Phase Conversions in Neutron Stars: Implications for Stellar Stability and Gravitational Wave Astrophysics

Universe

Germán Lugones¹  Ana Gabriela Grunfeld² 

[1] Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Avenida dos Estados 5001—Bangú, Santo André CEP 09210-580, SP, Brazil;Departamento de Física, Comisión Nacional de Energía Atómica, Av. Libertador 8250, Buenos Aires 1429, Argentina;

关键词: neutron star;    equation of state;    surface tension of dense matter;    gravitational waves;    stellar stability;   

DOI  :  10.3390/universe7120493

来源: DOAJ

【 摘 要 】

We review the properties of hybrid stars with a quark matter core and a hadronic mantle, focusing on the role of key micro-physical properties such as the quark/hadron surface and curvature tensions and the conversion speed at the interface between both phases. We summarize the results of works that have determined the surface and curvature tensions from microscopic calculations. If these quantities are large enough, mixed phases are energetically suppressed and the quark core would be separated from the hadronic mantle by a sharp interface. If the conversion speed at the interface is slow, a new class of dynamically stable hybrid objects is possible. Densities tens of times larger than the nuclear saturation density can be attained at the center of these objects. We discuss possible formation mechanisms for the new class of hybrid stars and smoking guns for their observational identification.

【 授权许可】

Unknown