Models of cuspy triaxial stellar systems - III. The effect of velocity anisotropy on chaoticity

In several previous investigations, we presented models of triaxial stellar systems, both cuspy and non-cuspy, that were highly stable and harboured large fractions of chaotic orbits. All our models had been obtained through cold collapses of initially spherical <i>N</i>-body systems, a...

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Detalles Bibliográficos
Autores principales:	Carpintero, Daniel Diego, Muzzio, Juan Carlos, Navone, Hugo Daniel
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2014
Materias:	Ciencias Astronómicas Chaos Galaxies: elliptical and lenticular, cD Galaxies: kinematics and dynamics Methods: numerical
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/85009
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-85009
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Astronómicas Chaos Galaxies: elliptical and lenticular, cD Galaxies: kinematics and dynamics Methods: numerical
spellingShingle	Ciencias Astronómicas Chaos Galaxies: elliptical and lenticular, cD Galaxies: kinematics and dynamics Methods: numerical Carpintero, Daniel Diego Muzzio, Juan Carlos Navone, Hugo Daniel Models of cuspy triaxial stellar systems - III. The effect of velocity anisotropy on chaoticity
topic_facet	Ciencias Astronómicas Chaos Galaxies: elliptical and lenticular, cD Galaxies: kinematics and dynamics Methods: numerical
description	In several previous investigations, we presented models of triaxial stellar systems, both cuspy and non-cuspy, that were highly stable and harboured large fractions of chaotic orbits. All our models had been obtained through cold collapses of initially spherical <i>N</i>-body systems, a method that necessarily results in models with strongly radial velocity distributions. Here we investigate a different method that was reported to yield cuspy triaxial models with virtually no chaos. We show that such a result was probably due to the use of an inadequate chaos detection technique and that, in fact, models with significant fractions of chaotic orbits result also from that method. Besides, starting with one of the models from the first paper in this series, we obtained three different models by rendering its velocity distribution much less radially biased (i.e. more isotropic) and by modifying its axial ratios through adiabatic compression. All three models yielded much higher fractions of regular orbits than most of those from our previous work. We conclude that it is possible to obtain stable cuspy triaxial models of stellar systems whose velocity distribution is more isotropic than that of the models obtained from cold collapses. Those models still harbour large fractions of chaotic orbits and, although it is difficult to compare the results from different models, we can tentatively conclude that chaoticity is reduced by velocity isotropy.
format	Articulo Articulo
author	Carpintero, Daniel Diego Muzzio, Juan Carlos Navone, Hugo Daniel
author_facet	Carpintero, Daniel Diego Muzzio, Juan Carlos Navone, Hugo Daniel
author_sort	Carpintero, Daniel Diego
title	Models of cuspy triaxial stellar systems - III. The effect of velocity anisotropy on chaoticity
title_short	Models of cuspy triaxial stellar systems - III. The effect of velocity anisotropy on chaoticity
title_full	Models of cuspy triaxial stellar systems - III. The effect of velocity anisotropy on chaoticity
title_fullStr	Models of cuspy triaxial stellar systems - III. The effect of velocity anisotropy on chaoticity
title_full_unstemmed	Models of cuspy triaxial stellar systems - III. The effect of velocity anisotropy on chaoticity
title_sort	models of cuspy triaxial stellar systems - iii. the effect of velocity anisotropy on chaoticity
publishDate	2014
url	http://sedici.unlp.edu.ar/handle/10915/85009
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bdutipo_str	Repositorios
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Models of cuspy triaxial stellar systems - III. The effect of velocity anisotropy on chaoticity

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