A planetesimal orbiting within the debris disc around a white dwarf star.
Science
; 364(6435): 66-69, 2019 04 05.
Article
en En
| MEDLINE
| ID: mdl-30948547
ABSTRACT
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.
Texto completo:
1
Bases de datos:
MEDLINE
Idioma:
En
Revista:
Science
Año:
2019
Tipo del documento:
Article
País de afiliación:
Reino Unido