A planetesimal orbiting within the debris disc around a white dwarf star. Journal Article uri icon



  • 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.

publication date

  • April 5, 2019

has restriction

  • bronze

Date in CU Experts

  • February 21, 2022 2:08 AM

Full Author List

  • Manser CJ; Gänsicke BT; Eggl S; Hollands M; Izquierdo P; Koester D; Landstreet JD; Lyra W; Marsh TR; Meru F

author count

  • 32

Other Profiles

Electronic International Standard Serial Number (EISSN)

  • 1095-9203

Additional Document Info

start page

  • 66

end page

  • 69


  • 364


  • 6435