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

Journal
Date Issued
2019
Author(s)
Manser, Christopher J.
•
Gänsicke, Boris T.
•
Eggl, Siegfried
•
Hollands, Mark
•
Izquierdo, Paula
•
Koester, Detlev
•
Landstreet, John D.
•
Lyra, Wladimir
•
Marsh, Thomas R.
•
Meru, Farzana
•
Mustill, Alexander J.
•
Rodríguez-Gil, Pablo
•
Toloza, Odette
•
Veras, Dimitri
•
Wilson, David J.
•
Burleigh, Matthew R.
•
Davies, Melvyn B.
•
Farihi, Jay
•
Gentile Fusillo, Nicola
•
•
Parsons, Steven G.
•
Quirrenbach, Andreas
•
Raddi, Roberto
•
Reffert, Sabine
•
•
Schreiber, Matthias R.
•
•
Toonen, Silvia
•
Villaver, Eva
•
Wyatt, Mark
•
Xu, Siyi
•
Portegies Zwart, Simon
DOI
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.
Volume
364
Issue
6435
Start page
66
Uri
Url
Issn Identifier
0036-8075
Ads BibCode
2019Sci...364...66M
Rights
open.access
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