Isotopic trichotomy of main belt asteroids from implantation of outer solar system planetesimals

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10492052" target="_blank" >RIV/00216208:11320/24:10492052 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=maE6WlFCF~" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=maE6WlFCF~</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.epsl.2023.118521" target="_blank" >10.1016/j.epsl.2023.118521</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Isotopic trichotomy of main belt asteroids from implantation of outer solar system planetesimals

Popis výsledku v původním jazyce

Recent analyses of samples from asteroid (162173) Ryugu returned by JAXA&apos;s Hayabusa2 mission suggest that Ryugu and CI chondrites formed in the same region of the protoplanetary disk, in a reservoir that was isolated from the source regions of other carbonaceous (C-type) asteroids. Here we conduct Nu-body simulations in which CI planetesimals are assumed to have formed in the Uranus/Neptune zone at -15-25 au from the Sun. We show that CI planetesimals are scattered by giant planets toward the asteroid belt where their orbits can be circularized by aerodynamic gas drag. We find that the dynamical implantation of CI asteroids from -15-25 au is very efficient with -5% of -100-km planetesimals reaching stable orbits in the asteroid belt by the end of the protoplanetary gas disk lifetime. The efficiency is reduced when planetesimal ablation is accounted for. The implanted population subsequently evolved by collisions and was depleted by dynamical instabilities. The model can explain why CIs are isotopically distinct from other C-type asteroids which presumably formed at -5-10 au.

Název v anglickém jazyce

Isotopic trichotomy of main belt asteroids from implantation of outer solar system planetesimals

Popis výsledku anglicky

Recent analyses of samples from asteroid (162173) Ryugu returned by JAXA&apos;s Hayabusa2 mission suggest that Ryugu and CI chondrites formed in the same region of the protoplanetary disk, in a reservoir that was isolated from the source regions of other carbonaceous (C-type) asteroids. Here we conduct Nu-body simulations in which CI planetesimals are assumed to have formed in the Uranus/Neptune zone at -15-25 au from the Sun. We show that CI planetesimals are scattered by giant planets toward the asteroid belt where their orbits can be circularized by aerodynamic gas drag. We find that the dynamical implantation of CI asteroids from -15-25 au is very efficient with -5% of -100-km planetesimals reaching stable orbits in the asteroid belt by the end of the protoplanetary gas disk lifetime. The efficiency is reduced when planetesimal ablation is accounted for. The implanted population subsequently evolved by collisions and was depleted by dynamical instabilities. The model can explain why CIs are isotopically distinct from other C-type asteroids which presumably formed at -5-10 au.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA21-11058S" target="_blank" >GA21-11058S: Raný orbitální a chemický vývoj planetárních soustav</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Earth and Planetary Science Letters

ISSN

0012-821X

e-ISSN

1385-013X

Svazek periodika

626

Číslo periodika v rámci svazku

leden

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

118521

Kód UT WoS článku

001134308400001

EID výsledku v databázi Scopus

2-s2.0-85179127727