Chaos in elliptical galaxies

Here I present a review of the work done on the presence and effects of chaos in elliptical galaxies plus some recent results we obtained on this subject. The fact that important fractions of the orbits that arise in potentials adequate to represent elliptical galaxies are chaotic is nowadays undeni...

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Autor principal: Muzzio, Juan Carlos
Formato: Objeto de conferencia
Lenguaje:Inglés
Publicado: 2011
Materias:
Ciencias Astronómicas
elliptical galaxies
chaos
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/167638
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SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-167638
record_format dspace
spelling I19-R120-10915-1676382024-07-01T20:02:49Z http://sedici.unlp.edu.ar/handle/10915/167638 Chaos in elliptical galaxies Muzzio, Juan Carlos 2011-07 2012 2024-07-01T16:35:38Z en Ciencias Astronómicas elliptical galaxies chaos Here I present a review of the work done on the presence and effects of chaos in elliptical galaxies plus some recent results we obtained on this subject. The fact that important fractions of the orbits that arise in potentials adequate to represent elliptical galaxies are chaotic is nowadays undeniable. Alternatively, it has been difficult to build selfconsistent models of elliptical galaxies that include significant fractions of chaotic orbits and, at the same time, are stable. That is specially true for cuspy models of elliptical galaxies which seem to best represent real galaxies. I argue here that there is no physical impediment to build such models and that the difficulty lies in the method of Schwarzschild, widely used to obtain such models. Actually, I show that there is no problem in obtaining selfconsistent models of elliptical galaxies, even cuspy ones, that contain very high fractions of chaotic orbits and are, nevertheless, highly stable over time intervals of the order of a Hubble time. Facultad de Ciencias Astronómicas y Geofísicas Objeto de conferencia Objeto de conferencia 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 263-275
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
elliptical galaxies
chaos
spellingShingle Ciencias Astronómicas
elliptical galaxies
chaos
Muzzio, Juan Carlos
Chaos in elliptical galaxies
topic_facet Ciencias Astronómicas
elliptical galaxies
chaos
description Here I present a review of the work done on the presence and effects of chaos in elliptical galaxies plus some recent results we obtained on this subject. The fact that important fractions of the orbits that arise in potentials adequate to represent elliptical galaxies are chaotic is nowadays undeniable. Alternatively, it has been difficult to build selfconsistent models of elliptical galaxies that include significant fractions of chaotic orbits and, at the same time, are stable. That is specially true for cuspy models of elliptical galaxies which seem to best represent real galaxies. I argue here that there is no physical impediment to build such models and that the difficulty lies in the method of Schwarzschild, widely used to obtain such models. Actually, I show that there is no problem in obtaining selfconsistent models of elliptical galaxies, even cuspy ones, that contain very high fractions of chaotic orbits and are, nevertheless, highly stable over time intervals of the order of a Hubble time.
format Objeto de conferencia
Objeto de conferencia
author Muzzio, Juan Carlos
author_facet Muzzio, Juan Carlos
author_sort Muzzio, Juan Carlos
title Chaos in elliptical galaxies
title_short Chaos in elliptical galaxies
title_full Chaos in elliptical galaxies
title_fullStr Chaos in elliptical galaxies
title_full_unstemmed Chaos in elliptical galaxies
title_sort chaos in elliptical galaxies
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/167638
work_keys_str_mv AT muzziojuancarlos chaosinellipticalgalaxies
_version_ 1807223539307118592

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