Neutron-star mass limit in the bimetric theory of gravitation
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 1/..sqrt..rho/sub 0/, where rho/sub 0/ 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 rho/sub 0/ = 2 x 10/sup 14/ g/cm/sup 3/ and P = (rho - rho/sub 0/) c/sup 2/, we found M/sub max/ = 81M/sub sun/. This mass is consistent with causality and experimental tests of gravitation and nuclear physics. For dp/drho > c/sup 2/ it appears that the upper mass limit can become arbitrarily large.
- Research Organization:
- Department of Physics and Center for Space Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
- OSTI ID:
- 7323646
- Journal Information:
- Phys. Rev., D; (United States), Vol. 15:12
- Country of Publication:
- United States
- Language:
- English
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