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

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.

Metadata

Authors/Creators:	Manser, C.J. https://orcid.org/0000-0003-1543-5405 Gänsicke, B.T. https://orcid.org/0000-0002-2761-3005 Eggl, S. https://orcid.org/0000-0002-1398-6302 Hollands, M. Izquierdo, P. https://orcid.org/0000-0002-0864-9432 Koester, D. https://orcid.org/0000-0002-6164-6978 Landstreet, J.D. https://orcid.org/0000-0001-8218-8542 Lyra, W. https://orcid.org/0000-0002-3768-7542 Marsh, T.R. https://orcid.org/0000-0002-2498-7589 Meru, F. https://orcid.org/0000-0002-3984-9496 Mustill, A.J. https://orcid.org/0000-0002-2086-3642 Rodríguez-Gil, P. https://orcid.org/0000-0002-4717-5102 Toloza, O. Veras, D. https://orcid.org/0000-0001-8014-6162 Wilson, D.J. https://orcid.org/0000-0001-9667-9449 Burleigh, M.R. https://orcid.org/0000-0003-0684-7803 Davies, M.B. https://orcid.org/0000-0001-6080-1190 Farihi, J. https://orcid.org/0000-0003-1748-602X Gentile Fusillo, N. https://orcid.org/0000-0002-6428-4378 de Martino, D. https://orcid.org/0000-0002-5069-4202 Parsons, S.G. https://orcid.org/0000-0002-2695-2654 Quirrenbach, A. Raddi, R. https://orcid.org/0000-0002-9090-9191 Reffert, S. https://orcid.org/0000-0002-0460-8289 Del Santo, M. https://orcid.org/0000-0002-1793-1050 Schreiber, M.R. https://orcid.org/0000-0003-3903-8009 Silvotti, R. https://orcid.org/0000-0002-1295-8174 Toonen, S. https://orcid.org/0000-0002-2998-7940 Villaver, E. https://orcid.org/0000-0003-4936-9418 Wyatt, M. https://orcid.org/0000-0001-9064-5598 Xu, S. https://orcid.org/0000-0002-8808-4282 Portegies Zwart, S. https://orcid.org/0000-0001-5839-0302
Copyright, Publisher and Additional Information:	© 2019 The Authors. This is an author-produced version of a paper subsequently published in Science. Uploaded in accordance with the publisher's self-archiving policy.
Dates:	Accepted: 26 February 2019 Published (online): 5 April 2019 Published: 5 April 2019
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield)
Depositing User:	Symplectic Sheffield
Date Deposited:	17 Apr 2019 09:22
Last Modified:	17 Apr 2019 09:22
Status:	Published
Publisher:	American Association for the Advancement of Science
Refereed:	Yes
Identification Number:	https://doi.org/10.1126/science.aat5330
Related URLs:	PubMed URL

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

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