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Post-glitch relaxation following the ninth glitch of the VELA pulsar

1993; IOP Publishing; Volume: 413; Linguagem: Inglês

10.1086/186972

1538-4357

H. F. Chau, P. M. McCulloch, Radha Nandkumar, David Pines,

Pulsars and Gravitational Waves Research

view Abstract Citations (28) References (12) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Postglitch Relaxation following the Ninth Glitch of the VELA Pulsar Chau, H. F. ; McCulloch, P. M. ; Nandkumar, R. ; Pines, D. Abstract The relaxation observed by McCulloch et al. (1993) following the ninth observed glitch of the Vela pulsar provides a stringent test of the phenomenological vortex creep theory developed by Alpar et al. (1993) to explain post-glitch behavior following its previous eight glitches. Their theory predicts that the relaxation following the ninth glitch would be characterized by linear response with short time scale relaxation times, 10 hr, 3.2 days, and 33 days, respectively, a long-term torque linear in time, and a permanent offset in the frequency derivative. We present the results of an analysis of the post-glitch behavior following the ninth glitch and find excellent agreement with these predictions. We use their theory to deduce a minimum crustal moment of inertia for the solid crust of the neutron star of some 2.6 percent of the total moment of inertia of the star, and discuss the implication of our findings for the mass of the Vela pulsar. Publication: The Astrophysical Journal Pub Date: August 1993 DOI: 10.1086/186972 Bibcode: 1993ApJ...413L.113C Keywords: Angular Velocity; Neutron Stars; Pulsars; Relaxation Time; Moments Of Inertia; Stellar Structure; Vortices; Astrophysics; DENSE MATTER; STARS: PULSARS: INDIVIDUAL NAME: VELA PULSAR; STARS: NEUTRON full text sources ADS | data products SIMBAD (1)