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Braking indices and spin evolution: something is loose inside neutron stars

Published online by Cambridge University Press:  04 June 2018

Cristóbal M. Espinoza
Cristóbal M. Espinoza*
Affiliation:
Departamento de Física, Universidad de Santiago de Chile (usach), Avenida Ecuador 3493, 9170124 Estación Central, Santiago, Chile email: cristobal.espinoza.r@usach.cl
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Abstract

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Braking indices are used to describe the evolution of pulsars rotation, and can offer insights into the braking mechanism that dominates the slow down. Here we discuss the main difficulties associated with measuring braking indices and the complexity of interpreting these measurements. Considering recent braking index measurements on pulsars with large and regular glitches, we comment on the significant effects that the loosely coupled superfluid inside pulsars might have on their spin evolution.

Keywords

pulsars: generalstars: neutron

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