A toroidal vortex field as an origin of the narrow mass spectrum of neutron stars

The evolution and collapse of a gaseous, self-gravitating sphere in the presence of an internal massive toroidal vortex analogous to the vortex created by the toroidal magnetic field of the Sun is considered. When thermal pressure is taken into account, for sufficiently high masses, the instability...

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Bibliographic Details
Published inAstronomy reports Vol. 60; no. 3; pp. 322 - 331
Main Author Kontorovich, V. M.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.03.2016
Springer Nature B.V
Subjects
Astronomy
Astrophysics
Circulation
Evolution
Fluid flow
Gravitation
Magnetic fields
Neutron stars
Observations and Techniques
Origins
Physics
Physics and Astronomy
Spectrum analysis
Vortices
Neutron Star
Vortex Ring
Sound Speed
Vortex
Black Hole
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Summary:The evolution and collapse of a gaseous, self-gravitating sphere in the presence of an internal massive toroidal vortex analogous to the vortex created by the toroidal magnetic field of the Sun is considered. When thermal pressure is taken into account, for sufficiently high masses, the instability is preserved even for a polytropic index γ < 4/3. In the case of a degenerate gas, the evolution of the electrons and neutrons differs appreciably. In the ultrarelativistic limit, an interval of stablemasses arises in a neutron gas, between a minimum mass that depends on the circulation velocity in the vortex and the critical mass for the formation of a black hole. This suggests toroidal vortex fields as a possible physical origin for the observed narrow spectrum of neutron-star masses.
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ISSN:1063-7729
1562-6881
DOI:10.1134/S1063772916030094