On planet formation in HL Tau

Giovanni Dipierro, Daniel James Price, Guillaume Laibe, Kieran Alexander Hirsh, Alice Cerioli, Giuseppe Lodato

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We explain the axisymmetric gaps seen in recent long-baseline observations of the HL Tau protoplanetary disc with the Atacama Large Millimetre/Submillimetre Array (ALMA) as being due to the different response of gas and dust to embedded planets in protoplanetary discs. We perform global, three-dimensional dusty smoothed particle hydrodynamics calculations of multiple planets embedded in dust/gas discs which successfully reproduce most of the structures seen in the ALMA image. We find a best match to the observations using three embedded planets with masses of 0.2, 0.27 and 0.55 MJ in the three main gaps observed by ALMA, though there remain uncertainties in the exact planet masses from the disc model.
Original languageEnglish
Pages (from-to)73-77
Number of pages5
JournalMonthly Notices of the Royal Astronomical Society: Letters
Issue number1
Publication statusPublished - 2015


  • planet-disc interactions
  • protoplanetary discs
  • dust, extinction
  • submillimetre: planetary systems

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