnetic radiation at a range of wavelengths depending on their specific interactions with their parent bodies and surroundings.

Latest Research and Reviews

  • Research |

    Emission from the 1.3-millimetre hydrogen recombination line reveals a rotating disk of cool gas 0.004 parsecs in radius around the supermassive black hole at the centre of our Galaxy.

    • Elena M. Murchikova
    • , E. Sterl Phinney
    • , Anna Pancoast
    •  & Roger D. Blandford
    Nature 570, 83-86
  • Research |

    Two Hα emission peaks are detected within the disk of the T Tauri star PDS 70: one corresponds to protoplanet PDS 70 b, and the other is associated with a second accreting planet of few Jupiter masses at ~35 au. The two protoplanets are near 2:1 mean motion resonance, supporting migration scenarios of giant planets during planetary formation.

    • S. Y. Haffert
    • , A. J. Bohn
    • , J. de Boer
    • , I. A. G. Snellen
    • , J. Brinchmann
    • , J. H. Girard
    • , C. U. Keller
    •  & R. Bacon
  • Reviews |

    This article reviews radio emission mechanisms in radio-quiet active galactic nuclei (AGNs), from star formation and AGN winds, to free-free emission from photoionized gas and AGN disk coronal activity. These mechanisms can be probed by sensitive radio observatories.

    • Francesca Panessa
    • , Ranieri Diego Baldi
    • , Ari Laor
    • , Paolo Padovani
    • , Ehud Behar
    •  & Ian McHardy
    Nature Astronomy 3, 387-396
  • Research |

    ALMA observations of well-studied quadruple stellar system HD 98800 have revealed the presence of a circumbinary disk in a polar orientation around one of the binary pairs, providing observational confirmation of the theoretical stability of such an arrangement.

    • Grant M. Kennedy
    • , Luca Matrà
    • , Stefano Facchini
    • , Julien Milli
    • , Olja Panić
    • , Daniel Price
    • , David J. Wilner
    • , Mark C. Wyatt
    •  & Ben M. Yelverton
    Nature Astronomy 3, 230-235

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