A planetesimal orbiting within the debris disc around a white dwarf star

Research output: Contribution to journalArticle


Many white dwarf stars show signs of having accreted smaller bodies, implying that they may host planetary systems. A small number of these systems contain gaseous debris discs, visible through emission lines. We report a stable 123.4-minute periodic variation in the strength and shape of the Ca II emission line profiles originating from the debris disc around the white dwarf SDSS J122859.93+104032.9. We interpret this short-period signal as the signature of a solid-body planetesimal held together by its internal strength.


  • Christopher J. Manser
  • Boris T. Gänsicke
  • Siegfried Eggl
  • Mark Hollands
  • Paula Izquierdo
  • Detlev Koester
  • John D. Landstreet
  • Wladimir Lyra
  • Thomas R. Marsh
  • Farzana Meru
  • Pablo Rodriguez-Gil
  • Odette Toloza
  • Dimitri Veras
  • David J. Wilson
  • Matthew R. Burleigh
  • Jay Farihi
  • Nicola Gentile Fusillo
  • Domitilla de Martino
  • Steven G. Parsons
  • Andreas Quirrenbach
  • Roberto Raddi
  • Sabine Reffert
  • Melania Del Santo
  • Matthias R. Schreiber
  • Roberto Silvotti
  • Silvia Toonen
  • Eva Villaver
  • Mark Wyatt
  • Siyi Xu
  • Simon Portegies Zwart
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Astronomy, Astrophysics and Cosmology


  • Astronomy, Planetary Sciences, Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Solar and Stellar Astrophysics
Original languageEnglish
Pages (from-to)66-69
Number of pages4
Issue number6435
Publication statusPublished - 2019 Apr 1
Publication categoryResearch

Related projects

Alex Mustill

Swedish Research Council


Project: Research

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