The great escape: how exoplanets and smaller bodies desert dying stars
By D. Veras, M. C. Wyatt, A. Mustill, Amy Bonsor, J. Eldridge. 2011
172 citations recorded by the source corpus.
Mounting discoveries of extrasolar planets orbiting post-main sequence stars motivate studies aimed at understanding the fate of these planets. In the traditional “adiabatic” approximation, a secondary’s eccentricity remains constant during stellar mass loss. Here, we remove this approximation, investigate the full twobody point-mass problem with isotropic mass loss, and illustrate the resulting dynamical evolution. The magnitude and duration of a star’s mass loss combined with a secondary’s initial orbital characteristics might provoke ejection, modest eccentricity pumping, or even circularisation of the orbit. We conclude that Oort clouds and wide-separation planets may be dynamically ejected from 1M⊙ 7M⊙ parent stars during AGB evolution. The vast majority of planetary material which survives a supernova from a 7M⊙ 20M⊙ progenitor will be dynamically ejected from the system, placing limits on the existence of firstgeneration pulsar planets. Planets around > 20M⊙ black hole progenitors may easily survive or readily be ejected depending on the core collapse and superwind models applied. Material ejected during stellar evolution might contribute significantly to the free-floating planetary population.
Subfields: Astronomy and Astrophysics
View Paper: https://www.semanticscholar.org/paper/a0d455e0d2ca8777fabd6970d148390fa583d66a
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In Astronomy and Astrophysics
Citations in the corpus
- THE LINK BETWEEN PLANETARY SYSTEMS, DUSTY WHITE DWARFS, AND METAL-POLLUTED WHITE DWARFS (2012, background): “Both scenarios could be helped by eccentricity pumping of icy bodies further away from the inner system that don’t see the mass loss of the central star as adiabatic (Veras et al. 2011).”
- Simulations of two-planet systems through all phases of stellar evolution: implications for the instability boundary and white dwarf pollution (2013, background): “Veras et al. (2011) found that linearly interpolating SSE stellar mass output at each MERCURY time-step adequately models the dynamical evolution of a single planet amidst stellar mass-loss because the numerical simulations reproduced the analytical results.”
- The frequency of planetary debris around young white dwarfs (2014, background): “The ensuing long-term orbital evolution is complex and may lead to planet ejections or collisions (Debes & Sigurdsson 2002; Veras et al. 2011; Voyatzis et al. 2013).”
- Formation of planetary debris discs around white dwarfs – I. Tidal disruption of an extremely eccentric asteroid (2014, background): “…survive dynamical instabilities or tidal engulfment during the giant branch phases of their parent stars will harbour wider orbits by a factor of a few, and not be ejected due to mass-loss alone (Veras et al. 2011) even for particularly violent stellar structure assumptions (Veras & Wyatt 2012).”
- FORETELLINGS OF RAGNARÖK: WORLD-ENGULFING ASYMPTOTIC GIANTS AND THE INHERITANCE OF WHITE DWARFS (2012, background): “This criterion was parameterized by Veras et al. (2011) as Ψ = 1 2π Ṁ M⊙ yr−1 ( a AU )3/2 ( M⋆ M⊙ )−3/2 , (10) finding that substantial deviations from adiabaticity could arise forΨ as small as0.”