Estimation of the diffusion time in a triaxial galactic potential

In this work we apply the Shannon entropy based method to derive a diffusion or instability time in a triaxial model resembling an elliptical galaxy. We succeed in getting an accurate time-scale for diffusion using this no v el technique after adopting a particular initial starting space, the one de...

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Detalles Bibliográficos
Autores principales: Cincotta, Pablo Miguel, Giordano, Claudia Marcela
Formato: Articulo
Lenguaje:Inglés
Publicado: 2023
Materias:
Astronomía
chaos
diffusion
galaxies: kinematics and dynamics
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/159923
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-159923
record_format dspace
spelling I19-R120-10915-1599232023-11-08T20:06:47Z http://sedici.unlp.edu.ar/handle/10915/159923 Estimation of the diffusion time in a triaxial galactic potential Cincotta, Pablo Miguel Giordano, Claudia Marcela 2023-09-18 2023-11-08T13:30:36Z en Astronomía chaos diffusion galaxies: kinematics and dynamics In this work we apply the Shannon entropy based method to derive a diffusion or instability time in a triaxial model resembling an elliptical galaxy. We succeed in getting an accurate time-scale for diffusion using this no v el technique after adopting a particular initial starting space, the one defined by the unperturbed integrals of the system. Comparisons with other standard techniques, such as a least-squares fit on the variance evolution of the integrals and the straight numerical integrations of the equations of motion, are included. The physical results provided in this effort reveal that the role of chaotic motion in triaxial galactic models is almost irrele v ant in galactic time-scales, in agreement with previous qualitative approaches to this issue. Facultad de Ciencias Astronómicas y Geofísicas Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Astronomía
chaos
diffusion
galaxies: kinematics and dynamics
spellingShingle Astronomía
chaos
diffusion
galaxies: kinematics and dynamics
Cincotta, Pablo Miguel
Giordano, Claudia Marcela
Estimation of the diffusion time in a triaxial galactic potential
topic_facet Astronomía
chaos
diffusion
galaxies: kinematics and dynamics
description In this work we apply the Shannon entropy based method to derive a diffusion or instability time in a triaxial model resembling an elliptical galaxy. We succeed in getting an accurate time-scale for diffusion using this no v el technique after adopting a particular initial starting space, the one defined by the unperturbed integrals of the system. Comparisons with other standard techniques, such as a least-squares fit on the variance evolution of the integrals and the straight numerical integrations of the equations of motion, are included. The physical results provided in this effort reveal that the role of chaotic motion in triaxial galactic models is almost irrele v ant in galactic time-scales, in agreement with previous qualitative approaches to this issue.
format Articulo
Articulo
author Cincotta, Pablo Miguel
Giordano, Claudia Marcela
author_facet Cincotta, Pablo Miguel
Giordano, Claudia Marcela
author_sort Cincotta, Pablo Miguel
title Estimation of the diffusion time in a triaxial galactic potential
title_short Estimation of the diffusion time in a triaxial galactic potential
title_full Estimation of the diffusion time in a triaxial galactic potential
title_fullStr Estimation of the diffusion time in a triaxial galactic potential
title_full_unstemmed Estimation of the diffusion time in a triaxial galactic potential
title_sort estimation of the diffusion time in a triaxial galactic potential
publishDate 2023
url http://sedici.unlp.edu.ar/handle/10915/159923
work_keys_str_mv AT cincottapablomiguel estimationofthediffusiontimeinatriaxialgalacticpotential
AT giordanoclaudiamarcela estimationofthediffusiontimeinatriaxialgalacticpotential
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