The newly detected pulsar in SN 1987A as a test of gravitational theories

Journal Article · Fri Dec 01 04:00:00 EST 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/185607· OSTI ID:7058150

Moffat, J W ^[1]

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1. Toronto Univ. (Canada)

If the recently reported 0.5 ms period pulsed optical signal from SN 1987A is associated with a young neutron star, then a new important constraint on stable neutron star solutions of gravitational theories and the equations of state has been found. The very rapid pulsar period would imply that according to Einstein's gravitational theory (EGT), the neutron star is rotating with an angular velocity that is larger than the break-up angular velocity, which would cause an unrealistic constraint on the equation of state of nonexotic nuclear matter. It is shown that the break-up speed of a neutron star in the nonsymmetric gravitational theory (NGT) can be significantly larger than in EGT and allow for conventional realistic nuclear equations of state. 12 refs.

• OSTI ID: 7058150
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 347; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640106* -- Astrophysics & Cosmology-- Cosmology
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANGULAR VELOCITY
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
EQUATIONS
EQUATIONS OF STATE
ERUPTIVE VARIABLE STARS
FIELD THEORIES
GENERAL RELATIVITY THEORY
MATTER
MOTION
NEUTRON STARS
NUCLEAR MATTER
PULSARS
PULSES
RADIATIONS
ROTATION
STARS
SUPERNOVAE
TESTING
VARIABLE STARS
VELOCITY
VISIBLE RADIATION