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Astron. Astrophys. 351, 195-200 (1999)


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The observational evidence pertinent to possible kick mechanisms in neutron stars

A.A. Deshpande 1, R. Ramachandran 2,3 and V. Radhakrishnan 1,3

1 Raman Research Institute, C.V. Raman Avenue, Bangalore - 560 080, India (desh,rad@rri.ernet.in)
2 Netherlands Foundation for Research in Astronomy, Postbus 2, 7990 AA Dwingeloo, The Netherlands (ramach@astro.uva.nl)
3 Sterrenkundig Instituut, Universiteit van Amsterdam, 1098 SJ Amsterdam, The Netherlands

Received 4 June 1999 / Accepted 23 August 1999

Abstract

We examine available observations on pulsars for evidence pertaining to mechanisms proposed to explain the origin of their velocities. We find that mechanisms predicting a correlation between the rotation axis and the pulsar velocity are ruled out. Also, that there is no significant correlation between pulsar magnetic field strengths and velocities. With respect to recent suggestions postulating asymmetric impulses at birth being solely responsible for both the spins and velocities of pulsars, single impulses of any duration and multiple extended duration impulses appear ruled out.

Key words: stars: neutron – stars: kinematics – stars: rotation – stars: binaries: general – stars: pulsars: general – stars: supernovae: general

Send offprint requests to: desh@rri.ernet.in

© European Southern Observatory (ESO) 1999

Online publication: November 2, 1999

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