Constraints on the pre-impact orbits of Solar system giant impactors

Alan P. Jackson, Travis S.J. Gabriel, Erik I. Asphaug

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We provide a fast method for computing constraints on impactor pre-impact orbits, applying this to the late giant impacts in the Solar system. These constraints can be used to make quick, broad comparisons of different collision scenarios, identifying some immediately as low-probability events, and narrowing the parameter space in which to target follow-up studies with expensive N-body simulations. We benchmark our parameter space predictions, finding good agreement with existing N-body studies for the Moon. We suggest that high-velocity impact scenarios in the inner Solar system, including all currently proposed single impact scenarios for the formation of Mercury, should be disfavoured. This leaves a multiple hit-andrun scenario as the most probable currently proposed for the formation of Mercury.

Original languageEnglish (US)
Pages (from-to)2924-2936
Number of pages13
JournalMonthly Notices of the Royal Astronomical Society
Volume474
Issue number3
DOIs
StatePublished - Mar 1 2018

Fingerprint

impactors
solar system
orbits
Moon
impact velocity
collision
moon
leaves
prediction
simulation
collisions
predictions
impactor
mercury
parameter
comparison
method

Keywords

  • Celestial mechanics
  • Methods: numerical
  • Moon
  • Planets and satellites: formation
  • Planets and satellites: terrestrial planets

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Constraints on the pre-impact orbits of Solar system giant impactors. / Jackson, Alan P.; Gabriel, Travis S.J.; Asphaug, Erik I.

In: Monthly Notices of the Royal Astronomical Society, Vol. 474, No. 3, 01.03.2018, p. 2924-2936.

Research output: Contribution to journalArticle

Jackson, Alan P. ; Gabriel, Travis S.J. ; Asphaug, Erik I. / Constraints on the pre-impact orbits of Solar system giant impactors. In: Monthly Notices of the Royal Astronomical Society. 2018 ; Vol. 474, No. 3. pp. 2924-2936.
@article{46885c68c19f444ea95b8240ef0b3cf8,
title = "Constraints on the pre-impact orbits of Solar system giant impactors",
abstract = "We provide a fast method for computing constraints on impactor pre-impact orbits, applying this to the late giant impacts in the Solar system. These constraints can be used to make quick, broad comparisons of different collision scenarios, identifying some immediately as low-probability events, and narrowing the parameter space in which to target follow-up studies with expensive N-body simulations. We benchmark our parameter space predictions, finding good agreement with existing N-body studies for the Moon. We suggest that high-velocity impact scenarios in the inner Solar system, including all currently proposed single impact scenarios for the formation of Mercury, should be disfavoured. This leaves a multiple hit-andrun scenario as the most probable currently proposed for the formation of Mercury.",
keywords = "Celestial mechanics, Methods: numerical, Moon, Planets and satellites: formation, Planets and satellites: terrestrial planets",
author = "Jackson, {Alan P.} and Gabriel, {Travis S.J.} and Asphaug, {Erik I.}",
year = "2018",
month = "3",
day = "1",
doi = "10.1093/mnras/stx2901",
language = "English (US)",
volume = "474",
pages = "2924--2936",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "3",

}

TY - JOUR

T1 - Constraints on the pre-impact orbits of Solar system giant impactors

AU - Jackson, Alan P.

AU - Gabriel, Travis S.J.

AU - Asphaug, Erik I.

PY - 2018/3/1

Y1 - 2018/3/1

N2 - We provide a fast method for computing constraints on impactor pre-impact orbits, applying this to the late giant impacts in the Solar system. These constraints can be used to make quick, broad comparisons of different collision scenarios, identifying some immediately as low-probability events, and narrowing the parameter space in which to target follow-up studies with expensive N-body simulations. We benchmark our parameter space predictions, finding good agreement with existing N-body studies for the Moon. We suggest that high-velocity impact scenarios in the inner Solar system, including all currently proposed single impact scenarios for the formation of Mercury, should be disfavoured. This leaves a multiple hit-andrun scenario as the most probable currently proposed for the formation of Mercury.

AB - We provide a fast method for computing constraints on impactor pre-impact orbits, applying this to the late giant impacts in the Solar system. These constraints can be used to make quick, broad comparisons of different collision scenarios, identifying some immediately as low-probability events, and narrowing the parameter space in which to target follow-up studies with expensive N-body simulations. We benchmark our parameter space predictions, finding good agreement with existing N-body studies for the Moon. We suggest that high-velocity impact scenarios in the inner Solar system, including all currently proposed single impact scenarios for the formation of Mercury, should be disfavoured. This leaves a multiple hit-andrun scenario as the most probable currently proposed for the formation of Mercury.

KW - Celestial mechanics

KW - Methods: numerical

KW - Moon

KW - Planets and satellites: formation

KW - Planets and satellites: terrestrial planets

UR - http://www.scopus.com/inward/record.url?scp=85040247107&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85040247107&partnerID=8YFLogxK

U2 - 10.1093/mnras/stx2901

DO - 10.1093/mnras/stx2901

M3 - Article

AN - SCOPUS:85040247107

VL - 474

SP - 2924

EP - 2936

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 3

ER -