Astronomy and Astrophysics – Astrophysics
Scientific paper
1993-03-02
Astrophys.J. 405 (1993) L29-L32
Astronomy and Astrophysics
Astrophysics
10 pages plus 3 figures, latex, accepted ApJ Letters, sets-001
Scientific paper
10.1086/186758
The measurement or constraint of the masses of neutron stars and their binary companions tests theories of neutron star structure and of pulsar formation and evolution. We have measured the rate of the general relativistic advance of the longitude of periastron for the pulsar PSR B1802$-$07: $\dot\omega=0\fdg060\pm0\fdg009\,\mbox{yr}^{-1}$, which implies a total system mass, pulsar plus companion star, of $M=1.7\pm0.4\,\Msun$. We also present a much improved measurement of the rate of periastron advance for PSR B2303+46: $\dot\omega = 0\fdg0099\pm0\fdg0002\,\mbox{yr}^{-1}$, implying $M=2.53\pm0.08\,\Msun$ for this system. We discuss the available constraints on distribution of mass between the pulsars and their companions, and we compare the pulsar masses with other determinations of neutron star masses.
Arzoumanian Zaven
McKinnon Mark M.
Taylor Joseph H. Jr.
Thorsett Stephen. E.
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