Evidence for a Minimum Ellipticity in Millisecond Pulsars

Woan, G. and Pitkin, M. D. and Haskell, B. and Jones, D. I. and Lasky, P. D. (2018) Evidence for a Minimum Ellipticity in Millisecond Pulsars. Astrophysical Journal Letters, 863 (2). ISSN 2041-8205

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Abstract

Neutron stars spin down over time due to a number of energy-loss processes. We provide tantalizing population-based evidence that millisecond pulsars (MSPs) have a minimum ellipticity of epsilon ≈ 10−9 around their spin axis and that, consequently, some spin down mostly through gravitational-wave emission. We discuss the implications of such a minimum ellipticity in terms of the internal magnetic field strengths and nuclear matter composition of neutron stars and show it would result in the Advanced LIGO and Virgo gravitational-wave detectors, or their upgrades, detecting gravitational waves from some known MSPs in the near future.

Item Type:
Journal Article
Journal or Publication Title:
Astrophysical Journal Letters
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900/1912
Subjects:
ID Code:
135258
Deposited By:
Deposited On:
24 Jul 2019 15:55
Refereed?:
Yes
Published?:
Published
Last Modified:
09 Sep 2020 06:09