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NAM2012 - All Presentation Details

Record 737 of 756

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Evidence for neutron star formation without a core-collapse supernova in the double pulsar system

Author: Robert Ferdman

University of Manchester


Session: STA2: Binary Stars: Duplicity is Everywhere

Presentation type: Talk      12:45  Friday 30th 11:45-13:00 


The double pulsar system PSR J0737-3039A/B is a highly relativistic double neutron star (DNS) binary, with a 2.4-hour orbital period. The low mass of the second-formed NS, as well the low system eccentricity and proper motion, point to an alternative evolution compared to other DNS systems. We describe analysis of the pulse profile shape over 6 years of observations, and present the resulting constraints on the system geometry. We find the spin axis of the recycled pulsar in this system, PSR J0737-3039A, to be nearly aligned with the orbital angular momentum axis. Our tight constraint supports the idea that the supernova that formed the second neutron star was relatively symmetric, possibly involving electron-capture onto an O-Ne-Mg core.

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