Distinguishing Bare Quark Stars from Neutron Stars

Details Distinguishing Bare Quark Stars from Neutron Stars Distinguishing Bare Quark Stars from Neutron Stars

2004-07-05

arxiv.org/abs/astro-ph/0407091v1

Int.J.Mod.Phys. A19 (2004) 5335-5342

Astronomy and Astrophysics

Astrophysics

8 pages, 5 figures; contribution to proceedings of the 26th annual Montreal-Rochester-Syracuse-Toronto Conference (MRST 2004)

Scientific paper

10.1142/S0217751X04022566

Observations to date cannot distinguish neutron stars from self-bound bare quark stars on the basis of their gross physical properties such as their masses and radii alone. However, their surface luminosity and spectral characteristics can be significantly different. Unlike a normal neutron star, a bare quark star can emit photons from its surface at super-Eddington luminosities for an extended period of time. We present a calculation of the photon bremsstrahlung rate from the bare quark star's surface, and indicate improvements that are required for a complete characterization of the spectrum. The observation of this distinctive photon spectrum would constitute an unmistakable signature of a strange quark star and shed light on color superconductivity at stellar densities.

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