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@ARTICLE{Pfalzner:1031512,
author = {Pfalzner, Susanne and Govind, Amith and Wagner, Frank},
title = {{I}rregular {M}oons {P}ossibly {I}njected from the {O}uter
{S}olar {S}ystem by a {S}tellar {F}lyby},
journal = {The astrophysical journal / Part 2},
volume = {972},
number = {2},
issn = {2041-8205},
address = {London},
publisher = {Institute of Physics Publ.},
reportid = {FZJ-2024-05713},
pages = {L21},
year = {2024},
abstract = {The irregular moons orbit the giant planets on distant,
inclined, and eccentric trajectories, in sharp contrast with
the coplanar and quasicircular orbits of the regular moons.
The origin of these irregular moons is still an open
question, but these moons have a lot in common with the
objects beyond Neptune (trans-Neptunian objects—TNOs),
suggestive of a common origin. Here, we show that the close
flyby of a star may be the connecting element. A stellar
flyby can simultaneously reproduce the complex TNO dynamics
quantitatively while explaining the origin of the irregular
moons and the color distributions of both populations. This
flyby would have catapulted $7.2\%$ of the original TNO
population into the region of the planets, many on
retrograde orbits. Most injected TNOs would have been
subsequently ejected from the solar system $(85\%).$
However, a considerable fraction would have had the
potential to be captured by the planets. The exclusively
distant origin of the injected TNOs may also explain the
lack of very red irregular moons.},
cin = {JSC},
ddc = {520},
cid = {I:(DE-Juel1)JSC-20090406},
pnm = {5121 - Supercomputing $\&$ Big Data Facilities (POF4-512)},
pid = {G:(DE-HGF)POF4-5121},
typ = {PUB:(DE-HGF)16},
UT = {WOS:001304242800001},
doi = {10.3847/2041-8213/ad63a6},
url = {https://juser.fz-juelich.de/record/1031512},
}