Pulsar spins from an instability in the accretion shock of supernovae

Article Abstract:

A report about a robust instability of the stalled accretion shock in core-collapse supernovae that is able to generate a strong rotational flow in the vicinity of the accreting proto-neutron star is presented. The observation suggest that sufficient angular momentum which is deposited on the photo-neutron star generate a final spin period which provides a new mechanism for the generation of neutron star spin and weakens the assumed correlation between the rotational periods of supernova progenitor cores and pulsar spin.

Science & research, North Carolina, Analysis, Supernovae, Supernovas, Angular momentum, Cosmological distances

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The new pulsar next door

Article Abstract:

Simon Johnston and colleagues discovered a new pulsar, PSR J0437-4715, at approximately 400 light-years distance using a Parkes radio telescope in Australia. This discovery was part of a systematic survey for pulsars that has covered approximately 1/6 of the celestial sphere. PSR J0437-4715 supports theories on pulsars' population density and galactic birthrates.

Radio astronomy

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