Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

The formation of transiting circumplanetary debris discs from the disruption of satellite systems during planet-planet scattering

Mustill, Alexander J. LU orcid ; Davies, Melvyn B. LU and Kenworthy, Matthew A. (2024) In Monthly Notices of the Royal Astronomical Society 530(4). p.3606-3616
Abstract

Several stars show deep transits consistent with discs of roughly seen at moderate inclinations, likely surrounding planets on eccentric orbits. We show that this configuration arises naturally as a result of planet-planet scattering when the planets possess satellite systems. Planet-planet scattering explains the orbital eccentricities of the discs' host bodies, while the close encounters during scattering lead to the exchange of satellites between planets and/or their destabilization. This leads to collisions between satellites and their tidal disruption close to the planet. Both of these events lead to large quantities of debris being produced, which in time will settle into a disc such as those observed. The mass of debris required... (More)

Several stars show deep transits consistent with discs of roughly seen at moderate inclinations, likely surrounding planets on eccentric orbits. We show that this configuration arises naturally as a result of planet-planet scattering when the planets possess satellite systems. Planet-planet scattering explains the orbital eccentricities of the discs' host bodies, while the close encounters during scattering lead to the exchange of satellites between planets and/or their destabilization. This leads to collisions between satellites and their tidal disruption close to the planet. Both of these events lead to large quantities of debris being produced, which in time will settle into a disc such as those observed. The mass of debris required is comparable to a Ceres-sized satellite. Through N-body simulations of planets with clones of the Galilean satellite system undergoing scattering, we show that 90 per cent of planets undergoing scattering will possess debris from satellite destruction. Extrapolating to smaller numbers of satellites suggests that tens of per cent of such planets should still possess circumplanetary debris discs. The debris trails arising from these events are often tilted at tens of degrees to the planetary orbit, consistent with the inclinations of the observed discs. Disruption of satellite systems during scattering thus simultaneously explains the existence of debris, the tilt of the discs, and the eccentricity of the planets they orbit.

(Less)
Please use this url to cite or link to this publication:
author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
planets and satellites: dynamical evolution and stability, planets and satellites: gaseous planets, planets and satellites: rings, stars: individual: EPIC 220208795
in
Monthly Notices of the Royal Astronomical Society
volume
530
issue
4
pages
11 pages
publisher
Oxford University Press
external identifiers
  • scopus:85193026178
ISSN
0035-8711
DOI
10.1093/mnras/stae1074
language
English
LU publication?
yes
id
44915c79-13eb-40db-a507-54c8b6bc1b46
date added to LUP
2024-05-23 11:26:23
date last changed
2024-05-23 11:27:02
@article{44915c79-13eb-40db-a507-54c8b6bc1b46,
  abstract     = {{<p>Several stars show deep transits consistent with discs of roughly seen at moderate inclinations, likely surrounding planets on eccentric orbits. We show that this configuration arises naturally as a result of planet-planet scattering when the planets possess satellite systems. Planet-planet scattering explains the orbital eccentricities of the discs' host bodies, while the close encounters during scattering lead to the exchange of satellites between planets and/or their destabilization. This leads to collisions between satellites and their tidal disruption close to the planet. Both of these events lead to large quantities of debris being produced, which in time will settle into a disc such as those observed. The mass of debris required is comparable to a Ceres-sized satellite. Through N-body simulations of planets with clones of the Galilean satellite system undergoing scattering, we show that 90 per cent of planets undergoing scattering will possess debris from satellite destruction. Extrapolating to smaller numbers of satellites suggests that tens of per cent of such planets should still possess circumplanetary debris discs. The debris trails arising from these events are often tilted at tens of degrees to the planetary orbit, consistent with the inclinations of the observed discs. Disruption of satellite systems during scattering thus simultaneously explains the existence of debris, the tilt of the discs, and the eccentricity of the planets they orbit.</p>}},
  author       = {{Mustill, Alexander J. and Davies, Melvyn B. and Kenworthy, Matthew A.}},
  issn         = {{0035-8711}},
  keywords     = {{planets and satellites: dynamical evolution and stability; planets and satellites: gaseous planets; planets and satellites: rings; stars: individual: EPIC 220208795}},
  language     = {{eng}},
  month        = {{06}},
  number       = {{4}},
  pages        = {{3606--3616}},
  publisher    = {{Oxford University Press}},
  series       = {{Monthly Notices of the Royal Astronomical Society}},
  title        = {{The formation of transiting circumplanetary debris discs from the disruption of satellite systems during planet-planet scattering}},
  url          = {{http://dx.doi.org/10.1093/mnras/stae1074}},
  doi          = {{10.1093/mnras/stae1074}},
  volume       = {{530}},
  year         = {{2024}},
}