SIMBAD references

2019MNRAS.482.3415I - Mon. Not. R. Astron. Soc., 482, 3415-3425 (2019/January-3)

Ages of radio pulsar: long-term magnetic field evolution.

IGOSHEV A.P.

Abstract (from CDS):

We use the Bayesian approach to write the posterior probability density for the three-dimensional velocity of a pulsar and for its kinematic age. As a prior, we use the bimodal velocity distribution found in a recent article by Verbunt, Igoshev & Cator. When we compare the kinematic ages with spin-down ages we find that in general they agree with each other. In particular, maximum likelihood analysis sets the lower limit for the exponential magnetic field decay time-scale at 8 Myr with slight preference of tdec ≃ 12 Myr and compatible with no decay at all. One of the objects in the study, pulsar B0950+08 has kinematic and cooling ages ≃2 Myr which is in strong contradiction with its spin-down age τ ≃ 17 Myr. The 68 per cent credible range for the kinematic age is 1.2-8.0 Myr. We conclude that the most probable explanation for this contradiction is a combination of magnetic field decay and long initial period. Further timing, UV and X-ray observations of B0950+08 are required to better constrain its origin and evolution.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: statistical - stars: neutron - pulsars: individual: B0950+08

Simbad objects: 44

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2019.11.17-04:32:50

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