Nordhaus, J. and Brandt, T. D. and Burrows, A. and Livne, E. and Ott, C. D. (2010) Theoretical support for the hydrodynamic mechanism of pulsar kicks. Physical Review D, 82 (10). Art. No. 103016. ISSN 0556-2821 http://resolver.caltech.edu/CaltechAUTHORS:20110520-151156536
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The collapse of a massive star’s core, followed by a neutrino-driven, asymmetric supernova explosion, can naturally lead to pulsar recoils and neutron star kicks. Here, we present a two-dimensional, radiation-hydrodynamic simulation in which core collapse leads to significant acceleration of a fully formed, nascent neutron star via an induced, neutrino-driven explosion. During the explosion, an ~10% anisotropy in the low-mass, high-velocity ejecta leads to recoil of the high-mass neutron star. At the end of our simulation, the neutron star has achieved a velocity of ~150 km s^(-1) and is accelerating at ~350 km s^(-2), but has yet to reach the ballistic regime. The recoil is due almost entirely to hydrodynamical processes, with anisotropic neutrino emission contributing less than 2% to the overall kick magnitude. Since the observed distribution of neutron star kick velocities peaks at ~300–400 km s^(-1), recoil due to anisotropic core-collapse supernovae provides a natural, nonexotic mechanism with which to obtain neutron star kicks.
|Additional Information:||© 2010 American Physical Society. Received 4 October 2010; published 30 November 2010. J. N. and A. B. are supported by the Scientific Discovery Through Advanced Computing (SciDAC) program of the DOE, under Contract No. DE-FG02-08ER41544, the NSF under Subcontract No. ND201387 to the Joint Institute for Nuclear Astrophysics (JINA, NSF Contract No. PHY- 0822648), and the NSF PetaApps program, under Contract No. OCI-0905046 via Subcontract No. 44592 from Louisiana State University to Princeton University. Computational resources were provided by the TIGRESS high-performance computer center at Princeton University, the National Energy Research Scientific Computing Center (NERSC) under Contract No. DE-AC03-76SF00098, and on the Kraken and Ranger supercomputers, hosted at NICS and TACC via TeraGrid Contract No. TG-AST100001. This material is based upon work by T. D. B. supported by the National Science Foundation. C. D. O. is partially supported by the NSF under Contract Nos. AST-0855535 and OCI-0905046.|
|Classification Code:||PACS: 97.60.Bw, 95.30.Jx, 97.60.Gb, 97.60.Jd|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||24 May 2011 14:25|
|Last Modified:||26 Dec 2012 13:15|
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