What do exotic equations of state have to offer?

Abstract

We present a short general overview of the main features of exotic models of neutron stars, focusing on the structural and dynamical predictions derived from them. In particular, we discuss the presence of ``normal'' quark matter and Color-Flavor Locked (CFL) states, including their possible self-bound versions, and mention some different proposals emerging from the study of QCD microphysics. A connection with actual observed data is the main goal to be addressed at this talk and along the meeting. It is demonstrated that exotic equations of state are {\it not} soft if the vacuum contributions are large enough, and argued that recent measurements of high pulsar masses ($M\ge 2M_{\odot }$) create problems for {\it hadronic} models in which hyperons should be present.

8 pages, 2 figures. To be published in the Proceedings of the conference "Isolated Neutron Stars: from the Interior to the Surface" (April 24-28, 2006, London, UK), eds. D. Page, R. Turolla, & S. Zane

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• The Stability of Strange Star Crusts and Strangelets
• Strangelet propagation and cosmic ray flux

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