Hiding a neutron star inside a wormhole
Abstract
We consider neutron-star-plus-wormhole configurations supported by a massless ghost scalar field. The neutron fluid is modeled by an anisotropic equation of state. When the central energy density of the fluid is of comparable magnitude to the one of the scalar field, configurations with an equator at the center and a double throat arise. These double-throat wormholes can be either partially or completely filled by the neutron fluid. In the latter case, the passage of light - radiated by the neutron matter - through these wormholes is studied. A stability analysis indicates that all considered configurations are unstable with respect to linear perturbations, independent of whether the fluid is isotropic or anisotropic.
Cite
@article{arxiv.1401.7093,
title = {Hiding a neutron star inside a wormhole},
author = {Vladimir Dzhunushaliev and Vladimir Folomeev and Burkhard Kleihaus and Jutta Kunz},
journal= {arXiv preprint arXiv:1401.7093},
year = {2014}
}
Comments
17 pages, 7 figures, minor corrections to content, new references added, version published in PRD. arXiv admin note: text overlap with arXiv:1302.5217