2015/02/28 by H. Grigorian, D. Blaschke, D. N. Voskresensky · 7 citations
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics #Equation of state #Gamma-ray bursts and supernovae #Geophysics and Gravity Measurements #Neutron star #Nuclear matter #Nuclear physics #Nucleon #Physics #Pulsar #Pulsars and Gravitational Waves Research #Quark star #Star (game theory) #Stars #Strange matter #Supernova #Thermodynamics #astro-ph.HE #nucl-th
paper · pdf · doi:10.1134/s1063779615050111
published in Physics of Particles and Nuclei 46(5), 849-853 (Pleiades Publishing) · 12 pages, 3 figures, typos corrected
arxiv created 2015/03/16 · openalex publication_date 2015/09/01 · arxiv updated 2015/09/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Within the “nuclear medium cooling” scenario of neutron stars all reliably known temperature—age data, including those of the central compact objects in the supernova remnants of Cassiopeia A and XMMU-J1732, can be comfortably explained by a set of cooling curves obtained by variation of the star mass within the range of typical observed masses. The recent measurements of the masses of the pulsars PSR J1616-2230, PSR J0348-0432 and J00737-3039B and the companion of J1756-2251 provide independent proof for the existence of neutron stars with masses in a broad range from 1.2 to 2M ⊙ The values M > 2M ⊙ call for sufficiently stiff equations of state for neutron star matter. We investigate the response of the set of neutron star cooling curves to a stiffening of the nuclear equation of state so that maximum masses of about 2.4M ⊙ would be accessible and to a deconfinement phase transition from such stiff nuclear matter in the outer core to color superconducting quark matter in the inner core. Without a readjustment of cooling inputs the mass range required to cover all cooling data for the stiff DD2 equation of state should include masses of 2.426M ⊙ for describing the fast cooling of CasA while the existence of a quark matter core accelerates the cooling so that CasA cooling data are described with a hybrid star of mass 1.674M ⊙.