The University of Southampton
University of Southampton Institutional Repository

Freely precessing neutron stars: model and observations

Jones, D.I. and Andersson, N.A. (2001) Freely precessing neutron stars: model and observations Monthly Notices of the Royal Astronomical Society, 324, (4), pp. 811-824. (doi:10.1046/j.1365-8711.2001.04251.x).

Record type: Article

Abstract

We present a model of a freely precessing neutron star, which is then compared against pulsar observations. The aim is to draw conclusions regarding the structure of the star, and to test theoretical ideas of crust–core coupling and superfluidity. We argue that, on theoretical grounds, it is likely that the core neutron superfluid does not participate in the free precession of the crust. We apply our model to the handful of proposed observations of free precession that have appeared in the literature. Assuming crust-only precession, we find that all but one of the observations are consistent with there being no pinned crustal superfluid at all; the maximum amount of pinned superfluid consistent with the observations is about 10-10 of the total stellar moment of inertia. However, the observations do not rule out the possibility that the crust and neutron superfluid core precess as a single unit. In this case the maximum amount of pinned superfluid consistent with the observations is about 10-8 of the total stellar moment of inertia. Both of these values are many orders of magnitude less than the 10-2 value predicted by many theories of pulsar glitches. We conclude that superfluid pinning, at least as it affects free precession, needs to be reconsidered.

Full text not available from this repository.

More information

Published date: July 2001

Identifiers

Local EPrints ID: 29440
URI: http://eprints.soton.ac.uk/id/eprint/29440
ISSN: 0035-8711
PURE UUID: 272f620d-2ca4-467b-9393-f84943839bd7

Catalogue record

Date deposited: 12 May 2006
Last modified: 17 Jul 2017 15:58

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×