Planetesimals drifting through dusty and gaseous white dwarf debris discs: Types I, II and III-like migration

Dimitri Veras; Shigeru Ida; Evgeni Grishin; Scott J. Kenyon; Benjamin C. Bromley

doi:10.1093/mnras/stad1790

Planetesimals drifting through dusty and gaseous white dwarf debris discs: Types I, II and III-like migration

Dimitri Veras, Shigeru Ida, Evgeni Grishin, Scott J. Kenyon, Benjamin C. Bromley

School of Physics and Astronomy

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

1 Citation (Scopus)

Abstract

The suite of over 60 known planetary debris discs which orbit white dwarfs, along with detections of multiple minor planets in these systems, motivate investigations about the migration properties of planetesimals embedded within the discs. Here, we determine whether any of the migration regimes which are common in (pre-)main-sequence protoplanetary discs, debris discs, and ring systems could be active and important in white dwarf discs. We investigate both dust-dominated and gas-dominated regions, and quantitatively demonstrate that Type I and Type II migration, as well as their particulate disc analogues, are too slow to be relevant in white dwarf discs. However, we find that the analogue of Type III migration for particulate discs may be rapid in the dusty regions of asteroid-or moon-generated (>1018 kg) white dwarf discs, where a planetesimal exterior to its Roche radius may migrate across the entire disc within its lifetime. This result holds over a wide range of disc boundaries, both within and exterior to 1RâŠ , and such that the probability of migration occurring increases with higher disc masses.

Original language	English
Pages (from-to)	1-17
Number of pages	17
Journal	Monthly Notices of the Royal Astronomical Society
Volume	524
Issue number	1
DOIs	https://doi.org/10.1093/mnras/stad1790
Publication status	Published - Sept 2023

Keywords

minor planets, asteroids: general
planet-star interactions
planets and satellites: dynamical evolution and stability
planets and satellites: formation
protoplanetary discs
white dwarfs

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10.1093/mnras/stad1790Licence: CC BY

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title = "Planetesimals drifting through dusty and gaseous white dwarf debris discs: Types I, II and III-like migration",

abstract = "The suite of over 60 known planetary debris discs which orbit white dwarfs, along with detections of multiple minor planets in these systems, motivate investigations about the migration properties of planetesimals embedded within the discs. Here, we determine whether any of the migration regimes which are common in (pre-)main-sequence protoplanetary discs, debris discs, and ring systems could be active and important in white dwarf discs. We investigate both dust-dominated and gas-dominated regions, and quantitatively demonstrate that Type I and Type II migration, as well as their particulate disc analogues, are too slow to be relevant in white dwarf discs. However, we find that the analogue of Type III migration for particulate discs may be rapid in the dusty regions of asteroid-or moon-generated (>1018 kg) white dwarf discs, where a planetesimal exterior to its Roche radius may migrate across the entire disc within its lifetime. This result holds over a wide range of disc boundaries, both within and exterior to 1R{\^a}{\v S} , and such that the probability of migration occurring increases with higher disc masses.",

keywords = "minor planets, asteroids: general, planet-star interactions, planets and satellites: dynamical evolution and stability, planets and satellites: formation, protoplanetary discs, white dwarfs",

author = "Dimitri Veras and Shigeru Ida and Evgeni Grishin and Kenyon, {Scott J.} and Bromley, {Benjamin C.}",

note = "Publisher Copyright: {\textcopyright} 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.",

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AU - Veras, Dimitri

AU - Ida, Shigeru

AU - Grishin, Evgeni

AU - Kenyon, Scott J.

AU - Bromley, Benjamin C.

PY - 2023/9

Y1 - 2023/9

N2 - The suite of over 60 known planetary debris discs which orbit white dwarfs, along with detections of multiple minor planets in these systems, motivate investigations about the migration properties of planetesimals embedded within the discs. Here, we determine whether any of the migration regimes which are common in (pre-)main-sequence protoplanetary discs, debris discs, and ring systems could be active and important in white dwarf discs. We investigate both dust-dominated and gas-dominated regions, and quantitatively demonstrate that Type I and Type II migration, as well as their particulate disc analogues, are too slow to be relevant in white dwarf discs. However, we find that the analogue of Type III migration for particulate discs may be rapid in the dusty regions of asteroid-or moon-generated (>1018 kg) white dwarf discs, where a planetesimal exterior to its Roche radius may migrate across the entire disc within its lifetime. This result holds over a wide range of disc boundaries, both within and exterior to 1RâŠ , and such that the probability of migration occurring increases with higher disc masses.

AB - The suite of over 60 known planetary debris discs which orbit white dwarfs, along with detections of multiple minor planets in these systems, motivate investigations about the migration properties of planetesimals embedded within the discs. Here, we determine whether any of the migration regimes which are common in (pre-)main-sequence protoplanetary discs, debris discs, and ring systems could be active and important in white dwarf discs. We investigate both dust-dominated and gas-dominated regions, and quantitatively demonstrate that Type I and Type II migration, as well as their particulate disc analogues, are too slow to be relevant in white dwarf discs. However, we find that the analogue of Type III migration for particulate discs may be rapid in the dusty regions of asteroid-or moon-generated (>1018 kg) white dwarf discs, where a planetesimal exterior to its Roche radius may migrate across the entire disc within its lifetime. This result holds over a wide range of disc boundaries, both within and exterior to 1RâŠ , and such that the probability of migration occurring increases with higher disc masses.

KW - minor planets, asteroids: general

KW - planet-star interactions

KW - planets and satellites: dynamical evolution and stability

KW - planets and satellites: formation

KW - protoplanetary discs

KW - white dwarfs

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Planetesimals drifting through dusty and gaseous white dwarf debris discs: Types I, II and III-like migration

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Keywords

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ARC Centre of Excellence for Gravitational Wave Discovery

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Planetesimals drifting through dusty and gaseous white dwarf debris discs: Types I, II and III-like migration

Abstract

Keywords

Access to Document

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ARC Centre of Excellence for Gravitational Wave Discovery

Cite this