Hadron-Quark Crossover and Hot Neutron Stars at Birth

Autor:	Masuda, Kota, Hatsuda, Tetsuo, Takatsuka, Tatsuyuki
Rok vydání:	2015
Předmět:	Nuclear Theory Astrophysics - High Energy Astrophysical Phenomena High Energy Physics - Phenomenology
Druh dokumentu:	Working Paper
DOI:	10.1093/ptep/ptv187
Popis:	We construct a new isentropic equation of state (EOS) at finite temperature "CRover" on the basis of the hadron-quark crossover at high density. By using the new EOS, we study the structure of hot neutron stars at birth with the typical lepton fraction ($Y_l=0.3-0.4$) and the typical entropy per baryon ($S=1-2$). Due to the gradual appearance of quark degrees of freedom at high density, the temperature T and the baryon density at the center of the hot neutron stars with the hadron-quark crossover are found to be smaller than those without the crossover by a factor of 2 or more. Typical energy release due to the contraction of a hot neutron star to a cold neutron star with 1.4 solarmass is shown to be about 0.04 solarmass with the spin-up rate about 14%. Comment: 10 pages and 7 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1506.00984 Zobrazit plný text záznamu View this record from Arxiv