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 -