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The complete form of moment equations of stellar dynamics
dc.contributor.author | Cubarsí Morera, Rafael |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Matemàtica Aplicada IV |
dc.date.accessioned | 2007-10-11T18:04:39Z |
dc.date.available | 2007-10-11T18:04:39Z |
dc.date.issued | 2007-03-30 |
dc.identifier.uri | http://hdl.handle.net/2117/1242 |
dc.description.abstract | The exact mathematical expression for an arbitrary nth-order stellar hydrodynamic equation is explicitly obtained depending on the central moments of the velocity distribution. In such a form the equations are physically meaningful, since they can be compared with the ordinary hy- drodynamic equations of compressible, viscous fluids. The equations are deduced without any particular assumptions about symmetries, steadi- ness, or particular kinematic behaviours, so that they can be used in their complete form, and for any order, in future works with improved observational data. Also, in order to work with a finite number of equa- tions and unknowns, which would provide a dynamic model for the stel- lar system, the nth-order equation is needed to investigate in a more general way the closure conditions, which may be expressed in terms of velocity distribution statistics, as it is shown in a case example. |
dc.format.extent | 15 |
dc.language.iso | eng |
dc.rights | Attribution-NonCommercial-NoDerivs 2.5 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/2.5/es/ |
dc.subject | Àrees temàtiques de la UPC::Matemàtiques i estadística::Equacions diferencials i integrals::Sistemes dinàmics |
dc.subject | Àrees temàtiques de la UPC::Física::Astronomia i astrofísica::Cosmologia i cosmogonia |
dc.subject.lcsh | Stellar dynamics |
dc.subject.lcsh | Hydrodynamics Mathematical models |
dc.subject.other | hydrodynamics |
dc.subject.other | statistics |
dc.subject.other | methods: analytical |
dc.subject.other | stars: kinematics |
dc.subject.other | galaxies: kinematics and dynamics |
dc.subject.other | galaxies: statistics |
dc.title | The complete form of moment equations of stellar dynamics |
dc.type | External research report |
dc.subject.lemac | Hidrodinàmica -- Matemàtica |
dc.subject.lemac | Dinàmica estel·lar |
dc.contributor.group | Universitat Politècnica de Catalunya. gAGE - Grup d'Astronomia i Geomàtica |
dc.subject.ams | Classificació AMS::60 Probability theory and stochastic processes |
dc.subject.ams | Classificació AMS::62 Statistics |
dc.subject.ams | Classificació AMS::85 Astronomy and astrophysics |
dc.rights.access | Open Access |
local.personalitzacitacio | true |
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