TY - JOUR

T1 - Neutron-star mass limit in the bimetric theory of gravitation

AU - Caporaso, George J

AU - Brecher, K.

PY - 1977

Y1 - 1977

N2 - The "neutron"-star upper mass limit is examined in Rosen's bimetric theory of gravitation. An exact solution, approximate scaling law, and numerical integration of the hydrostatic equilibrium equation show the dependence of the mass limit on the assumed equation of state. As in general relativity, that limit varies roughly as 1ρ0, where ρ0 is the density above which the equation of state becomes "stiff." Unlike general relativity, the stiffer the equation of state, the higher the mass limit. For ρ0=2×1014 g/cm3 and P=(ρ-ρ0)c2, we found Mmax=81M. This mass is consistent with causality and experimental tests of gravitation and nuclear physics. For dpdρ>c2 it appears that the upper mass limit can become arbitrarily large.

AB - The "neutron"-star upper mass limit is examined in Rosen's bimetric theory of gravitation. An exact solution, approximate scaling law, and numerical integration of the hydrostatic equilibrium equation show the dependence of the mass limit on the assumed equation of state. As in general relativity, that limit varies roughly as 1ρ0, where ρ0 is the density above which the equation of state becomes "stiff." Unlike general relativity, the stiffer the equation of state, the higher the mass limit. For ρ0=2×1014 g/cm3 and P=(ρ-ρ0)c2, we found Mmax=81M. This mass is consistent with causality and experimental tests of gravitation and nuclear physics. For dpdρ>c2 it appears that the upper mass limit can become arbitrarily large.

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U2 - 10.1103/PhysRevD.15.3536

DO - 10.1103/PhysRevD.15.3536

M3 - Article

AN - SCOPUS:35949034322

VL - 15

SP - 3536

EP - 3542

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 0556-2821

IS - 12

ER -