Boson stars: Rotation, formation, and evolution
type: Item
instance of: scholarly article
title: Boson stars: Rotation, formation, and evolution
zbMATH Open document ID: 0945.83024
DOI: 10.1023/A:1026673918588
author: Franz E. Schunck
author: Eckehard W. Mielke
published in: General Relativity and Gravitation
publication date: 1999-11-18T00:00:00Z
review text: The existence of rotating boson stars in general relativity is studied. One considers the Lagrange density of a gravitationally coupled complex scalar field, and the spacetime is supposed to be isotropic, stationary and axisymmetric. It is shown that the total angular momentum of a rotating boson star is proportional to the particle number \(N\). A 3D plot of the energy density \(\rho\) as function of cylindrical coordinates \(\widetilde x= x\sin\theta\) and \(z=x\cos\theta\) \((\theta\) with respect to the equatorial plane) is given. The plot shows that \(\rho\) vanishes at the axis of rotation due to ``centrifugal forces''. There is also a nearby maximum of the energy density that extends to a mass torus. The authors suggest a model of a relativistic accretion disk which is thickened along the equator. Finally, the possibility to detect boson stars by gravitational lensing or gravitational redshift is pointed out, and some results on boson stars within scalar-tensor theories are given.
Mathematics Subject Classification ID: 83E05
Mathematics Subject Classification ID: 83C55
Mathematics Subject Classification ID: 83D05
Mathematics Subject Classification ID: 83C47
zbMATH DE Number: 1364638
zbMATH Keywords: boson star
zbMATH Keywords: gravitational lensing
zbMATH Keywords: rotating body
reviewed by: Gheorghe Zet
MaRDI profile type: Publication
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full work available at URL: a:1026673918588
OpenAlex ID: W1568006872
description: scientific article; zbMATH DE number 1364638