The Link Between Planetary Systems, Dusty White Dwarfs, and Metal Polluted White Dwarfs
J. Debes, K. Walsh, C. Stark

TL;DR
This paper proposes a mechanism where stellar mass loss perturbs planetesimals into white dwarf tidal disruption orbits, explaining observed metal pollution and dust disks, and linking planetary systems to white dwarf characteristics.
Contribution
It introduces a new physical mechanism involving mass loss and mean motion resonances that explains metal pollution and dust around white dwarfs, supported by N-body simulations.
Findings
Mass loss can perturb planetesimals into disruptive orbits.
A single giant planet and asteroid belt can produce observed pollution.
Disrupted planetesimals create debris streams for dust formation.
Abstract
It has long been suspected that metal polluted white dwarfs (types DAZ, DBZ, and DZ) and white dwarfs with dusty disks possess planetary systems, but a specific physical mechanism by which planetesimals are perturbed close to a white dwarf has not yet been fully posited. In this paper we demonstrate that mass loss from a central star during post main sequence evolution can sweep planetesimals into interior mean motion resonances with a single giant planet. These planetesimals are slowly removed through chaotic excursions of eccentricity that in time create radial orbits capable of tidally disrupting the planetesimal. Numerical N-body simulations of the Solar System show that a sufficient number of planetesimals are perturbed to explain white dwarfs with both dust and metal pollution, provided other white dwarfs have more massive relic asteroid belts. Our scenario requires only one…
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