Estimation of the diffusion time in a triaxial galactic potential
- Autores
- Cincotta, Pablo Miguel; Giordano, Claudia Marcela
- Año de publicación
- 2023
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- 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 - Materia
-
Astronomía
chaos
diffusion
galaxies: kinematics and dynamics - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/159923
Ver los metadatos del registro completo
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Estimation of the diffusion time in a triaxial galactic potentialCincotta, Pablo MiguelGiordano, Claudia MarcelaAstronomíachaosdiffusiongalaxies: kinematics and dynamicsIn 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 Geofísicas2023-09-18info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/159923enginfo:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stad2831info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-15T11:33:39Zoai:sedici.unlp.edu.ar:10915/159923Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:33:39.421SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Estimation of the diffusion time in a triaxial galactic potential |
| title |
Estimation of the diffusion time in a triaxial galactic potential |
| spellingShingle |
Estimation of the diffusion time in a triaxial galactic potential Cincotta, Pablo Miguel Astronomía chaos diffusion galaxies: kinematics and dynamics |
| 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 |
| dc.creator.none.fl_str_mv |
Cincotta, Pablo Miguel Giordano, Claudia Marcela |
| author |
Cincotta, Pablo Miguel |
| author_facet |
Cincotta, Pablo Miguel Giordano, Claudia Marcela |
| author_role |
author |
| author2 |
Giordano, Claudia Marcela |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
Astronomía chaos diffusion galaxies: kinematics and dynamics |
| topic |
Astronomía chaos diffusion galaxies: kinematics and dynamics |
| dc.description.none.fl_txt_mv |
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 |
| 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. |
| publishDate |
2023 |
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2023-09-18 |
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publishedVersion |
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http://sedici.unlp.edu.ar/handle/10915/159923 |
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eng |
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eng |
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info:eu-repo/semantics/altIdentifier/issn/0035-8711 info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stad2831 |
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