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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Braking index jumps in young pulsars

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Author(s):
Horvath, J. E.
Total Authors: 1
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 484, n. 2, p. 1983-1987, APR 2019.
Web of Science Citations: 0
Abstract

The departure of all measured pulsar braking indexes from the `canonical' dipole value 3 has been attributed to several causes in the past. Careful monitoring of the Crab pulsar has revealed permanent changes in the spin-down rate that are most likely the accumulation of small jumps in the angle a between the magnetic and spin axis. Recently, a large permanent change in the braking index of the in the `Crab twin' pulsar B0540-69 has been reported, and an analogous phenomenon seen in the high-field pulsar PSR 1846-0258 has been seen following a glitch, while another similar event (in PSR J119-6127) needs to be confirmed. We argue in this work that a common physical origin of all these observations can be attributed to the counter-alignment of the axis without serious violations of the observed features and with very modest inferred values of the hypothesized jump in the alpha angle. In addition, detected increases of the X-ray luminosities after the events are an additional ingredient for this interpretation. We argue that a component of a time-dependent torque has been identified, being an important ingredient towards a full solution of observed pulsar timing behaviour which is in search of a consistent modelling. (AU)

FAPESP's process: 13/26258-4 - Superdense matter in the universe
Grantee:Manuel Máximo Bastos Malheiro de Oliveira
Support type: Research Projects - Thematic Grants