Research PaperResearchia:202610.04002
Review and Summary of Chaos in Multiplanetary Extrasolar Systems
Chirayu Gupta (Review & Summary Document)
Abstract
This document provides a critical review and summary of the research paper "Chaos in multiplanetary extrasolar systems" by Pavol Gajdoš and Martin Vaňko (2022). It evaluates the dynamical stability of 178 multiplanetary systems from the NASA Exoplanet Archive using MEGNO chaos indicators, Lyapunov times, and SPOCK machine-learning probabilities, comparing findings against the AMD-stability criterion.
Submitted: October 4, 2026Subjects: Astrophysics; Review
Description / Details
<div><li style="font-family: "Google Sans Text", sans-serif !important; line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;"><p data-path-to-node="1,2,1,0,0" id="p-rc_370a21126857465f-103" style="line-height: 1.15 !important;"><span data-path-to-node="1,2,1,0,0,0" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;">Analyzes a dataset of 178 confirmed multiplanetary systems following initial archive filtering</span><span data-path-to-node="1,2,1,0,0,1" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;"><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><source-footnote _nghost-ng-c3311948484="" class="ng-star-inserted" style="line-height: 1.15 !important; 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margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;"><!----><!----><!----><!----><!----></source-inline-chip><!----><!----><!----></sources-carousel-inline></p></li><li style="font-family: "Google Sans Text", sans-serif !important; line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;"><p data-path-to-node="1,2,1,1,0" id="p-rc_370a21126857465f-104" style="line-height: 1.15 !important;"><span data-path-to-node="1,2,1,1,0,0" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;">Explores key dynamical metrics including the MEGNO indicator, Lyapunov exponents/times, mean-motion resonances, and machine-learning predictions via SPOCK</span><span data-path-to-node="1,2,1,1,0,1" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;"><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><source-footnote _nghost-ng-c3311948484="" class="ng-star-inserted" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;"><sup _ngcontent-ng-c3311948484="" class="superscript" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important; font-size: 16px !important; background-color: transparent !important;"><!----></sup></source-footnote><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----></span><span data-path-to-node="1,2,1,1,0,2" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;">.</span><sources-carousel-inline ng-version="0.0.0-PLACEHOLDER" _nghost-ng-c2491616118="" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;"> <!----><source-inline-chip _ngcontent-ng-c2491616118="" _nghost-ng-c3301109706="" class="ng-star-inserted" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;"><!----><!----><!----><!----><!----></source-inline-chip><!----><!----><!----></sources-carousel-inline></p></li><li style="font-family: "Google Sans Text", sans-serif !important; line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;"><p data-path-to-node="1,2,1,2,0" id="p-rc_370a21126857465f-105" style="line-height: 1.15 !important;"><span data-path-to-node="1,2,1,2,0,0" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;">Discusses discrepancies between MEGNO stability results and Angular Momentum Deficit (AMD) classifications</span><span data-path-to-node="1,2,1,2,0,1" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;"><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><source-footnote _nghost-ng-c3311948484="" class="ng-star-inserted" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;"><sup _ngcontent-ng-c3311948484="" class="superscript" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important; font-size: 16px !important; background-color: transparent !important;"><!----></sup></source-footnote><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----></span><span data-path-to-node="1,2,1,2,0,2" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;">.</span><sources-carousel-inline ng-version="0.0.0-PLACEHOLDER" _nghost-ng-c2491616118="" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;"> <!----><source-inline-chip _ngcontent-ng-c2491616118="" _nghost-ng-c3301109706="" class="ng-star-inserted" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;"><!----><!----><!----><!----><!----></source-inline-chip><!----><!----><!----></sources-carousel-inline></p></li><li style="font-family: "Google Sans Text", sans-serif !important; line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;"><p data-path-to-node="1,2,1,3,0" id="p-rc_370a21126857465f-106" style="line-height: 1.15 !important;"><span data-path-to-node="1,2,1,3,0,0" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;">Features a personal academic perspective evaluating simulation timescales, data constraints, and methodological trade-offs</span><span data-path-to-node="1,2,1,3,0,1" style="line-height: 1.15 !important; margin-top: 0px !important; margin-left: 0px !important; margin-right: 0px !important;"><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><source-footnote _nghost-ng-c3311948484="" class="ng-star-inserted" style="line-height: 1.15 !important; 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Submission Info
Date:
Oct 4, 2026
Oct 4, 2026
Topic:
Review
Review
Area:
Astrophysics
Astrophysics
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