Effective dynamics for boson stars

We study solutions close to solitary waves of the pseudo-relativistic Hartree equation describing boson stars under the influence of an external gravitational field. In particular, we analyse the long-time effective dynamics of such solutions. In essence, we establish a ( long-time) stability result...

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Bibliographic Details
Published in:Nonlinearity 2007-05, Vol.20 (5), p.1031-1075
Main Authors: Fröhlich, J, Jonsson, B L G, Lenzmann, E
Format: Article
Language:English
Subjects:
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Exact sciences and technology
ground-states
limit
Mathematical analysis
Mathematics
nonlinear schrodinger-equations
Partial differential equations
quantum-mechanics
Sciences and techniques of general use
solitary waves
stability
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Summary:We study solutions close to solitary waves of the pseudo-relativistic Hartree equation describing boson stars under the influence of an external gravitational field. In particular, we analyse the long-time effective dynamics of such solutions. In essence, we establish a ( long-time) stability result for solutions describing boson stars that move under the influence of an external gravitational field. The proof of our main result tackles difficulties that are absent when deriving similar results on effective solitary wave motions for nonlinear Schrodinger equations or nonlinear wave equations. This is due to the fact that the pseudo-relativisitic Hartree equation does not exhibit Galilean or Lorentz covariance.
ISSN:0951-7715
1361-6544
1361-6544
DOI:10.1088/0951-7715/20/5/001