Binary star influence on post-main-sequence multi-planet stability

Dimitri Veras; Nikolaos Georgakarakos; Ian Dobbs-Dixon; Boris T. Gänsicke

doi:10.1093/mnras/stw2699

Binary star influence on post-main-sequence multi-planet stability

Dimitri Veras, Nikolaos Georgakarakos, Ian Dobbs-Dixon, Boris T. Gänsicke

Research output: Contribution to journal › Article › peer-review

Abstract

Nearly every star known to host planets will become a white dwarf, and nearly 100 planet-hosts are now known to be accompanied by binary stellar companions. Here, we determine how a binary companion triggers instability in otherwise unconditionally stable single-star two-planet systems during the giant branch and white dwarf phases of the planet host. We perform about 700 full-lifetime (14 Gyr) simulations with A0 and F0 primary stars and secondary K2 companions, and identify the critical binary distance within which instability is triggered at any point during stellar evolution. We estimate this distance to be about seven times the outer planet separation for circular binaries. Our results help characterize the fates of planetary systems, and in particular which ones might yield architectures which are conducive to generating observable metal pollution in white dwarf atmospheres.

Original language	English (US)
Pages (from-to)	2053-2059
Number of pages	7
Journal	Monthly Notices of the Royal Astronomical Society
Volume	465
Issue number	2
DOIs	https://doi.org/10.1093/mnras/stw2699
State	Published - Feb 1 2017

Keywords

Celestial mechanics
Methods: numerical
Minor planets, asteroids: general
Planets and satellites: dynamical evolution and stability
White dwarfs

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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title = "Binary star influence on post-main-sequence multi-planet stability",

abstract = "Nearly every star known to host planets will become a white dwarf, and nearly 100 planet-hosts are now known to be accompanied by binary stellar companions. Here, we determine how a binary companion triggers instability in otherwise unconditionally stable single-star two-planet systems during the giant branch and white dwarf phases of the planet host. We perform about 700 full-lifetime (14 Gyr) simulations with A0 and F0 primary stars and secondary K2 companions, and identify the critical binary distance within which instability is triggered at any point during stellar evolution. We estimate this distance to be about seven times the outer planet separation for circular binaries. Our results help characterize the fates of planetary systems, and in particular which ones might yield architectures which are conducive to generating observable metal pollution in white dwarf atmospheres.",

keywords = "Celestial mechanics, Methods: numerical, Minor planets, asteroids: general, Planets and satellites: dynamical evolution and stability, White dwarfs",

author = "Dimitri Veras and Nikolaos Georgakarakos and Ian Dobbs-Dixon and G{\"a}nsicke, {Boris T.}",

note = "Funding Information: We thank the referee, Cristobal Petrovich, for his insightful and probing feedback, which has improved the manuscript. DV and BTG have received funding from the European Research Council under the European Union{\textquoteright}s Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement n. 320964 (WDTracer). We would like to thank the High Performance Computing Resources team at New York University, Abu Dhabi and especially Jorge Naranjo for helping us carry out our simulations. Funding Information: We thank the referee, Cristobal Petrovich, for his insightful and probing feedback, which has improved the manuscript. DV and BTG have received funding from the European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement n. 320964 (WDTracer). We would like to thank the High Performance Computing Resources team at New York University, Abu Dhabi and especially Jorge Naranjo for helping us carry out our simulations.",

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AU - Georgakarakos, Nikolaos

AU - Dobbs-Dixon, Ian

AU - Gänsicke, Boris T.

N1 - Funding Information: We thank the referee, Cristobal Petrovich, for his insightful and probing feedback, which has improved the manuscript. DV and BTG have received funding from the European Research Council under the European Union’s Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement n. 320964 (WDTracer). We would like to thank the High Performance Computing Resources team at New York University, Abu Dhabi and especially Jorge Naranjo for helping us carry out our simulations. Funding Information: We thank the referee, Cristobal Petrovich, for his insightful and probing feedback, which has improved the manuscript. DV and BTG have received funding from the European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement n. 320964 (WDTracer). We would like to thank the High Performance Computing Resources team at New York University, Abu Dhabi and especially Jorge Naranjo for helping us carry out our simulations.

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