Options
A planetesimal orbiting within the debris disc around a white dwarf star
Journal
Science
ISSN
1095-9203
Date Issued
2019-04-05
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
Veras, Dimitri
Wilson, David J.
Burleigh, Matthew R.
Davies, Melvyn B.
Farihi, Jay
Fusillo, Nicola Gentile
de Martino, Domitilla
Parsons, Steven G.
Quirrenbach, Andreas
Raddi, Roberto
Reffert, Sabine
Santo, Melania Del
Schreiber, Matthias R.
Silvotti, Roberto
Toonen, Silvia
Villaver, Eva
Wyatt, Mark
Xu, Siyi
Zwart, Simon Portegies
Abstract
<jats:title>A low-mass planet around a white dwarf</jats:title>
<jats:p>
Numerous exoplanets have been detected around Sun-like stars. These stars end their lives as white dwarfs, which should inherit any surviving planetary systems. Manser
<jats:italic>et al.</jats:italic>
found periodic shifts in emission lines from a disc of gas orbiting around a white dwarf (see the Perspective by Fossati). They used numerical simulations to show that the most likely explanation for the spectral shifts is a low-mass planet orbiting within the disc. The planet must be unusually small and dense to avoid being ripped apart by tidal forces. The authors speculate that it may be the leftover core of a planet whose outer layers have been removed.
</jats:p>
<jats:p>
<jats:italic>Science</jats:italic>
, this issue p.
<jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6435" page="66" related-article-type="in-this-issue" vol="364" xlink:href="10.1126/science.aat5330">66</jats:related-article>
; see also p.
<jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6435" page="25" related-article-type="in-this-issue" vol="364" xlink:href="10.1126/science.aax0051">25</jats:related-article>
</jats:p>
<jats:p>
Numerous exoplanets have been detected around Sun-like stars. These stars end their lives as white dwarfs, which should inherit any surviving planetary systems. Manser
<jats:italic>et al.</jats:italic>
found periodic shifts in emission lines from a disc of gas orbiting around a white dwarf (see the Perspective by Fossati). They used numerical simulations to show that the most likely explanation for the spectral shifts is a low-mass planet orbiting within the disc. The planet must be unusually small and dense to avoid being ripped apart by tidal forces. The authors speculate that it may be the leftover core of a planet whose outer layers have been removed.
</jats:p>
<jats:p>
<jats:italic>Science</jats:italic>
, this issue p.
<jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6435" page="66" related-article-type="in-this-issue" vol="364" xlink:href="10.1126/science.aat5330">66</jats:related-article>
; see also p.
<jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6435" page="25" related-article-type="in-this-issue" vol="364" xlink:href="10.1126/science.aax0051">25</jats:related-article>
</jats:p>
File(s)
