2005/02/17 by M. Bejger, P. Haensel, J. L. Zdunik · 24 citations
Physics and Astronomy · #Equation of state #Moment (physics) #Moment of inertia #Nucleation #Phase (matter) #Phase transition #Pulsars and Gravitational Waves Research #Quantum and Classical Electrodynamics #Scientific Research and Discoveries #State (computer science) #Stellar structure #astro-ph
paper · pdf · doi:10.1111/j.1365-2966.2005.08933.x
published in Monthly Notices of the Royal Astronomical Society 359(2), 699-706 (Oxford University Press) · 9 pages, 6 figures, accepted for publication in MNRAS
arxiv created 2005/02/17 · openalex publication_date 2005/04/28 · arxiv updated 2014/10/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present approximate formulae describing the changes in neutron-star parameters caused by the first-order phase transition to an exotic state (pion or kaon condensate, quark matter) resulting in formation of a mixed-phase core. The analytical formulae for the changes in radius, moment of inertia and the amount of energy released during the core-quake are derived using the theory of linear response of stellar structure to the core transformation. Numerical coefficients in these formulae are obtained for two realistic equations of state (EOSs) of dense matter. The problem of nucleation of the exotic phase as well as possible astrophysical scenarios leading to a core-quake phenomenon are also discussed.