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Tidal deformations of neutron stars: The role of stratification and elasticity
Umeå University, Faculty of Science and Technology, Department of Physics.
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2011 (English)In: Physical Review D, ISSN 1550-7998, Vol. 84, no 10, 103006- p.Article in journal (Refereed) Published
Abstract [en]

We discuss the response of neutron stars to the tidal interaction in a compact binary system, as encoded in the Love number associated with the induced deformation. This problem is of interest for gravitational-wave astronomy as there may be a detectable imprint on the signal from the late stages of binary coalescence. Previous work has focused on simple barotropic neutron star models, providing an understanding of the role of the stellar compactness and overall density profile. We add realism to the discussion by developing the framework required to model stars with varying composition and an elastic crust. These effects are not expected to be significant for the next generation of detectors, but it is nevertheless useful to be able to quantify them. Our results show that (perhaps surprisingly) internal stratification has no impact whatsoever on the Love number. We also show that crust elasticity provides a (predictably) small correction to existing models.

Place, publisher, year, edition, pages
College Park, MD: American Physical Society , 2011. Vol. 84, no 10, 103006- p.
National Category
Physical Sciences Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:umu:diva-50517DOI: 10.1103/PhysRevD.84.103006ISI: 000297126700002OAI: diva2:464966
Available from: 2011-12-14 Created: 2011-12-13 Last updated: 2011-12-14Bibliographically approved

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Samuelsson, Lars
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