Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977phrvd..15.3536c&link_type=abstract
Physical Review D - Particles and Fields, 3rd Series, vol. 15, June 15, 1977, p. 3536-3542.
Astronomy and Astrophysics
Astrophysics
6
Gravitation Theory, Neutron Stars, Relativity, Stellar Mass, Astrophysics, Black Holes (Astronomy), Critical Mass, Metric Space
Scientific paper
The upper limit on neutron-star mass is investigated in the framework of Rosen's (1973) bimetric theory of gravitation. An exact solution for the 'core' mass is presented for a specific equation of state, and it is found that neutron stars have larger masses in the bimetric theory than in general relativity. An approximate mass-limit scaling law for any equation of state is outlined, results of numerical solutions are discussed for three different equations of state in the bimetric theory, and a maximum mass of 81 solar masses is obtained. It is concluded that the upper mass limit of a neutron star is critically dependent on the theory of gravity used to calculate it and that Cygnus X-1, whose mass is estimated at between 3 and 10 solar masses, may not necessarily be a black hole.
Brecher Kenneth
Caporaso G.
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