High-mass twin stars with a multi-polytrope EoS [CL]


We show that in the 3-polytropes model of Hebeler et al. \cite{Hebeler:2013nza} for the neutron star equation of state at supersaturation densities a third family of compact stars can be obtained which confirms the possibility of high-mass twin stars that have coincident masses $M_1=M_2\approx 2~M_\odot$ and significantly different radii $|R_1-R_2|>2-3 $ km. We consider a scenario of a first order phase transition which eliminates one of the three polytropes from the star structure and results in a sharp boundary between a high-density and low-density phase.

Read this paper on arXiv…

D. Alvarez-Castillo and D. Blaschke
Thu, 9 Mar 17

Comments: 4 pages, 2 figures, 1 table